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NSR database version of April 11, 2024.

Search: Author = D.Ackermann

Found 225 matches.

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2024LE05      Phys.Rev.Lett. 132, 132501 (2024)

M.Le Joubioux, H.Savajols, W.Mittig, X.Flechard, L.Hayen, Yu.E.Penionzhkevich, D.Ackermann, C.Borcea, L.Caceres, P.Delahaye, F.Didierjean, S.Franchoo, A.Grillet, B.Jacquot, M.Lebois, X.Ledoux, N.Lecesne, E.Lienard, S.Lukyanov, O.Naviliat-Cuncic, J.Piot, A.Singh, V.Smirnov, C.Stodel, D.Testov, D.Thisse, J.C.Thomas, D.Verney

Search for a Neutron Dark Decay in ⁶He

RADIOACTIVITY ⁶He(α), (2n), (n); measured decay products, En, In. ¹NN; deduced a coincident neutron signal resulted in an upper limit on a dark decay branching ratio, an upper bound on a dark neutron branching ratio. The Grand Accelerateur National d'Ions Lourds (GANIL) SPIRAL1 facility.

doi: 10.1103/PhysRevLett.132.132501
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2023ZA06      Phys.Rev.Lett. 131, 262501 (2023)

I.Zanon, E.Clement, A.Goasduff, J.Menendez, T.Miyagi, M.Assie, M.Ciemala, F.Flavigny, A.Lemasson, A.Matta, D.Ramos, M.Rejmund, L.Achouri, D.Ackermann, D.Barrientos, D.Beaumel, G.Benzoni, A.J.Boston, H.C.Boston, S.Bottoni, A.Bracco, D.Brugnara, G.de France, N.de Sereville, F.Delaunay, P.Desesquelles, F.Didierjean, C.Domingo-Prato, J.Dudouet, J.Eberth, D.Fernandez, C.Fougeres, A.Gadea, F.Galtarossa, V.Girard-Alcindor, V.Gonzales, A.Gottardo, F.Hammache, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, A.Kaskas, Y.H.Kim, A.Kusoglu, M.Labiche, S.Leblond, C.Lenain, S.M.Lenzi, S.Leoni, H.Li, J.Ljungvall, J.Lois-Fuentes, A.Lopez-Martens, A.Maj, R.Menegazzo, D.Mengoni, C.Michelagnoli, B.Million, D.R.Napoli, J.Nyberg, G.Pasqualato, Zs.Podolyak, A.Pullia, B.Quintana, F.Recchia, D.Regueira-Castro, P.Reiter, K.Rezynkina, J.S.Rojo, M.D.Salsac, E.Sanchis, M.Senyigit, M.Siciliano, D.Sohler, O.Stezowski, Ch.Theisen, A.Utepov, J.J.Valiente-Dobon, D.Verney, M.Zielinska

High-Precision Spectroscopy of ²⁰O Benchmarking Ab Initio Calculations in Light Nuclei

NUCLEAR REACTIONS ²H(¹⁹O, p)²⁰O, E=8 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, level T_1/2, B(E2), B(M1). Comparison with theoretical USDB shell-model calculations and VS-IMSRG results obtained with three different Hamiltonians. Doppler shift attenuation method, the SPIRAL1 accelerator complex in GANIL.

doi: 10.1103/PhysRevLett.131.262501
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2022BR08      Phys.Rev. C 106, 014602 (2022)

A.Bronis, F.P.Hessberger, S.Antalic, B.Andel, D.Ackermann, S.Heinz, S.Hofmann, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, A.G.Popeko, B.Streicher, B.Sulignano, J.Uusitalo, M.Venhart, A.V.Yeremin

Decay studies of new isomeric states in ²⁵⁵No

RADIOACTIVITY ²⁵⁰Fm, ^252,254,255No(α)[from ²⁰⁸Pb(⁴⁸Ca, X), E=213.6, 218.4 MeV]; measured Eα. ^255mNo(IT); measured Eγ, γ(ce)-coin, γ(ER)-coin; deduced levels, three micro-sec isomers in ²⁵⁵No, J, π, T_1/2, multipolarities, Nilsson configurations. Comparison with level scheme of ²⁵⁷Rf from the decay of its isomer, and with theoretical calculations based on the mean-field models. ^253mNo, ^255mRf, ^257mRf; deduced Nilsson configurations of high-K 3-qp isomeric states in N=151 and N=153 isotopes. Systematics of experimental and theoretical single-particle states in N=153 isotones of ²⁴⁷Pu, ²⁴⁹Cm, ²⁵¹Cf, ²⁵³Fm, ²⁵⁵No, ²⁵⁷Rf, ²⁵⁹Sg, ²⁶¹Hs.

doi: 10.1103/PhysRevC.106.014602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8054. Data from this article have been entered in the XUNDL database. For more information, click here.

2022GI05      Phys.Rev. C 105, L051301 (2022)

V.Girard Alcindor, A.Mercenne, I.Stefan, F.de Oliveira Santos, N.Michel, M.Ploszajczak, M.Assie, A.Lemasson, E.Clement, F.Flavigny, A.Matta, D.Ramos, M.Rejmund, J.Dudouet, D.Ackermann, P.Adsley, M.Assuncao, B.Bastin, D.Beaumel, G.Benzoni, R.Borcea, A.J.Boston, D.Brugnara, L.Caceres, B.Cederwall, I.Celikovic, V.Chudoba, M.Ciemala, J.Collado, F.C.L.Crespi, G.D'Agata, G.De France, F.Delaunay, C.Diget, C.Domingo-Pardo, J.Eberth, C.Fougeres, S.Franchoo, F.Galtarossa, A.Georgiadou, J.Gibelin, S.Giraud, V.Gonzalez, N.Goyal, A.Gottardo, J.Goupil, S.Grevy, V.Guimaraes, F.Hammache, L.J.Harkness-Brennan, H.Hess, N.Jovancevic, D.S.Judson Oliver, O.Kamalou, A.Kamenyero, J.Kiener, W.Korten, S.Koyama, M.Labiche, L.Lalanne, V.Lapoux, S.Leblond, A.Lefevre, C.Lenain, S.Leoni, H.Li, A.Lopez-Martens, A.Maj, I.Matea, R.Menegazzo, D.Mengoni, A.Meyer, B.Million, B.Monteagudo, P.Morfouace, J.Mrazek, M.Niikura, J.Piot, Zs.Podolyak, C.Portail, A.Pullia, B.Quintana, F.Recchia, P.Reiter, K.Rezynkina, T.Roger, J.S.Rojo, F.Rotaru, M.D.Salsac, A.M.Sanchez-Benitez, E.Sanchis, M.Senyigit, N.de Sereville, M.Siciliano, J.Simpson, D.Sohler, O.Sorlin, M.Stanoiu, C.Stodel, D.Suzuki, C.Theisen, D.Thisse, J.C.Thomas, P.Ujic, J.J.Valiente-Dobon, M.Zielinska

New narrow resonances observed in the unbound nucleus ¹⁵F

NUCLEAR REACTIONS ¹H(¹⁴O, p), E=7.64 MeV/nucleon; ¹H(¹⁴O, 2p), E=7.42 MeV/nucleon; measured reaction products Ep, Ip, Eγ, Iγ, protons angular distributions, pp-coin, γγ-coin, pγ-coin; deduced σ(θ), resonances properties of ¹⁴O+p system - energy, spin and width, spectroscopic factors, major amplitudes of channels. ¹⁵F; deduced levels, J, π, configurations. Data has been analyzed and interpreted in the framework of the Gamow shell model (GSM) with the coupled-channel representation (GSMCC). Beam provided by SPIRAL1 facility (GANIL). Detectors: MUST2 (telescope composed of DSSD and CsI array) for (¹⁴O, p) reaction and MUGAST array (MUST2+VAMOS magnetic spectrometer+AGATA HPGE-array).

doi: 10.1103/PhysRevC.105.L051301
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2022HA04      Eur.Phys.J. A 58, 6 (2022)

K.Hauschild, A.Lopez-Martens, R.Chakma, M.L.Chelnokov, V.I.Chepigin, A.V.Isaev, I.N.Izosimov, D.E.Katrasev, A.A.Kuznetsova, O.N.Malyshev, A.G.Popeko, E.A.Sokol, A.I.Svirikhin, M.S.Tezekbayeva, A.V.Yeremin, Z.Asfari, O.Dorvaux, B.J.P.Gall, K.Kessaci, D.Ackermann, J.Piot, P.Mosat, B.Andel

Alpha-decay spectroscopy of ²⁵⁷Rf

RADIOACTIVITY ²⁵⁷Rf(α), (IT) [from ²⁰⁸Pb(⁵⁰Ti, n), E=240-245 MeV]; measured decay products, Eα, Iα, Eγ, Iγ; deduced α-particles energies and intensities, T_1/2, J, π, decay scheme. Nilsson configurations. The detectorarray GABRIELA at the FLNR, Dubna.

doi: 10.1140/epja/s10050-021-00657-8
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022HE04      Eur.Phys.J. A 58, 11 (2022)

F.P.Hessberger, S.Antalic, F.Giacoppo, B.Andel, D.Ackermann, M.Block, S.Heinz, J.Khuyagbaatar, I.Kojouharov, M.Venhart

Alpha-gamma decay studies of ²⁴⁷Md

RADIOACTIVITY ²⁴⁷Md(IT), (α), (SF) [from ²⁰⁹Bi(⁴⁰Ar, X)²⁴⁷Md, E=184-188 MeV]; measured decay products, Eα, Iα, Eγ, Iγ, α-γ-coin. ²⁴³Es;deduced γ- and α-particles energies and intensities, J, π, isomeric state T_1/2. Comparison with Nilsson levels. GSI Darmstadt, Penning source of the UNILAC, the velocity filter SHIP.

doi: 10.1140/epja/s10050-022-00663-4
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2022JO04      Phys.Rev. C 106, L011603 (2022)

J.E.Johnstone, V.Singh, R.Giri, S.Hudan, J.Vadas, R.T.deSouza, D.Ackermann, A.Chbihi, Q.Hourdille, A.Abbott, C.Balhoff, A.Hannaman, A.B.McIntosh, M.Sorensen, Z.Tobin, A.Wakhle, S.J.Yennello, M.A.Famiano, K.W.Brown, C.Santamaria, J.Lubian, H.O.Soler, B.V.Carlson

Proton and neutron exchange as a prelude to fusion at near-barrier energies

NUCLEAR REACTIONS ^39,41,45,47K(²⁸Si, X), ^36,44Ar(²⁸Si, X), E(cm)=34-46 MeV; measured reaction products, evaporation residues; deduced fusion excitation functions, fusion σ(E), potential energy surfaces for binary fragments. Comparison to Dirac-Hartree-Bogoliubov (DHB) calculations for the ground state densities used in Sao Paulo fusion model. Radioactive beams of K and Ar ions were produced by the coupled cyclotron facility at MSU-NSCL and thermalized in a linear gas stopper before being reaccelerated by the ReA3 linac.

doi: 10.1103/PhysRevC.106.L011603
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2021GI06      Eur.Phys.J. A 57, 93 (2021)

V.Girard Alcindor, I.Stefan, F.de Oliveira Santos, O.Sorlin, D.Ackermann, P.Adsley, J.C.Angelique, M.Assie, M.Assuncao, D.Beaumel, E.Berthoumieux, R.Borcea, L.Caceres, I.Celikovic, M.Ciemala, V.Chudoba, G.D'Agata, F.de Grancey, G.Dumitru, F.Flavigny, C.Fougeres, S.Franchoo, A.Georgiadou, N.Goyal, S.Grevy, J.Guillot, V.Guimaraes, F.Hammache, O.Kamalou, J.Kiener, S.Koyama, L.Lalanne, V.Lapoux, I.Matea, A.Matta, A.Meyer, N.Michel, P.Morfouace, J.Mrazek, F.Negoita, M.Niikura, D.Pantelica, L.Perrot, C.Petrone, J.Piot, C.Portail, T.Roger, F.Rotaru, A.M.Sanchez-Benitez, N.de Sereville, M.Stanoiu, C.Stodel, K.Subotic, D.Suzuki, V.Tatischeff, J.C.Thomas, P.Ujic, D.Verney

Probing nuclear forces beyond the nuclear drip line: the cases of ¹⁶F and ¹⁵F. A Tribute to Mahir Hussein

NUCLEAR STRUCTURE ^15,16F, ¹⁶N, ¹⁵C; analyzed available data; deduced strength of the nucleon-nucleon effective interaction, the mirror symmetry of the n-p interaction.

doi: 10.1140/epja/s10050-021-00410-1
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2021SI29      Phys.Rev. C 104, L041601 (2021)

V.Singh, J.E.Johnstone, R.Giri, S.Hudan, J.Vadas, R.T.deSouza, D.Ackermann, A.Chbihi, Q.Hourdille, A.Abbott, C.Balhoff, A.Hannaman, A.B.McIntosh, M.Sorensen, Z.Tobin, A.Wakhle, S.J.Yennello, M.A.Famiano, K.W.Brown, C.Santamaria, J.Lubian, H.O.Soler, B.V.Carlson

Impact of shell structure on the fusion of neutron-rich mid-mass nuclei

NUCLEAR REACTIONS ¹⁶O(³⁹K, X), (⁴¹K, X), (⁴⁵K, X), (⁴⁷K, X), (³⁶Ar, X), (⁴⁴Ar, X), E(cm)=23-33 MeV, [secondary radioactive ^45,47K, ⁴⁴Ar beams from ⁹Be(⁴⁸Ca, X), E=140 MeV/nucleon, followed by separation of ions using A1900 at NSCL-MSU facility]; measured reaction products, fusion σ(E); deduced reduced fusion excitation functions; investigated influence of shell effects on fusion of mid-mass nuclei. Comparison of experimental fusion cross sections with Sao Paulo model using Dirac-Hartree-Bogoliubov (DHB) densities, and densities from systematics; deduced over prediction of fusion experimental σ for closed-shell nuclei using DHB densities. ^39,41,45,47K, ^36,44Ar; predicted DHB density distributions of protons and neutrons. Relevance to importance of understanding shell effects at the saddle point for accurate description of fusion process.

doi: 10.1103/PhysRevC.104.L041601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2698.

2020DE36      Eur.Phys.J. A 56, 224 (2020)

H.M.Devaraja, S.Heinz, D.Ackermann, T.Gobel, F.P.Hessberger, S.Hofmann, J.Maurer, G.Munzenberg, A.G.Popeko, A.V.Yeremin

New studies and a short review of heavy neutron-rich transfer products

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, X), E=233.3 MeV; measured reaction products, Eγ, Iγ. ^{207,208,209,210}Tl, ^{211,212,213,214}Pb, ^{211,212,213,214}Bi, ^{213,214,215,216,217,218}Po, ^{213,214,215,216,217}At, ²¹³Rn, ^{217,218,219,220,221,222}Rn, ²¹⁴Fr, ²¹⁹Fr, ²²¹Fr, ²¹⁵Ra, ^{220,221,222,223,224}Ra, ²¹⁶Ac, ²²¹Ac, ²²³Ac, ^{225,226,227,228,229}Ac, ^223,224Th, ²²⁶Th, ^231,233Th, ^232,234,236Pa, ^237,238Pa, ²³⁰U, ²³⁷U, ²³⁹U, ^{238,239,240,241,242}Np; deduced isotopic distributions, production σ.

doi: 10.1140/epja/s10050-020-00229-2
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2020KH01      Nucl.Phys. A994, 121662 (2020)

J.Khuyagbaatar, A.K.Mistry, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, Ch.E.Dullmann, J.Even, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, J.Steiner, A.Yakushev, V.Yakusheva

The identification and confirmation of isomeric states in ²⁵⁴Rf and ²⁵⁵Rf through conversion electron detection

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁰Ti, 2n), (⁵⁰Ti, n)^254,255Rf, E=252.5, 236.0 MeV pulsed beam from the UNILAC-GSI facility; measured evaporation residues (ERs), decay products, conversion electrons, isomers, T_1/2 from (ERs)(fission events)-correlated, and (ERs)(fission events)(electron)-correlated decay curves using the gas-filled separator TASCA with multi-wire proportional counter (MWPC) and double-sided silicon strip detectors(DSSDs). ^254,255Rf; deduced T_1/2 of the ground states and isomers, production σ. Comparison of measured σ with theoretical calculations using statistical fusion-evaporation code HIVAP.

doi: 10.1016/j.nuclphysa.2019.121662
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8007. Data from this article have been entered in the XUNDL database. For more information, click here.

2020KH10      Phys.Rev. C 102, 044312 (2020)

J.Khuyagbaatar, F.P.Hessberger, S.Hofmann, D.Ackermann, H.G.Burkhard, S.Heinz, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, J.Maurer, K.Nishio

α decay of ²⁴³Fm₁₄₃ and ²⁴⁵Fm₁₄₅, and of their daughter nuclei

RADIOACTIVITY ²⁴⁵Fm(α)[from ²⁰⁸Pb(⁴⁰Ar, 3n), E=192 MeV]; ²⁴³Fm(α)[from ²⁰⁶Pb(⁴⁰Ar, 3n), E=185-204 MeV]; ²⁴¹Cf(α)[from ²⁴⁵Fm α]; ²³⁹Cf(α)[from ²⁴³Fm α]; ²³⁵Cm(α)[from ²⁴¹Cf α]; measured evaporation residues (ER), Eα, Iα, (ER)α-α-correlations for ²⁴³Fm decay chain, Eγ from ²⁴¹Cf decay, half-lives of the decays of ²⁴³Fm, ²³⁹Cf and ²³⁵Cm, the ²⁴⁵Fm and ²⁴³Fm activities separated using the SHIP separator at the GSI facility, and implanted into a position sensitive 16-strip Si detector, with six additional silicon detectors as the stop detector. ²⁴⁵Fm(α), (EC), (SF); deduced branching ratios, with upper limits for ϵ and SF modes, HF for α. ²⁴³Fm(α), (EC), (SF); deduced branching ratios, with upper limit for ϵ mode, HF for α. ^239,241Cf, ²³⁵Cm(α), (EC); deduced branching ratios, HF for α. ^239,241Cf, ²³⁷Cm; deduced one tentative level each, J, π, total internal conversion coefficient and multipolarity of a γ ray in ²³⁷Cm, Nilsson configurations. ^243,245Es, ²⁴⁶Fm(α); measured Eα.

doi: 10.1103/PhysRevC.102.044312
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020KH11      Phys.Rev. C 102, 064602 (2020)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.B.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Search for elements 119 and 120

NUCLEAR REACTIONS ²⁴⁹Bk, ²⁴⁹Cf(⁵⁰Ti, X)²⁹⁹119^*/²⁹⁹120^*, E(average)=281.5 MeV; measured evaporation residues (ERs), Eα, correlated ER-α and ER-α₁-α₂-SF events using UNILAC accelerator, TASCA separator, and Focal plane detector system (FPDS) consisting of double-sided silicon strip (DSSD) detectors, and Si-strip detectors for position and time correlations of events. ^295,296119, ^295,296120; deduced no evidence for non-random correlated events related to 3n- or 4n-channel deexcitations of the compound nuclei ²⁹⁹119 and ²⁹⁹120, within a sensitivity limit of one event corresponding to σ=65 fb for ²⁴⁹Bk+⁵⁰Ti reaction and σ=200 fb for ²⁴⁹Cf+⁵⁰Ti; discussed nonobservation of Z=119 and 120 superheavy elements within the context of the fusion-evaporation reaction mechanism.

doi: 10.1103/PhysRevC.102.064602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8036.

2020MO10      Acta Phys.Pol. B51, 849 (2020)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Isomeric States in ²⁵⁵Rf, ²⁵⁶Rf and ²⁵⁷Rf

doi: 10.5506/APhysPolB.51.849
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2020MO11      Phys.Rev. C 101, 034310 (2020)

P.Mosat, F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

K isomerism in ²⁵⁵Rf and total kinetic energy measurements for spontaneous fission of ^{255, 256, 258}Rf

RADIOACTIVITY ^255,256RF(SF)[from ^207,208Pb(⁵⁰Ti, 2n), E=228.8, 238.3, 239.8 MeV]; ²⁵⁸Db(EC)[from ²⁰⁹Bi(⁵⁰Ti, n), E=232.6 MeV]; ²⁵⁸Rf(SF)[from ²⁵⁸Db(EC)]; measured evaporation residues (ERs) using the velocity filter SHIP at GSI, spontaneous fission events using time and position correlations, (fragment)(fragment)-coin, total kinetic energy (TKE) distributions of SF fragments, half-lives of ^255,256Rf decays from ER-SF correlated events, half-life of ²⁵⁸Rf decay from ce-SF correlated events, Eγ, Iγ, x rays, ce, γ(ce)-coin, K-isomers and their half-lives in ²⁵⁵Rf from ER-ce-SF/α and ER-ce-(ce)-SF/α correlated events using the STOP and BOX silicon strip detectors, and Ge clover detector at GSI; deduced tentative bimodal fission mode. ²⁵⁵Rf; deduced levels, J, π, two new high-K isomers and their Nilsson configurations; proposed level schemes of the isomers.

doi: 10.1103/PhysRevC.101.034310
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020RA05      Phys.Rev. C 101, 034609 (2020)

D.Ramos, M.Caamano, A.Lemasson, M.Rejmund, H.Alvarez-Pol, L.Audouin, J.D.Frankland, B.Fernandez-Dominguez, E.Galiana-Baldo, J.Piot, C.Schmitt, D.Ackermann, S.Biswas, E.Clement, D.Durand, F.Farget, M.O.Fregeau, D.Galaviz, A.Heinz, A.Henriques, B.Jacquot, B.Jurado, Y.H.Kim, P.Morfouace, D.Ralet, T.Roger, P.Teubig, I.Tsekhanovich

Scission configuration of ²³⁹U from yields and kinetic information of fission fragments

NUCLEAR REACTIONS ⁹Be(²³⁸U, ²³⁹U)⁸Be, E=5.88 MeV/nucleon; measured fission fragments of ²³⁹U, α-α coin using a double-sided segmented silicon telescope SPIDER, mass and charge distribution of fission fragments, yields of fission fragment using VAMOS++ spectrometer at GANIL; deduced fragment velocity and kinetic energy, fragment neutron excess and multiplicity, average total kinetic energy of fission fragments, total excitation energy and elongation at scission. Comparison with evaluated data in ENDF/B-VIII.0, with predictions of GEF code, and with similar observables from the fission of ²⁴⁰Pu.

doi: 10.1103/PhysRevC.101.034609
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2479.

2019AC15      Acta Phys.Pol. B50, 517 (2019)

D.Ackermann

Basic Nuclear Structure Features of SHN and Perspectives at S³

doi: 10.5506/aphyspolb.50.517
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2019DE11      Eur.Phys.J. A 55, 25 (2019)

H.M.Devaraja, S.Heinz, O.Beliuskina, S.Hofmann, C.Hornung, G.Munzenberg, D.Ackermann, M.Gupta, Y.K.Gambhir, R.A.Henderson, F.P.Hessberger, A.V.Yeremin, B.Kindler, B.Lommel, J.Maurer, K.J.Moody, K.Nishio, A.G.Popeko, M.A.Stoyer, D.A.Shaughnessy

Population of nuclides with A ≥ 98 in multi-nucleon transfer reactions of ⁴⁸Ca + ²⁴⁸Cm

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, x), E=265.4, 270.2 MeV; measured production σ for directly populated nuclei ^252,254Cf, ^254m,256mEs and ²⁶⁰No[the last reaction used was ¹⁸O+²⁵⁴Es at 99 MeV] and for ^254,256Fm from parent decay using SHIP selector to select the fusion products and (in another run) target-like transfer reaction products, Compared with published data.

RADIOACTIVITY ^252,254,256Cf, ²⁵⁶Fm, ^{256,257,259,260}Md, ²⁵⁹No, ^262,263Lr(SF), (α); calculated T_1/2, SF branching ratio.

doi: 10.1140/epja/i2019-12696-3
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2019KH04      Phys.Rev. C 99, 054306 (2019)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Fusion reaction ⁴⁸Ca + ²⁴⁹Bk leading to formation of the element Ts (Z=117)

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 3n), (⁴⁸Ca, 4n)²⁹³Ts/²⁹⁴Ts, E=252.1, 254.0, 258.0 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, (ER)α-correlated decay chains, and σ using double-sided silicon strip detectors for α detection, TASCA separator for evaporation residue, and multiwire proportional counter for detection of residues at UNILAC accelerator facility of GSI. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db(α); ²⁹³Ts, ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg(α); ²⁶⁶Lr, ²⁷⁰Db, ²⁷⁷Mt, ²⁷⁷Hs(SF); measured Eα, Iα, SF events, half-lives. ²⁶⁶Lr, ²⁷⁰Db(α), (SF); measured half-lives and α/SF branching ratios. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility. A=200-240; A=240-260; systematics of α-decay half-lives of isotopes produced in ⁴⁸Ca+²⁴⁹Bk and ⁴⁸Ca+²⁴⁹Cf reactions.

doi: 10.1103/PhysRevC.99.054306
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2019LO08      Phys.Lett. B 795, 271 (2019)

A.Lopez-Martens, A.V.Yeremin, M.S.Tezekbayeva, Z.Asfari, P.Brionnet, O.Dorvaux, B.Gall, K.Hauschild, D.Ackermann, L.Caceres, M.L.Chelnokov, V.I.Chepigin, M.V.Gustova, A.V.Isaev, A.V.Karpov, A.A.Kuznetsova, J.Piot, O.N.Malyshev, A.G.Popeko, Yu.A.Popov, K.Rezynkina, H.Savajols, A.I.Svirikhin, E.A.Sokol, P.Steinegger

Measurement of proton-evaporation rates in fusion reactions leading to transfermium nuclei

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁰Ti, X)²⁵⁶Db/²⁵⁷Db/²⁵⁸Db, E=255, 265, 275 MeV; measured reaction products, Eα, Iα; deduced σ.

doi: 10.1016/j.physletb.2019.06.010
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2019MI08      Nucl.Phys. A987, 337 (2019)

A.K.Mistry, J.Khuyagbaatar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, N.Kurz, M.Laatiaoui, L.Lens, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev, Z.Zhang

The ⁴⁸Ca+¹⁸¹Ta reaction: Cross section studies and investigation of neutron-deficient 86 ≤ Z ≤ 93 isotopes

NUCLEAR REACTIONS ¹⁸¹Ta(⁴⁸Ca, x)²²⁹Np, E(cm)=212, 217, 226 MeV[energies based on σ predictions by the HIVAP code]; measured xn, αxn, pxn leading to ²²⁵Np, ²²⁵U, ²²⁴Np, Evaporation Residues (ER) separated from ⁴⁸Ca primary beam using the SHIP velocity filter at GSI, ToF and COMPAct Spectroscopy Set-up (COMPASS) comprising of DSSDs and SSSDs; deduced ²²⁵U, ^225,226,229Np decay chains; ²¹³Rn, ^213,214,215Fr, ^217,218,219Ac, ²²¹Th, ^221,222,223Pa, ²²⁵U, ^225,226Np; deduced decay data, T_1/2; compared with literature values; compiled production σ maxima in 3n and 4n evaporation channels from compound nuclei with Z=83-94 and projectiles ⁴⁰Ar, ^40,44,48Ca, ⁵⁰Ti using published experimental data.

doi: 10.1016/j.nuclphysa.2019.05.003
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2019RA23      Phys.Rev.Lett. 123, 092503 (2019)

D.Ramos, M.Caamano, A.Lemasson, M.Rejmund, L.Audouin, H.Alvarez-Pol, J.D.Frankland, B.Fernandez-Dominguez, E.Galiana-Baldo, J.Piot, D.Ackermann, S.Biswas, E.Clement, D.Durand, F.Farget, M.O.Fregeau, D.Galaviz, A.Heinz, A.I.Henriques, B.Jacquot, B.Jurado, Y.H.Kim, P.Morfouace, D.Ralet, T.Roger, C.Schmitt, P.Teubig, I.Tsekhanovich

First Direct Measurement of Isotopic Fission-Fragment Yields of ²³⁹U

NUCLEAR REACTIONS ⁹Be(²³⁸U, ⁸Be)²³⁹U, E=5.88 MeV/nucleon; measured fission products, Eα, Iα; deduced isotopic fission yields of ²³⁹U.

doi: 10.1103/PhysRevLett.123.092503
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2019VO03      Eur.Phys.J. A 55, 17 (2019)

M.Vostinar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, Ch.Droese, J.Even, S.Heinz, Z.Kalaninova, I.Kojouharov, M.Laatiaoui, A.K.Mistry, J.Piot, H.Savajols

Alpha-gamma decay studies of ²⁵⁸Db and its (grand)daughter nuclei ²⁵⁴Lr and ²⁵⁰Md

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁰Ti, n)²⁵⁸Db, E=236 MeV; measured (after separation of evaporation residues with kinetic energy 50 MeV by the SHIP velocity filter) emitted particles using position sensitive Si strip detector, six SSSDs arranged in a box surrounding the stop detector, Eγ, Iγ, X-rays using HPGe clover detector, subsequent α-decay and SF events, T_1/2 using time difference between evaporation residues implantation and subsequent α-decay of the isotopes, ²⁵⁸Db α-decays αγ-coin, αX-rays coin; deduced α, γ transitions, levels, J, π. ²⁵⁰Md, ²⁵⁴Lr, ²⁵⁴No; deduced α-decays, levels, γ transitions, Q_α systematics for ²⁵⁰Md. ²⁵⁴Lr, ²⁵⁸Db; deduced levels, J, π, possible single-particle states configurations.

doi: 10.1140/epja/i2019-12701-y
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2018AC08      Nucl.Instrum.Methods Phys.Res. A907, 81 (2018)

D.Ackermann, A.K.Mistry, F.P.Hessberger, B.Andel, S.Antalic, M.Block, L.Caceres, P.Chhetri, F.Dechery, Ch.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, O.Kamalou, N.Kurz, J.Khuyagbaatar, R.R.Mandl, T.Murbock, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, H.Savajols, O.Sorlin, Ch.Stodel, J.C.Thomas, M.Vostinar, P.Wieczorek, A.Yakushev, Z.Zhang

COMPASS-A COMPAct decay spectroscopy set-up

RADIOACTIVITY ²⁵³No(α) [from ²⁰⁷Pb(⁴⁸Ca, 2n), E not given]; measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced α-decay spectrum, branching ratios.

doi: 10.1016/j.nima.2018.01.096
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2018DI11      Phys.Lett. B 784, 199 (2018)

A.Di Nitto, J.Khuyagbaatar, D.Ackermann, L.-L.Andersson, E.Badura, M.Block, H.Brand, I.Conrad, D.M.Cox, Ch.E.Dullmann, J.Dvorak, K.Eberhardt, P.A.Ellison, N.E.Esker, J.Even, C.Fahlander, U.Forsberg, J.M.Gates, P.Golubev, O.Gothe, K.E.Gregorich, W.Hartmann, R.D.Herzberg, F.P.Hessberger, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, S.Klein, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, R.Mandl, E.Merchan, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, D.Renisch, D.Rudolph, J.Runke, L.G.Sarmiento, M.Schadel, H.Schaffner, B.Schausten, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, N.Trautmann, A.Turler, J.Uusitalo, D.Ward, M.Wegrzecki, P.Wieczorek, N.Wiehl, A.Yakushev, V.Yakusheva

Study of non-fusion products in the ₅₀Ti + ₂₄₉Cf reaction

NUCLEAR REACTIONS ²⁴⁹Cf(⁵⁰Ti, X)²¹¹Po/²¹²At/²¹³Rn/²¹⁴Fr/²¹⁵Ra/²²²Ra/²²¹Ra/²²³Ac/²¹⁸Rn/²²⁴Th/²¹⁹Fr/²²³Th/²¹⁸Rn/²¹⁹Fr/²²⁰Ra/²¹⁴Po/²¹⁹Ra/²¹⁷Rn/²¹⁵At, E=306 MeV; measured reaction products, Eα, Iα; deduced σ.

doi: 10.1016/j.physletb.2018.07.058
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2018GA14      Phys.Rev. C 97, 054606 (2018)

F.Galtarossa, L.Corradi, S.Szilner, E.Fioretto, G.Pollarolo, T.Mijatovic, D.Montanari, D.Ackermann, D.Bourgin, S.Courtin, G.Fruet, A.Goasduff, J.Grebosz, F.Haas, D.Jelavic Malenica, S.C.Jeong, H.M.Jia, P.R.John, D.Mengoni, M.Milin, G.Montagnoli, F.Scarlassara, N.Skukan, N.Soic, A.M.Stefanini, E.Strano, V.Tokic, C.A.Ur, J.J.Valiente-Dobon, Y.X.Watanabe

Mass correlation between light and heavy reaction products in multinucleon transfer ¹⁹⁷Au + ¹³⁰Te collisions

NUCLEAR REACTIONS ¹³⁰Te(¹⁹⁷Au, X), E=1.07 GeV; measured reaction products, energy loss, total energy, time of flight, mass distribution of Te isotopes and (Te-like)(Au-like)coin using the PRISMA magnetic spectrometer coupled to NOSE detector for coincidence measurements at LNL-Legnaro Tandem-ALPI facility; deduced total kinetic energy loss (TKEL) for 0n-, 2n-, 4n- and 6n-transfer channels, mass-mass correlation matrix of Te isotopes, and mass distributions from the projection of the corresponding mass-mass matrix for 0n to 6n transfer channels and compared with simulations, σ(total) of Te isotopes and compared with calculations using GRAZING code.

doi: 10.1103/PhysRevC.97.054606
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2018MI11      Acta Phys.Pol. B49, 613 (2018)

A.K.Mistry, Z.Zhang, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, J.Khuyagbaatar, N.Kurz, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

RADIOACTIVITY ²⁵⁰Fm, ²⁵⁴No(α)[Nobelium from ⁴⁸Ca(²⁰⁸Pb, 2n), E=4.55 MeV/nucleon]; measured Eα, Iα(time), αα-coin; deduced α-decay energy spectrum, Iα vs time, T_1/2, α_Fmα_No correlation, T_1/2. ²²²Th, ²¹⁸Ra, ²¹⁴Rn(α)[from α-decays ²³⁰Pu to ²²⁶U to ²³²Th to²¹⁸Ra to ²¹⁴Rn]; measured α-decay trace ²²²Th to ²¹⁸Ra to n, Eα, Iα(time), αα-coin, αα-correlations; deduced summary of α-decay chains starting with ²²⁷U, ²²⁹Np, ^229,230Pu using also literature references.

doi: 10.5506/aphyspolb.49.613
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2018MO20      Acta Phys.Pol. B49, 605 (2018)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, K.Nishio, J.Piot, B.Sulignano, M.Vostinar

Total Kinetic Energy Measurements for Spontaneous Fission of ^{255, 256, 258}Rf

RADIOACTIVITY ^255,256,258Rf(SF) [Rf isotopes produced in fusion-evaporation reactions]; measured fission fragments kinetic energy vs fragment implantation depth using STIP BOX coincidences and anticoincidences; deduced TKE.

doi: 10.5506/aphyspolb.49.605
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2018RA11      Phys.Rev.Lett. 120, 232503 (2018)

S.Raeder, D.Ackermann, H.Backe, R.Beerwerth, J.C.Berengut, M.Block, A.Borschevsky, B.Cheal, P.Chhetri, Ch.E.Dullmann, V.A.Dzuba, E.Eliav, J.Even, R.Ferrer, V.V.Flambaum, S.Fritzsche, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, U.Kaldor, O.Kaleja, J.Khuyagbaatar, P.Kunz, M.Laatiaoui, F.Lautenschlager, W.Lauth, A.K.Mistry, E.Minaya Ramirez, W.Nazarewicz, S.G.Porsev, M.S.Safronova, U.I.Safronova, B.Schuetrumpf, P.Van Duppen, T.Walther, C.Wraith, A.Yakushev

Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

NUCLEAR MOMENTS ^252,253,254No; measured excitation spectra, hyperfine structure components; deduced nuclear magnetic and quadrupole moments, charge radii. Comparison with the state-of-the-art nuclear density functional calculations.

doi: 10.1103/PhysRevLett.120.232503
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2018SA45      Phys.Rev. C 98, 044307 (2018)

A.Saamark-Roth, L.G.Sarmiento, D.Rudolph, J.Ljungberg, B.G.Carlsson, C.Fahlander, U.Forsberg, P.Golubev, I.Ragnarsson, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, D.M.Cox, A.Di Nitto, Ch.E.Dullmann, K.Eberhardt, J.Even, J.M.Gates, J.Gerl, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, A.Mistry, C.Mokry, J.P.Omtvedt, P.Papadakis, J.Runke, K.Rykaczewski, M.Schadel, H.Schaffner, B.Schausten, P.Thorle-Pospiech, N.Trautmann, T.Torres, A.Turler, A.Ward, N.Wiehl, A.Yakushev

Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei

RADIOACTIVITY ²¹⁹Ra(α)[from ²⁴³Am(⁴⁸Ca, X), E=242.1, 245.0 MeV]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x ray)-coin, α-α correlations using TASISpec at the TASCA, GSI facility. Pileup analysis and GEANT4 simulation of ²¹⁹Ra to ²¹⁵Rn decay. ^{219,219m,220,221}Ra, ^215,216,217Rn, ^212,213Po, ²¹⁹Fr, ²¹⁵At(α); measured half-lives, Qα. ²¹⁹Ra, ²¹⁵Rn; deduced levels, J, π, isomer in ²¹⁹Ra Comparison with shell model calculations and theoretical calculations of deformation, rotational states and α-decay rates, and with evaluated data in the ENSDF database.

doi: 10.1103/PhysRevC.98.044307
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2018ST06      Phys.Lett. B 779, 456 (2018)

I.Stefan, B.Fornal, S.Leoni, F.Azaiez, C.Portail, J.C.Thomas, A.V.Karpov, D.Ackermann, P.Bednarczyk, Y.Blumenfeld, S.Calinescu, A.Chbihi, M.Ciemala, N.Cieplicka-Orynczak, F.C.L.Crespi, S.Franchoo, F.Hammache, L.W.Iskra, B.Jacquot, R.V.F.Janssens, O.Kamalou, T.Lauritsen, M.Lewitowicz, L.Olivier, S.M.Lukyanov, M.Maccormick, A.Maj, P.Marini, I.Matea, M.A.Naumenko, F.de Oliveira Santos, C.Petrone, Yu.E.Penionzhkevich, F.Rotaru, H.Savajols, O.Sorlin, M.Stanoiu, B.Szpak, O.B.Tarasov, D.Verney

Neutron-rich nuclei produced at zero degrees in damped collisions induced by a beam of ¹⁸O on a ²³⁸U target

NUCLEAR REACTIONS ²³⁸U(¹⁸O, X)¹²B/¹³B/¹⁴B/¹⁵B/¹³C/¹⁴C/¹⁵C/¹⁶C/¹⁷C/¹⁸C/¹⁹C, ¹⁴N/¹⁵N/¹⁶N/¹⁷N/¹⁸N/¹⁹N/²⁰N, ¹⁶O/¹⁷O/¹⁸O/¹⁹O/²⁰O/²¹O/²²O, ¹⁷F/¹⁸F/¹⁹F/²⁰F/²¹F/²²F/²³F/²⁴F/²²Ne/²³Ne/²⁴Ne/²⁵Ne, E=8.5 MeV/nucleon; measured reaction products; deduced σ(θ), momentum distributions. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2018.02.037
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2018VA03      Phys.Rev. C 97, 031601 (2018)

J.Vadas, V.Singh, B.B.Wiggins, J.Huston, S.Hudan, R.T.deSouza, Z.Lin, C.J.Horowitz, A.Chbihi, D.Ackermann, M.Famiano, K.W.Brown

Probing the fusion of neutron-rich nuclei with re-accelerated radioactive beams

NUCLEAR REACTIONS ²⁸Si(³⁹K, X), (⁴⁷K, X), E=2-3 MeV/nucleon, [ions of ³⁹K from a source, and ⁴⁷K from a thermalized radioactive beam charge bred in an ion trap, injected into the ReA3 linac at NSCL-MSU facility]; measured reaction products, particles by ΔE-TOF, fusion σ(E); deduced impact of additional neutrons on fusion. Comparison with Wong parametrization, and with different models including coupled-channel calculations using CCFULL code.

doi: 10.1103/PhysRevC.97.031601
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2017AC02      Phys.Scr. 92, 083002 (2017)

D.Ackermann, C.Theisen

Nuclear structure features of very heavy and superheavy nuclei-tracing quantum mechanics towards the 'island of stability'

doi: 10.1088/1402-4896/aa7921
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2017GA05      Acta Phys.Pol. B48, 609 (2017)

F.Galtarossa, L.Corradi, E.Fioretto, D.Montanari, S.Szilner, T.Mijatovic, G.Pollarolo, D.Ackermann, D.Bourgin, S.Courtin, A.Goasduff, J.Grebosz, F.Haas, H.M.Jia, D.Jelavic-Malenica, S.Jeong, P.R.John, M.Milin, G.Montagnoli, F.Scarlassara, N.Skukan, N.Soic, A.M.Stefanini, E.Strano, V.Tokic, C.A.Ur, J.J.Valiente-Dobon, Y.Watanabe

Neutron-rich Nuclei Populated in Multi-nucleon Transfer Reactions: the ¹⁹⁷Au+¹³⁰Te System

NUCLEAR REACTIONS ¹³⁰Te(¹⁹⁷Au, x), E=5.5 MeV/nucleon; measured reaction products using large acceptance magnetic spectrometer PRISMA for light partner close to grazing angle and MWPPAC (Multi-Wire Parallel Plate Avalanche Counter) followed by BC (Bragg Chamber) for coincidence and timing; deduced ΔE-E matrix, binary partners masses, Q, Bragg peak matrix vs energy released in BC.

doi: 10.5506/APhysPolB.48.609
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2017HE11      Eur.Phys.J. A 53, 123 (2017)

F.P.Hessberger, D.Ackermann

Some critical remarks on a sequence of events interpreted to possibly originate from a decay chain of an element 120 isotope

NUCLEAR REACTIONS ²⁴⁸Cm(⁵⁴Cr, x), E not given; analyzed data from SHIP at GSI Darmstadt; deduced low probability that the sequence of 3 α-particles followed by spontaneous fission belongs to the element 120.

doi: 10.1140/epja/i2017-12307-5
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2017LO13      Phys.Rev. C 96, 034315 (2017)

Ch.Lorenz, L.G.Sarmiento, D.Rudolph, D.E.Ward, M.Block, F.P.Hessberger, D.Ackermann, L.-L.Andersson, M.L.Cortes, C.Droese, M.Dworschak, M.Eibach, U.Forsberg, P.Golubev, R.Hoischen, I.Kojouharov, J.Khuyagbaatar, D.Nesterenko, I.Ragnarsson, H.Schaffner, L.Schweikhard, S.Stolze, J.Wenzl

Quantum-state-selective decay spectroscopy of ²¹³Ra

RADIOACTIVITY ²¹³Ra(α), (EC), (β⁺)[from ¹⁷⁰Er(⁴⁸Ca, 5n), E=4.30 MeV/nucleon using velocity filter SHIP and SHIPTRAP Penning trap at GSI UNILAC facility]; ²⁰⁹Rn(α), (EC), (β⁺)[from ²¹³Ra α decay]; ²¹³Fr(α), (EC), (β⁺)[from ²¹³Ra EC decay]; ²⁰⁹At(α), (EC), (β⁺)[from ²⁰⁹Rn EC decay]; measured Eα, Iα, Eγ, Iγ, αγ-coin, (x ray)α-coin, α and EC+β⁺ branching ratios using TASISpec setup at GSI. GEANT4 simulations. ²⁰⁹Rn; deduced levels, α feedings, γ-ray branching ratios, multipolarity. Comparison with evaluated data, and Nilsson-Strutinsky and shell-model calculations. ²⁰⁹Rn; calculated levels, J, π using shell model with pbpop interaction, total energy surface in (ϵ₂, ϵ₄) plane, and compared with experimental data, and other theoretical calculations.

doi: 10.1103/PhysRevC.96.034315
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2016AN10      Phys.Rev. C 93, 064316 (2016)

B.Andel, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, S.Hofmann, M.Huyse, Z.Kalaninova, B.Kindler, I.Kojouharov, P.Kuusiniemi, B.Lommel, K.Nishio, R.D.Page, B.Sulignano, P.Van Duppen

Short-lived isomers in ¹⁹²Po and ¹⁹⁴Po

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, 2np), E=259 MeV; ¹⁴⁴Sm(⁵¹V, 2np), E=235 MeV; measured reaction products, Eγ, Iγ, γγ-coin, cross sections, half-lives of isomers by (ER)γα and (ER)γγα correlations using SHIP focal plane detectors at GSI. ^192,194Po; deduced levels, J, π, energies of isomeric state, multipolarity, B(E1) and B(E3) values for ¹⁹²Po. Discussed systematics of 11- isomers, B(E1) and B(E3) values in even-A Po and Pb isotopes.

doi: 10.1103/PhysRevC.93.064316
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2016FO10      Nucl.Phys. A953, 117 (2016)

U.Forsberg, D.Rudolph, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, C.Fahlander, J.M.Gates, P.Golubev, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, L.G.Sarmiento, M.Schadel, A.Yakushev, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, J.Dobaczewski, K.Eberhardt, J.Even, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, W.Nazarewicz, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, Y.Shi, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Recoil-α-fission and recoil-α-α- fission events observed in the reaction ⁴⁸Ca + ²⁴³Am

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, x), E=242.1, 245.0 MeV; measured reaction products, fission products, Eα, Iα(t), αα-coin, (recoil)α-coin, En, In using He-gas filled TASCA, TASISpec based on DSSSDs, other DSSSDs; deduced correlation times, α energy spectra, 23 α-decay chains of five α's and α+3n, fragments T_1/2. Discussed existence of long decay chains; compared with published results.

RADIOACTIVITY ^289,288Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced T_1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016HE08      Eur.Phys.J. A 52, 192 (2016)

F.P.Hessberger, S.Antalic, A.K.Mistry, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, M.Laatiaoui, B.Lommel, J.Piot, M.Vostinar

Alpha- and EC-decay measurements of ²⁵⁷Rf

RADIOACTIVITY ²⁵⁷Rf(α), (EC); measured Eα, Iα, Eγ, Iγ, γα-coin, γα delayed coin, γα correlations, conversion electrons, X-rays using Ge clover detector for γ, ADC, TAC. ²⁵⁷Rf deduced enhanced α-decay scheme, new transition from 70 keV level to 724 level in ²⁵³No, possible EC-decay scheme. ²⁵³No deduced levels, new E1 γ transition from 724 keV to 167 keV level. ²⁵⁷Lr deduced T_1/2. Experimental levels in ²⁴⁵Pu, ²⁴⁷Cm, ²⁴⁹Cf, ²⁵¹Fm, ²⁵³No, ²⁵⁵Rf compared with published calculations for the same nuclei (plus ²⁵⁷Sg).

doi: 10.1140/epja/i2016-16192-0
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2016HE13      Eur.Phys.J. A 52, 278 (2016)

S.Heinz, H.M.Devaraja, O.Beliuskina, V.Comas, S.Hofmann, C.Hornung, G.Munzenberg, D.Ackermann, M.Gupta, R.A.Henderson, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann, J.Maurer, K.J.Moody, K.Nishio, A.G.Popeko, D.A.Shaughnessy, M.A.Stoyer, A.V.Yeremin

Synthesis of new transuranium isotopes in multinucleon transfer reactions using a velocity filter

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, x), E=5.3 MeV/nucleon; measured Eα, Iα, ²²⁵Pa velocity spectrum; deduced, identified 90 known isotopes and 5 new ones (3 produced directly in the reaction, 2 via precursor decays), their production σ.

doi: 10.1140/epja/i2016-16278-7
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2016HE15      Eur.Phys.J. A 52, 328 (2016)

F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Investigation of electron capture decay of ²⁵⁸Db and α decay of ²⁵⁸Rf

RADIOACTIVITY ²⁵⁸Db(EC), ²⁵⁸Rf(α), (SF); measured ²⁵⁸Db K-shell X-rays, Eγ, Iγ(t), CE, (X-ray)(CE)-coin; measured ²⁵⁸Rf spontaneous fission, Eα, Iα; measured delayed coin between ²⁵⁸Db and ²⁵⁸Rf decays; deduced isomeric states, T_1/2; deduced ²⁵⁸Rf α branch decay, α branching ratio, mass excess using ²⁵⁴No mass excess. Halflives compared with those measured by different types of correlation, mass excess compared with systematics for e-e nuclei.

doi: 10.1140/epja/i2016-16328-2
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2016LA25      Nature(London) 535, 495 (2016)

M.Laatiaoui, W.Lauth, H.Backe, Mi.Block, D.Ackermann, B.Cheal, P.Chhetri, C.E.Dullmann, P.van Duppen, J.Even, R.Ferrer, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, O.Kaleja, J.Khuyagbaatar, P.Kunz, F.Lautenschlager, A.K.Mistry, S.Raeder, E.Minaya Ramirez, T.Walther, C.Wraith, A.Yakushev

Atom-at-a-time laser resonance ionization spectroscopy of nobelium

NUCLEAR REACTIONS ^206,208Pb(⁴⁸Ca, 2n), E=217 MeV; measured reaction products; deduced σ, ground-state transition, an upper limit for the ionization potential of nobelium.

doi: 10.1038/nature19345
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2015AC04      Nucl.Phys. A944, 376 (2015)

D.Ackermann

Nuclear spectroscopy in nuclei with Z ≥ 110

doi: 10.1016/j.nuclphysa.2015.09.002
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2015AN05      Eur.Phys.J. A 51, 41 (2015)

S.Antalic, F.P.Hessberger, D.Ackermann, S.Heinz, S.Hofmann, B.Kindler, J.Khuyagbaatar, B.Lommel, R.Mann

Nuclear isomers in ²⁵⁹Sg and ²⁵⁵Rf

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁴Cr, n), E=257-270 MeV; measured evaporation residues using PSSD strips, Eα, Iα, Eγ, Iγ, αγ-coin using Ge.

RADIOACTIVITY ²⁵⁹Sg(α), (EC), (β⁺); measured Eα, Iα(t), αα correlations, α(ER) correlations, time α-decay curves; deduced branching ratios, T_1/2. ²⁵⁵Rf, ²⁵⁹Sg; deduced isomeric state, T_1/2. ²⁵⁵Rf, ²⁵⁹Sg(SF), (α), (β⁺); measured α decay using PSSD, distribution of correlation times, fission spectra; deduced hindrance factor, single-particle level, J, π systematics, decay scheme for α decay of ²⁵⁹Sg. ²⁵⁵Rf deduced branching ratios.

doi: 10.1140/epja/i2015-15041-0
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2015DE22      Phys.Lett. B 748, 199 (2015)

H.M.Devaraja, S.Heinz, O.Beliuskina, V.Comas, S.Hofmann, C.Hornung, G.Munzenberg, K.Nishio, D.Ackermann, Y.K.Gambhir, M.Gupta, R.A.Henderson, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, K.J.Moody, J.Maurer, R.Mann, A.G.Popeko, D.A.Shaughnessy, M.A.Stoyer, A.V.Yeremin

Observation of new neutron-deficient isotopes with Z≥92 in multinucleon transfer reactions

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, X)²¹⁶U/²¹²Th/²⁰⁸Fr/²¹⁹Np/²²³Am/²¹⁵Pa/²¹¹Ac/²⁰⁷Fr/²²⁹Am/²²⁵Np/²¹³Fr/²³³Bk/²²⁵Np, E=270 MeV; measured reaction fragments, Eα, Iα; deduced five new isotopes σ, T_1/2. Comparison with available data.

doi: 10.1016/j.physletb.2015.07.006
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2015HE30      Eur.Phys.J. A 51, 140 (2015)

S.Heinz, O.Beliuskina, V.Comas, H.M.Devaraja, C.Heinz, S.Hofmann, E.Kozulin, F.Morherr, G.Munzenberg, D.Ackermann, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann, J.Maurer

Nuclear molecule formation and time delay in collisions of nuclei with Z₁ + Z₂ ≥ 110

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, x), E=4.85-5.92 MeV/nucleon;²⁰⁸Pb(¹³²Xe, αx), (¹³²Xe, x), E=6.1 MeV/nucleon; measured reaction fragments using SHIP velocity filter, Eα, Iα. Po, At, Rn, Fr, Ra deduced velocity spectra, σ(θ), TKE, quadrupole deformation, nuclear molecule lifetime. ²³⁸U(²³⁸U, x), E=6.09, 6.29, 6.91, 7.10, 7.35 MeV/nucleon; measured reaction fragments using VAMOS spectrometer; deduced TKE, interaction lifetime vs mass number, σ vs mass number, quadrupole deformation; calculated σ vs mass number, quadrupole deformation.

doi: 10.1140/epja/i2015-15140-x
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2015KA24      Phys.Rev. C 92, 014321 (2015)

Z.Kalaninova, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, B.Kindler, M.Laatiaoui, B.Lommel, J.Maurer

Levels in ²²³Th populated by α decay of ²²⁷U

RADIOACTIVITY ²²⁷U(α)[from ²⁰⁸Pb(²²Ne, 3n), E=104 MeV]; measured reaction products, Eα, Iα, Eγ, Iγ, αγ-coin, αα-correlations at GSI facility. ²²³Th; deduced levels, J, π, α feedings, α hindrance factors, conversion coefficients, multipolarities. Monte Carlo simulation of α spectrum using GEANT4 code.

doi: 10.1103/PhysRevC.92.014321
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2015KH09      Phys.Rev.Lett. 115, 242502 (2015)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.L-.Andersson, M.Block, H.Brand, D.M.Cox, J.Even, U.Forsberg, P.Golubev, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, J.Jeppsson, b.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, M.Maiti, S.Minami, A.K.Mistry, C.M.Mrosek, I.Pysmenetska, D.Rudolph, L.G.Sarmiento, H.Schaffner, M.Schadel, B.Schausten, J.Steiner, T.Torres De Heidenreich, J.Uusitalo, M.Wegrzecki, N.Wiehl, V.Yakusheva

New Short-Lived Isotope ²²¹U and the Mass Surface Near N = 126

RADIOACTIVITY ^221,222U, ²¹⁸Ac(α) [from ¹⁷⁶Yb(⁵⁰Ti, X)²²¹U/²²²U, E=231-255 MeV]; measured decay products, Eα, Iα. ^214,215Ra, ^217,218,219Th, ²¹⁴Fr, ^221,222U; deduced T_1/2, Q-values. A fast data readout technique, comparison with FRDM95 and HFB26 calculations.

doi: 10.1103/PhysRevLett.115.242502
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2015PR04      Phys.Rev. C 91, 034324 (2015)

V.Prassa, B.-N.Lu, T.Niksic, D.Ackermann, D.Vretenar

High-K isomers in transactinide nuclei close to N=162

NUCLEAR STRUCTURE ^{264,266,268,270}Rf, ^{266,268,270,272}Sg, ^{268,270,272,274}Hs, ^{270,272,274,276}Ds; calculated lowest two-quasiparticle states, and lowest calculated two-quasiparticle K isomers, self-consistent RHB triaxial energy contours in (β, γ) plane for even-even Hs isotopes shape evolutions. Relevance to occurrence of deformed shell gaps in very heavy nuclei. Self-consistent mean-field framework based on relativistic energy density functionals.

doi: 10.1103/PhysRevC.91.034324
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2015RU11      J.Radioanal.Nucl.Chem. 303, 1185 (2015)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Selected spectroscopic results on element 115 decay chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced Q-values, level energies, branching ratios. Comparison with GEANT4 Monte-Carlo simulations.

doi: 10.1007/s10967-014-3445-y
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2014AN10      Phys.Rev. C 90, 044312 (2014)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, J.Elseviers, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann, R.D.Page, P.Van Duppen, M.Venhart

α decay of ¹⁷⁶Au

RADIOACTIVITY ¹⁷⁶Au(α)[from ¹⁴¹Pr(⁴⁰Ca, 5n), E=208, 212 MeV using UNILAC and SHIP at GSI]; ¹⁷²Ir(α)[from ¹⁷⁶Au α parent]; measured Eα, Iα, Eγ, Iγ, αγ-, αα-coin; deduced branching ratios, hindrance factors, reduced α-decay widths, Q-values, GEANT simulations, new α decay branch for decay of high spin isomer of ¹⁷²Ir. ¹⁷²Ir, ¹⁶⁸Re; deduced levels, isomers, J, π, multipolarity, configuration. ¹⁸⁰Tl(α); discussed α decay results of experiment at ISOLDE-CERN facility. ¹⁶⁸Re, ¹⁷²Ir, ¹⁷⁶Au; discussed general systematics of multiplet states, and calculated Nilsson orbitals for neutrons and protons for ¹⁷²Ir and ¹⁷⁶Au. Comparison with previous experimental results. ¹⁷⁵Pt, ¹⁷⁷Au(α); observed α.

doi: 10.1103/PhysRevC.90.044312
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2014BE41      Eur.Phys.J. A 50, 161 (2014)

O.Beliuskina, S.Heinz, V.Zagrebaev, V.Comas, C.Heinz, S.Hofmann, R.Knobel, M.Stahl, D.Ackermann, F.P.Hessberger, B.Kindler, B.Lommel, J.Maurer, R.Mann

On the synthesis of neutron-rich isotopes along the N = 126 shell in multinucleon transfer reactions

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, x), E=4.80-5.92 MeV/nucleon; measured Eα, Iα, Eγ, Iγ from deep-inelastic fragments using SHIP; deduced γ transitions. Os, Ir, Pt, Au, Hg, Tl deduced isotope production σ; calculated isotope production σ using stochastic approach and Langevine-type dynamical equations. Cross sections compared with ²⁰⁸Pb(⁶⁴Ni, x) thick target and fragmentation data.

doi: 10.1140/epja/i2014-14161-3
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2014KA23      Phys.Rev. C 89, 054312 (2014)

Z.Kalaninova, S.Antalic, A.N.Andreyev, F.P.Hessberger, D.Ackermann, B.Andel, L.Bianco, S.Hofmann, M.Huyse, B.Kindler, B.Lommel, R.Mann, R.D.Page, P.J.Sapple, J.Thomson, P.Van Duppen, M.Venhart

Decay of ^201-203Ra and ^200-202Fr

RADIOACTIVITY ^{200,201,201m,202,202m}Fr, ^{201,201m,202,203,203m}Ra(α)[from ^147,149Sm(⁵⁶Fe, X), E=236-275 MeV]; ^198,199,199mRn, ^196,197,197mAt, ^198,198mAt, ¹⁹⁴Po(α)[daughters of Fr and Ra α decay chains]; measured Eα, Iα, γα-coin, Eγ, Iγ, (evaporation residues)α and α₁-α₂, ER-fission correlations, half-lives using SHIP separator at GSI; deduced level energies of some of the isomers, Q(α), α branching ratios for some activities, reduced widths from Rasmussen prescription. ^200,201Fr; deduced new micro-sec isomers from γ-ray and x-ray data, half-lives. ²⁰⁰Fr; deduced evidence for beta-delayed fission from Er-fission correlated events. Comparison with previous experimental data. Systematics of Q(α) and reduced α widths in N=102-140 Po, Rn and Ra isotopes. Systematics of single-particle levels in N=104-126 Fr, At and Bi isotopes.

doi: 10.1103/PhysRevC.89.054312
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2014KH04      Phys.Rev.Lett. 112, 172501 (2014)

J.Khuyagbaatar, A.Yakushev, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

⁴⁸Ca + ²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, X)²⁹⁴Ts, E=268.3, 270.2, 274.1 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with experimental data.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db, ²⁶⁶Lr(α); measured decay products, Eα, Iα; deduced T_1/2. Comparison with experimental data.

doi: 10.1103/PhysRevLett.112.172501
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2014NI16      Nucl.Data Sheets 119, 299 (2014)

K.Nishio, H.Ikezoe, S.Hofmann, D.Ackermann, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, S.Heinz, J.A.Heredia, F.P.Hessberger, K.Hirose, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, M.Makii, R.Mann, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, S.Saro, M.Schadel, A.G.Popeko, A.Turler, Y.Wakabayashi, Y.Watanabe, A.Yakushev, A.Yeremin

Study of Heavy-ion Induced Fission for Heavy Element Synthesis

NUCLEAR REACTIONS ²³⁸U(³⁰Si, F), (³⁴S, F), E^*=30-68 MeV;²³⁸U(³⁶S, F), E(cm)=140-180 MeV; measured reaction products; calculated σ; deduced σ. ²³⁸U(³⁰Si, xn), E(cm)=125-160 MeV;²³⁸U(³⁴S, xn), E(cm)=140-180 MeV; measured reaction products; deduced σ; calculated σ.

doi: 10.1016/j.nds.2014.08.082
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2014RU04      Acta Phys.Pol. B45, 263 (2014)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

RADIOACTIVITY ^287,288Mc, ^283,284Nh, ^279,280Rg, ^275,276Mt, ^271,272Bh(α), ^267,268Db(SF) [from ²⁴³Am(⁴⁸Ca, X), E not given]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays; deduced T_1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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2014YA33      Inorg. Chem. 53, 1624 (2014)

A.Yakushev, J.M.Gates, A.Turler, M.Schadel, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, K.Eberhardt, H.G.Essel, J.Even, U.Forsberg, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, L.J.Niewisch, H.Nitsche, J.P.Omtvedt, E.Parr, Z.Qin, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, Xn)²⁸⁸Fl/²⁸⁹Fl, E=259.4 MeV; measured reaction products, Eα, Iα; deduced two atoms of flerovium, the observed adsorption behavior of Fl points to a higher inertness compared to its nearest homologue in the group, Pb. However, the measured lower limit for the adsorption enthalpy of Fl on a Au surface points to the formation of a metal-metal bond of Fl with Au. Fl is the least reactive element in the group, but still a metal.

doi: 10.1021/ic4026766
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2013AN03      Phys.Rev. C 87, 014317 (2013)

A.N.Andreyev, S.Antalic, D.Ackermann, L.Bianco, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, Z.Kalaninova, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, K.Nishio, R.D.Page, J.J.Ressler, B.Streicher, S.Saro, B.Sulignano, P.Van Duppen

β-delayed fission of ^{192, 194}At

RADIOACTIVITY ¹⁹²At(β⁺F)[from ¹⁴⁴Sm(⁵¹V, 3n), E=230 MeV]; ¹⁹⁴At(β⁺F)[from ¹⁴¹Pr(⁵⁶Fe, 3n), E=259 MeV]; measured fission fragments, total energy spectrum, (fragment)γ-coin, T_1/2 using recoil-fission correlation technique at SHIP facility in GSI. ^192,194Po; deduced upper limits on TKE, β-delayed fission (βDF) probabilities. Discussed unusually high β-delayed fission probability for ¹⁹²At. ¹⁹⁴At(β⁺F)[from ¹⁴⁴Sm(⁵²Cr, pn), E=236 MeV]; analyzed fission fragment spectra; deduced T_1/2.

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, xn)¹⁹³At/¹⁹⁴At/¹⁹⁵At, E=230-270 MeV; measured α spectra for ^193,194,195At, and delayed fission spectra for ¹⁹⁴At, σ(E).

doi: 10.1103/PhysRevC.87.014317
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2013AN08      Acta Phys.Pol. B44, 387 (2013)

S.Antalic, F.P.Hessberger, D.Ackermann, M.Block, S.Heinz, S.Hofmann, Z.Kalaninova, B.Kindler, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano

Nuclear Structure of Heavy N = 153 Isotones

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁴Cr, n)²⁵⁹Sg, E=257-270 MeV; measured reaction products; deduced σ.

RADIOACTIVITY ²⁵⁹Sg(α) [from ²⁰⁶Pb(⁵⁴Cr, n)²⁵⁹Sg, E=257-270 MeV]; measured decay products, Eα, Iα; deduced T_1/2 for isomeric states.

doi: 10.5506/APhysPolB.44.387
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2013AN10      Phys.Rev. C 87, 054311 (2013)

A.N.Andreyev, V.Liberati, S.Antalic, D.Ackermann, A.Barzakh, N.Bree, T.E.Cocolios, J.Diriken, J.Elseviers, D.Fedorov, V.N.Fedosseev, D.Fink, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, O.Ivanov, J.Khuyagbaatar, B.Kindler, U.Koster, J.F.W.Lane, B.Lommel, R.Mann, B.Marsh, P.Molkanov, K.Nishio, R.D.Page, N.Patronis, D.Pauwels, D.Radulov, S.Saro, M.Seliverstov, M.Sjodin, I.Tsekhanovich, P.Van den Bergh, P.Van Duppen, M.Venhart, M.Veselsky

α-decay spectroscopy of the chain ¹⁷⁹Tl^g → ¹⁷⁵Au^g → ¹⁷¹Ir^g → ¹⁶⁷Re^m

RADIOACTIVITY ¹⁷⁹Tl(α)[from U(p, F), E=1.4 GeV and ¹⁴⁴Sm(⁴⁰Ca, 4np), E=232 MeV]; ¹⁷⁵Au, ¹⁷¹Ir(α)[from ¹⁷⁹Tl(α) decay]; measured Eα, Iα, Eγ, (recoil)α-, αα-coin, T_1/2, α-branching ratios, yields at ISOLDE-CERN and SHIP-GSI facilities. ¹⁷⁹Tl, ¹⁷⁵Au, ¹⁷¹Ir, ¹⁶⁷Re; deduced levels, J, π. ^172,173,175Pt, ^176,177Hg, ¹⁷⁹Au(α); measured Eα. Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.87.054311
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2013AN13      Phys.Rev.Lett. 110, 242502 (2013)

A.N.Andreyev, M.Huyse, P.Van Duppen, C.Qi, R.J.Liotta, S.Antalic, D.Ackermann, S.Franchoo, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, P.Kuusiniemi, S.R.Lesher, B.Lommel, R.Mann, K.Nishio, R.D.Page, B.Streicher, S.Saro, B.Sulignano, D.Wiseman, R.A.Wyss

Signatures of the Z = 82 Shell Closure in α-Decay Process

RADIOACTIVITY ¹⁸⁶Po, ¹⁸²Pb, ¹⁷⁸Hg, ¹⁷⁴Pt(α) [from ¹⁴⁴Sm(⁴⁶Ti, X)¹⁹⁰Po, E=230 MeV, ¹⁹⁰Po(4n)]; measured decay products, Eα, Iα; deduced σ, identification of ¹⁸⁶Po, the α-particle formation probabilities.

doi: 10.1103/PhysRevLett.110.242502
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2013CO18      Eur.Phys.J. A 49, 112 (2013)

V.F.Comas, S.Heinz, S.Hofmann, D.Ackermann, J.A.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Study of multi-nucleon transfer reactions in ^{58, 64}Ni + ²⁰⁷Pb collisions at the velocity filter SHIP

NUCLEAR REACTIONS ²⁰⁷Pb(⁵⁸Ni, X), (⁶⁴Ni, X), E=4.80-5.92 MeV/nucleon; measured Eα, Iα from fragment α decay, reaction fragments. Po, At, Rn, Fr deduced isotopic yields (primary and secondary), Q value, σ. Compared with Zagrebaev's calculations and data from nearby reactions. ²⁰⁸Pb(⁶⁴Ni, X)²⁷¹Ds, E≈0; measured reaction products; deduced σ.

doi: 10.1140/epja/i2013-13112-x
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2013DR04      Eur.Phys.J. A 49, 13 (2013)

C.Droese, D.Ackermann, L.-L.Andersson, K.Blaum, M.Block, M.Dworschak, M.Eibach, S.Eliseev, U.Forsberg, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, G.Marx, E.Minaya Ramirez, D.Nesterenko, Yu.N.Novikov, W.R.Plass, D.Rodriguez, D.Rudolph, C.Scheidenberger, L.Schweikhard, S.Stolze, P.G.Thirolf, C.Weber

High-precision mass measurements of ^203-207Rn and ²¹³Ra with SHIPTRAP

NUCLEAR REACTIONS Dy(⁴⁸Ca, ²⁰⁴Rn), (⁴⁸Ca, ²⁰⁵Rn), (⁴⁸Ca, ²⁰⁶Rn), (⁴⁸Ca, ²⁰⁷Rn), E=4.4 MeV/nucleon;¹⁷⁰Er(⁴⁸Ca, ²¹³Ra), E=4.4 MeV;¹⁷⁰Er(⁴⁰Ar, ²⁰³Rn), (⁴⁰Ar, ²⁰⁴Rn), (⁴⁰Ar, ²⁰⁵Rn), E=4.7 MeV/nucleon;¹⁶⁰Gd(⁵⁰Ti, ²⁰⁴Rn), (⁴⁰Ar, ²⁰⁵Rn), (⁴⁰Ar, ²⁰⁶Rn), E=4.55 MeV/nucleon; measured evaporation residues, frequency ratio using tandem Penning trap spectrometer SHIPTRAP; deduced σ, mass excess, 2n separation energy; calculated σ using statistical model code HIVAP. Compared with AME; 2n separation energy compared with trends for Pb, Po, Rn, Ra.

ATOMIC MASSES ^{203,204,205,206,207}Rn, ²¹³Ra; measured frequency ratio, number of resonances; deduced mass. Compared with AME 2003.

doi: 10.1140/epja/i2013-13013-0
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2013KA16      Phys.Rev. C 87, 044335 (2013)

Z.Kalaninova, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.C.Drummond, S.Hofmann, M.Huyse, B.Kindler, J.F.W.Lane, V.Liberati, B.Lommel, R.D.Page, E.Rapisarda, K.Sandhu, S.Saro, A.Thornthwaite, P.Van Duppen

α decay of the very neutron-deficient isotopes ^197-199Fr

NUCLEAR REACTIONS ¹⁴¹Pr(⁶⁰Ni, xn)¹⁹⁷Fr/¹⁹⁸Fr/¹⁹⁹Fr, E=262-300 MeV; measured Eα, Eγ, (ER)α-, αα-correlations, time-of-flight, production σ using SHIP at GSI facility.

RADIOACTIVITY ^197,198,199Fr(α)[from ¹⁴¹Pr(⁶⁰Ni, X), E=262-300 MeV]; measured Eγ, Iγ, Eα, (ER)α-, αα-, αγ-coin, T_1/2 using SHIP at GSI facility. ^193,194,195At, ^189,190,191Bi(α)[from α decay of ^197,198,199Fr parents]; measured Eα, half-lives, αα correlations. ^197,198,199Fr, ^193,194,195At, ^189,190Bi, ¹⁸⁵Tl; deduced levels, J, π, isomers, configurations, reduced α-decay width. ^197,198,199Rn, ¹⁹⁷At, ^{193,194,195,196}Po(α); observed α peaks in spectra. Systematics of α-decay reduced widths for 1/2+ to 1/2+, 7/2- to 7/2-, and 9/2- to 9/2- α transitions in N=105-135, odd-A At, Fe and even-A Rn isotopes.

doi: 10.1103/PhysRevC.87.044335
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2013LA02      Phys.Rev. C 87, 014318 (2013)

J.F.W.Lane, A.N.Andreyev, S.Antalic, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, H.Kettunen, A.Kleinbohl, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, G.Munzenberg, K.Nishio, R.D.Page, S.Saro, H.Schaffner, M.J.Taylor, P.Van Duppen

β-delayed fission of ^{186, 188}Bi isotopes

RADIOACTIVITY ¹⁸⁸Bi(β⁺F)[from ¹⁴²Nd(⁵⁰Cr, 3np), E=252 MeV]; ¹⁸⁶Bi(β⁺F)[from ¹⁴⁴Sm(⁴⁶Ti, 3np), E=239 MeV]; measured α, particle and fission fragment spectra, T_1/2 using recoil-fission correlation technique at SHIP facility in GSI. ^186,188Pb; deduced estimates of beta-delayed fission (βDF) probabilities. Comparison with β-delayed fission probabilities for ¹⁹²At, ²⁴⁶Md.

doi: 10.1103/PhysRevC.87.014318
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2013RU11      Phys.Rev.Lett. 111, 112502 (2013)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, F.P.Hessberger, R.-D.Herzberg, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Spectroscopy of Element 115 Decay Chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α) [from ²⁴³Am(⁴⁸Ca, X), E=5.4 MeV/nucleon]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays. ²⁸⁰Rg, ²⁷⁶Mt; deduced T_1/2, Q-value, α-decay scheme. Comparison with Monte Carlo calculations.

doi: 10.1103/PhysRevLett.111.112502
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2012AC04      Prog.Theor.Phys.(Kyoto), Suppl. 196, 255 (2012)

D.Ackermann

Superheavy Elements - A Probe for Nuclear Matter at the Extremes

RADIOACTIVITY ²⁷⁰Ds, ²⁶⁶Hs, ²⁶²Sg(α); analyzed experimental data; deduced decay and level scheme. Hartree-Fock-Bogoliubov, two centers shell model calculations.

doi: 10.1143/PTPS.196.255
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2012CO22      Eur.Phys.J. A 48, 180 (2012)

V.Comas, S.Heinz, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Observation of rotating nuclear molecules and determination of their lifetimes

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X), E=5.92 MeV/nucleon; measured reaction fragments energy and angular distributions using SHIP velocity filter; calculated DNS (double nuclear system) T_1/2 as function of peaks in angular distributions. ^212mAt, ²¹³Rn, ²¹³Fr, ²¹⁵Ra deduced σ(θ) vs cm velocity, TKE, T_1/2 from the peaks of σ(θ).

doi: 10.1140/epja/i2012-12180-8
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2012FO03      Acta Phys.Pol. B43, 305 (2012)

U.Forsberg, P.Golubev, L.G.Sarmiento, J.Jeppsson, D.Rudolph, L.-L.Andersson, D.Ackermann, M.Asai, M.Block, K.Eberhardt, J.Even, Ch.E.Dullmann, J.Dvorak, J.M.Gates, K.E.Gregorich, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, E.Merchan, J.P.Omtvedt, E.Parr, J.Runke, H.Schaffner, M.Schadel, A.Yakushev

First Experiment at TASCA Towards X-Ray Fingerprinting of Element 115 Decay Chains

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=4.59 MeV/nucleon; measured reaction fusion-evaporation products; deduced distribution of evaporation residue. Comparison with theoretical calculations.

doi: 10.5506/APhysPolB.43.305
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2012HE05      Eur.Phys.J. A 48, 32 (2012)

S.Heinz, S.Hofmann, V.Comas, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

The source of "background" fission events in experiments on superheavy elements

NUCLEAR REACTIONS ²³⁸U(⁶⁴Ni, F), (⁶⁴Ni, X), E=5.53 MeV/nucleon;²⁴⁸Cm(⁴⁸Ca, F), (⁴⁸Ca, X), (⁵⁴Cr, F), (⁵⁴Cr, X), E=5.53 MeV/nucleon; measured E(heavy fragment), I(heavy fragment); deduced σ, σ(θ) vs fragment velocity.

doi: 10.1140/epja/i2012-12032-7
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2012HE09      Eur.Phys.J. A 48, 75 (2012)

F.P.Hessberger, S.Antalic, D.Ackermann, Z.Kalaninova, S.Heinz, S.Hofmann, B.Streicher, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano, M.Venhart

Alpha-gamma decay studies of ²⁵³No and its daughter products ²⁵³Md , ²⁴⁹Fm

RADIOACTIVITY ²⁵³No(α), (β⁺), (EC)[from ²⁰⁷Pb(⁴⁸Ca, 2n)], ²⁴⁹Fm, ²⁵³Md(α)[from ²⁵³No]; measured Eα, Iα, Eγ, Iγ, αγ-coin, ER. ²⁴⁹Es, ²⁴⁹Fm, ²⁵³Md, ²⁵³No deduced levels, J, π, γ transitions, α branching ratios calculated α-decay spectrum using GEANT4. Compared with data.

doi: 10.1140/epja/i2012-12075-8
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2012HO12      Eur.Phys.J. A 48, 62 (2012)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, J.Khuyagbaatar, D.Ackermann, S.Antalic, W.Barth, M.Block, H.G.Burkhard, V.F.Comas, L.Dahl, K.Eberhardt, J.Gostic, R.A.Henderson, J.A.Heredia, F.P.Hessberger, J.M.Kenneally, B.Kindler, I.Kojouharov, J.V.Kratz, R.Lang, M.Leino, B.Lommel, K.J.Moody, G.Munzenberg, S.L.Nelson, K.Nishio, A.G.Popeko, J.Runke, S.Saro, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, P.A.Wilk, A.V.Yeremin

The reaction ⁴⁸Ca + ²⁴⁸Cm → ²⁹⁶116^* studied at the GSI-SHIP

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, X)²⁹²Lv/²⁹³Lv, E=265.4, 270.2 MeV; measured reaction products, Eα, Iα(t) from 116 decay, 116 fission using SHIP velocity filter. ^288,289Fl, ^284,285Cn, ²⁸¹Ds, ²⁷⁷Hs; deduced σ, T_1/2, ground state quadrupole deformation, quasiparticle excitations, Q-values for different α decay chains. Comparison with other data.

doi: 10.1140/epja/i2012-12062-1
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0938.

2012KH11      Phys.Rev. C 86, 064602 (2012)

J.Khuyagbaatar, K.Nishio, S.Hofmann, D.Ackermann, M.Block, S.Heinz, F.P.Hessberger, K.Hirose, H.Ikezoe, B.Kinlder, B.Lommel, H.Makii, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, Y.Wakabayashi, S.Yan

Evidence for hindrance in fusion between sulfur and lead nuclei

NUCLEAR REACTIONS ^204,206,208Pb(³⁴S, F), (³⁶S, F), E=160-200 MeV; measured fission fragments, fission and ER σ at JAEA facility. Comparison with coupled-channel (HIVAP) calculations. Influence of coupling to the vibrational states in ³⁴S.

doi: 10.1103/PhysRevC.86.064602
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2012MI27      Science 337, 1207 (2012)

E.Minaya-Ramirez, D.Ackermann, K.Blaum, M.Block, C.Droese, C.E.Dullmann, M.Dworschak, M.Eibach, S.Eliseev, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, G.Marx, M.Mazzocco, D.Nesterenko, Y.N.Novikov, W.R.Plass, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, C.Weber

Direct Mapping of Nuclear Shell Effects in the Heaviest Elements

ATOMIC MASSES ^{252,253,254,255}No, ^255,256Lr; measured time-of-flight ion-cyclotron-resonance; deduced frequency ratios, mass excess. Comparison with theoretical calculations, SHIPTRAP results.

doi: 10.1126/science.1225636
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2012SA46      Nucl.Phys. A893, 1 (2012)

E.Sahin, G.de Angelis, G.Duchene, T.Faul, A.Gadea, A.F.Lisetskiy, D.Ackermann, A.Algora, S.Aydin, F.Azaiez, D.Bazzacco, G.Benzoni, M.Bostan, T.Byrski, I.Celikovic, R.Chapman, L.Corradi, S.Courtin, D.Curien, U.Datta Pramanik, F.Didierjean, O.Dorvaux, M.N.Erduran, S.Erturk, E.Farnea, E.Fioretto, G.de France, S.Franchoo, B.Gall, A.Gottardo, B.Guiot, F.Haas, F.Ibrahim, E.Ince, A.Khouaja, A.Kusoglu, G.La Rana, M.Labiche, D.Lebhertz, S.Lenzi, S.Leoni, S.Lunardi, P.Mason, D.Mengoni, C.Michelagnoli, V.Modamio, G.Montagnoli, D.Montanari, R.Moro, B.Mouginot, D.R.Napoli, D.O'Donnell, J.R.B.Oliveira, J.Ollier, R.Orlandi, G.Pollarolo, F.Recchia, J.Robin, M.-D.Salsac, F.Scarlassara, R.P.Singh, R.Silvestri, J.F.Smith, I.Stefan, A.M.Stefanini, K.Subotic, S.Szilner, D.Tonev, D.A.Torres, M.Trotta, P.Ujic, C.Ur, J.J.Valiente-Dobon, D.Verney, M.Yalcinkaya, P.T.Wady, K.T.Wiedemann, K.Zuber

Structure of the N=50 As, Ge, Ga nuclei

NUCLEAR REACTIONS ²³⁸U(⁸²Se, ⁸¹Ga), (⁸²Se, ⁸²Ge), (⁸²Se, ⁸³As), E=515 MeV; measured Eγ, Iγ(θ), γγ-coin, reaction fragments, (fragment)γ-coin using PRISMA magnetic spectrometer and γ after deexcitation using Ge Compton-suppressed detectors of CLARA array, thin and thick target. ⁸¹Ga, ⁸²Ge, ⁸³As; deduced σ(θ), levels, J, π; calculated levels, J, π using shell model.

doi: 10.1016/j.nuclphysa.2012.08.007
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2012SU22      Phys.Rev. C 86, 044318 (2012)

B.Sulignano, Ch.Theisen, J.-P.Delaroche, M.Girod, J.Ljungvall, D.Ackermann, S.Antalic, O.Dorvaux, A.Drouart, B.Gall, A.Gorgen, P.T.Greenlees, K.Hauschild, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, W.Korten, M.Leino, A.Lopez-Martens, M.Nyman, A.Obertelli, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, J.Piot, P.Rahkila, D.Rostron, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, M.Venhart, M.Zielinska

Investigation of high-K states in ²⁵²No

NUCLEAR REACTIONS ²⁰⁶Pb(⁴⁸Ca, 2n), E=218 MeV; measured Eγ, Iγ, γγ-, γ(ce)-coin, E(ce), I(ce), Eα, isomer half-life using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla facility. ²⁵²No; deduced levels, J, π, rotational bands, configuration, high-K states, hindrance factors. ²⁵⁰Fm, ²⁵²No; systematics of dynamic moments of inertia and proton pairing energies. Comparison with Hartree-Fock-Bogoliubov (HFB) mean-field calculations.

RADIOACTIVITY ²⁵²No(α), (SF); measured Eα, Iα, (evaporation residues)α correlations, half-life, branching ratios for decay modes. ²⁴⁴Cf, ^248,250Fm, ^253,254No(α); measured α spectrum.

doi: 10.1103/PhysRevC.86.044318
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2011AC01      Acta Phys.Pol. B42, 577 (2011)

D.Ackermann

Superheavy Elements at GSI - Investigating Exotic Nuclear Matter

RADIOACTIVITY ²⁷⁰Ds, ²⁶⁶Hs(α), ²⁶²Sg(SF); measured decay fragments, alpha spectrum; deduced T_1/2, J, π. Comparison with HFB calculations.

doi: 10.5506/APhysPolB.42.577
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2011AN13      Eur.Phys.J. A 47, 62 (2011)

S.Antalic, F.P.Hessberger, D.Ackermann, S.Heinz, S.Hofmann, Z.Kalaninova, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Streicher, B.Sulignano, M.Venhart

Isomeric states in ²⁵³No and ²⁵³Fm

RADIOACTIVITY ²⁵³Md, ²⁵³No(EC), (β⁺)[from ²⁰⁷Pb(⁴⁸Ca, 2n), E=218.4 MeV]; measured Eα, Iα, Eγ, Iγ(t), delayed αγ-coin, X-rays, Ex, Ix(t), Xγ-coin, βγ-coin, γγ-coin. ²⁵³No deduced isomer decay T_1/2, transition multipolatirities, levels, rotational band, ICC. ²⁵³Fm deduced levels, J, π, ICC, isomeric transition.

doi: 10.1140/epja/i2011-11062-y
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2011GA19      Phys.Rev. C 83, 054618 (2011)

J.M.Gates, Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, U.Forsberg, J.Gellanki, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, H.Schaffner, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the ²⁴⁴Pu(⁴⁸Ca, 3-4n) reaction

NUCLEAR REACTIONS ²⁰⁶Pb(⁴⁸Ca, 2n)²⁵²No, E=231.2 MeV; ²⁰⁷Pb(⁴⁸Ca, 2n)²⁵³No, E=231.2 MeV; ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=231.2 MeV; ²⁴⁴Pu(⁴⁸Ca, 3n)²⁸⁹Fl, E=254.6, 259.4 MeV; ²⁴⁴Pu(⁴⁸Ca, 4n)²⁸⁸Fl, E=254.6, 259.4 MeV; measured evaporation residue spectra, Eα, Iα, fission fragment spectra, Eγ, αγ-, α(particle)-coin, production cross sections. TASCA recoil separator at GSI. Comparison with previous measurements. RADIOACTIVITY ^252,253,254No, ^288,289Fl(α), (SF); measured Eα, half-lives, branching ratios for α and SF decay modes, (evaporation residues)α- and (evaporation residues)(fission fragments)-correlations, αγ-, γ(SF events)-coin. ²⁴⁸Fm, ²⁸¹Ds, ^284,285Cn, (α); measured Eα, EVR-α-α correlations, Eγ, half-lives. ²⁷⁷Hs(SF); measured total kinetic energy (TKE), half-life.

doi: 10.1103/PhysRevC.83.054618
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2011HA08      Phys.Rev.Lett. 106, 122501 (2011)

E.Haettner, D.Ackermann, G.Audi, K.Blaum, M.Block, S.Eliseev, T.Fleckenstein, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, S.Rahaman, T.Rauscher, D.Rodriguez, H.Schatz, C.Scheidenberger, L.Schweikhard, B.Sun, P.G.Thirolf, G.Vorobjev, M.Wang, C.Weber

Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

ATOMIC MASSES ⁸¹Rb, ^80,81,84Sr, ⁸⁶Zr, ⁸⁵Nb, ^85,86,87Mo, ⁸⁷Tc; measured frequency ratios; deduced masses, proton separation energies, possible limitations for rp astrophysical process. Comparison with AME03, Penning trap mass measurement.

doi: 10.1103/PhysRevLett.106.122501
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2011KA30      Phys.Rev. C 84, 054607 (2011)

Sh.A.Kalandarov, G.G.Adamian, N.V.Antonenko, W.Scheid, S.Heinz, V.Comas, S.Hofmann, J.Khuyagbaatar, D.Ackermann, J.Heredia, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann

Emission of clusters with Z > 2 from excited actinide nuclei

NUCLEAR REACTIONS ²⁰⁶Pb(²⁵Mg, X)²¹¹Po/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹¹Rn/²¹²Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹³Fr/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra/²¹⁴Th/²¹⁵Th/²¹⁶Th/²¹⁷Th/²¹⁸Th, E=5.9, 6.3, 8.7 MeV/nucleon; Pt(³⁶S, X)²⁰⁷Rn/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹³Fr/²¹⁰Ra/²¹¹Ra/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra, E=5.30, 5.50, 5.96 MeV/nucleon; W(⁴⁸Ca, X)²⁰⁷Rn/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹⁰Ra/²¹¹Ra/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra/²¹⁹Th/²²⁰Th/²²¹Th/²²²Th/²²³Th, E=5.41 MeV/nucleon; measured Eα, Iα, cross sections, charge, and isotopic distributions of the residual heavy nuclei, velocity spectra using SHIP filter at GSI. Emission of complex fragments with Z>2 Comparison with theoretical calculations using dinuclear system model.

doi: 10.1103/PhysRevC.84.054607
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2011VE03      Eur.Phys.J. A 47, 20 (2011)

M.Venhart, F.P.Hessberger, D.Ackermann, S.Antalic, C.Gray-Jones, P.T.Greenlees, S.Heinz, R.-D.Herzberg, S.Hofmann, S.Ketelhut, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, R.Mann, P.Papadakis, D.Rostron, D.Rudolph, S.Saro, B.Sulignano

Decay study of ²⁴⁶Fm at SHIP

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁰Ar, 2n), E=186.4 MeV; measured E(particle), I(particle, θ), Eα, Iα(t), E(CE), I(CE), Eγ, Iγ, X-rays, αβ-coin, αγ-coin, (ER)α-coin, (fragment)γ-coin. ²⁴⁶Fm calculated two-quasineutron levels, J, π using Woods-Saxon and self-consistent mean field with Gogny forces, T_1/2 for high-K states; deduced T_1/2, spontaneous fission T_1/2, α, SF, EC branching ratio, two-quasineutron levels. ²⁴²Cf deduced α, EC branching ratio.

doi: 10.1140/epja/i2011-11020-9
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2010AN01      J.Phys.(London) G37, 035102 (2010)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antila, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

The new isotope ¹⁷⁹Pb and α-decay properties of ¹⁷⁹Tl^m

RADIOACTIVITY ¹⁷⁹Tl, ¹⁷⁵Au, ¹⁷⁹Pb(α) [from ¹⁴⁴Sm(⁴⁰Ca, 5n), E=232 MeV]; measured Eα, Iα; deduced T_1/2, J, π.

RADIOACTIVITY ¹⁷²Pt(α); measured decay products, Eα, Iα; deduced %α branch.

doi: 10.1088/0954-3899/37/3/035102
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2010AN08      Eur.Phys.J. A 43, 35 (2010)

S.Antalic, F.P.Hessberger, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, S.Saro

Studies of neutron-deficient mendelevium isotopes at SHIP

NUCLEAR REACTIONS ²⁰⁹Bi(⁴⁰Ar, 2n), (⁴⁰Ar, 3n), E=187, 198 MeV; measured Eγ, Iγ, Eα, Iα, αγ-, αα-coin; deduced σ. ²⁴²Es, ²⁴³Es, ²⁴⁶Fm, ^246,247Md; deduced levels, J, π, Q, branching ratios, T_1/2. Comparison with other data and calculations.

RADIOACTIVITY ^242,243Es, ^246,247Md(α), (SF); ²⁴⁶Md(EC) [from ²⁰⁹Bi(⁴⁰Ar, 2n), (⁴⁰Ar, 3n), E=187, 198 MeV and subsequent decays]; measured Eγ, Iγ, Eα, Iα, αγ-, αα-coin; deduced Q, branching ratios, T_1/2. Comparison with other data and calculations.

doi: 10.1140/epja/i2009-10896-0
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2010BL03      Hyperfine Interactions 196, 225 (2010)

M.Block, D.Ackermann, K.Blaum, C.Droese, M.Dworschak, M.Eibach, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, C.Weber

Penning trap mass measurements of transfermium elements with SHIPTRAP

ATOMIC MASSES ^252,253,254No; measured cyclotron resonance curves; deduced masses.

doi: 10.1007/s10751-010-0161-z
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2010BL04      Nature(London) 463, 785 (2010)

M.Block, D.Ackermann, K.Blaum, C.Droese, M.Dworschak, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, C.Weber

Direct mass measurements above uranium bridge the gap to the island of stability

ATOMIC MASSES ^252,253,254No; measured masses by Penning-trap method at GSI, using ¹³³Cs as standard.

doi: 10.1038/nature08774
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2010DU06      Phys.Rev.Lett. 104, 252701 (2010)

Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, J.M.Gates, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Production and Decay of Element 114: High Cross Sections and the New Nucleus ²⁷⁷Hs

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, 3n)²⁸⁹Fl, ²⁴⁴Pu(⁴⁸Ca, 4n)²⁸⁸Fl, E=259.4, 254.6 MeV; measured reaction products, Eα, Iα; deduced σ, α-decay chains, T_1/2.

RADIOACTIVITY ^288,289Fl, ²⁸⁵Cn(α), ²⁸¹Ds(α), ²⁸⁴Cn, ²⁸¹Ds, ²⁷⁷Hs(SF); measured reaction products, Eα, Iα; deduced α-decay chains, T_1/2.

doi: 10.1103/PhysRevLett.104.252701
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2010DW01      Phys.Rev. C 81, 064312 (2010)

M.Dworschak, M.Block, D.Ackermann, G.Audi, K.Blaum, C.Droese, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, M.Wang, C.Weber

Penning trap mass measurements on nobelium isotopes

ATOMIC MASSES ^252,253,254No; measured cyclotron frequencies using SHIPTRAP Penning-trap system; deduced mean frequency ratios and mass excesses. Comparison with AME2003 and re-evaluation.

ATOMIC MASSES ²³²U, ^236,238Pu, ^240,241,242Cm, ^244,245,246Cf, ^248,249,250Fm, ^252,253,254No, ^256,257,258Rf, ^260,261,262Sg, ^264,265,266Hs, ^268,269,270Ds; compiled and evaluated mass excesses.

NUCLEAR REACTIONS ^206,207,208Pb(⁴⁸Ca, 2n)²⁵²No/²⁵³No/²⁵⁴No, E=4.55 MeV/nucleon; measured production σ.

doi: 10.1103/PhysRevC.81.064312
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2010GR04      Phys.Rev. C 81, 061601 (2010)

R.Graeger, D.Ackermann, M.Chelnokov, V.Chepigin, Ch.E.Dullmann, J.Dvorak, J.Even, A.Gorshkov, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, A.Kuznetsov, B.Lommel, K.Nishio, H.Nitsche, J.P.Omtvedt, O.Petrushkin, D.Rudolph, J.Runke, F.Samadani, M.Schadel, B.Schausten, A.Turler, A.Yakushev, Q.Zhi

Experimental study of the ²³⁸U(³⁶S, 3-5n)^269-271Hs reaction leading to the observation of ²⁷⁰Hs

NUCLEAR REACTIONS ²³⁸U(³⁶S, 3n), (³⁶S, 4n), (³⁶S, 5n), E=256.4 MeV; measured reaction products using COMPACT system of efficient and rapid chemical-separation and online detection based on the cryo-thermo chromatography method. ^269,270,271Hs; deduced production σ.

RADIOACTIVITY ^269,270,271Hs, ^265,267Sg(α); measured decay products, Iα, Eα; deduced T_1/2, αα correlations; ^261,263Rf, ²⁶⁴Sg(SF); measured decay products, Eα, Iα; deduced α-SF correlations.

doi: 10.1103/PhysRevC.81.061601
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2010HE10      Eur.Phys.J. A 43, 55 (2010)

F.P.Hessberger, S.Antalic, B.Sulignano, D.Ackermann, S.Heinz, S.Hofmann, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, A.G.Popeko, S.Saro, B.Streicher, J.Uusitalo, M.Venhart, A.V.Yeremin

Decay studies of K isomers in ²⁵⁴No

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n), E=213.6, 218.4 MeV; measured Eγ, Iγ, Eα, Iα, E(ce), I(ce), γγ-, γ(ce)-coin. ²⁵⁴No; deduced branching ratios, bands, levels, J, π, T_1/2, configurations.

RADIOACTIVITY ²⁵⁴Md, ²⁵⁴No(α), (EC) [from ²⁰⁸Pb(⁴⁸Ca, 2n), E=213.6, 218.4 MeV]; measured Eγ, Iγ, Eα, Iα, E(ce), I(ce), γγ-, γ(ce)-coin; deduced branching ratios, bands, levels, J, π, T_1/2, configurations.

doi: 10.1140/epja/i2009-10899-9
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2010HE11      Eur.Phys.J. A 43, 175 (2010)

F.P.Hessberger, S.Antalic, D.Ackermann, S.Heinz, S.Hofmann, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann

Alpha-decay properties of ²⁶¹Bh

RADIOACTIVITY ²⁵³Lr, ²⁵⁷Db, ²⁶¹Bh(α) [²⁰⁹Bi(⁵⁴Cr, 2n), E=271 MeV]; measured Eα, Iα, Eγ, αγ-coin; calculated T_1/2, hindrance factors. ²⁵⁷Db, ²⁶¹Bh; deduced levels, J, π.

doi: 10.1140/epja/i2010-10913-3
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2010HE12      Eur.Phys.J. A 43, 181 (2010)

S.Heinz, V.Comas, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Investigation of di-nuclear systems as entrance channel to fusion

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X)²¹¹Po/²¹²At/²¹³Rn/²¹³Fr/²¹⁴Ra, E=4.80, 5.00, 5.20, 5.40, 5.53, 5.92 MeV/nucleon; measured σ(θ), E(residue) using the SHIP facility.

doi: 10.1140/epja/i2010-10914-2
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2010HE14      Nucl.Phys. A834, 362c (2010)

S.Heinz, V.Comas, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann, C.Golabek, W.Mittig, F.Rejmund, A.C.C.Villari

Study of heavy di-nuclear systems

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X)²¹¹Po/²¹²At/²¹³Rn/²¹³Fr/²¹⁴Ra, E=4.80, 5.00, 5.20, 5.40, 5.53, 5.92 MeV/nucleon; measured Eα, Iα, σ(θ), yields, fragment energy spectra (TKE) using SHIP velocity filter. ²³⁸U(²³⁸U, X), E=6.09, 6.49, 6.91, 7.10, 7.35 MeV/nucleon; measured σ(θ), mass distributions, yields, fragment energy spectra (TKE) using VAMOS spectrometer; deduced interaction times using diffusion model.

doi: 10.1016/j.nuclphysa.2010.01.040
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2010HE25      Eur.Phys.J. A 46, 337 (2010)

J.A.Heredia, A.N.Andreyev, S.Antalic, S.Hofmann, D.Ackermann, V.F.Comas, S.Heinz, F.P.Hessberger, B.Kindler, J.Khuyagbaatar, B.Lommel, R.Mann

The new isotope ²⁰⁸Th

NUCLEAR REACTIONS ¹⁴⁷Sm(⁶⁴Ni, 2n), E=288 MeV;¹⁴⁷Sm(⁶⁴Ni, 3n), E=288, 294 MeV;¹⁵⁰Sm(⁶⁴Ni, 4n), E=294 MeV;¹⁵²Sm(⁶⁴Ni, 4n), E=288 MeV; measured Eα, Iα(t). ^{208,209,210,212}Th deduced α decay widths, T_1/2, α decay chains, ²⁰⁸Th new isotope. Comparison with other data.

doi: 10.1140/epja/i2010-11058-1
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2010KH06      Eur.Phys.J. A 46, 59 (2010)

J.Khuyagbaatar, F.P.Hessberger, S.Hofmann, D.Ackermann, V.S.Comas, S.Heinz, J.A.Heredia, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, K.Nishio, A.Yakushev

The new isotope ²³⁶Cm and new data on ²³³Cm and ^{237, 238, 240}Cf

NUCLEAR REACTIONS ^204,206,207Pb(³⁶Si, 2n), (³⁶Si, 3n), E=163.6, 170.3 MeV; measured Eα, Iα, evaporation residues, Eγ, Iγ, X-rays, (particle)γ-coin, (particle)X-coin. ^{237,238,239,240,241}Cf deduced σ.

RADIOACTIVITY ^237,238,240Cf(SF), (α); measured Eα, Iα, delayed αα-coin, TKE; deduced spontaneous fission T_1/2. ^237,240Cf deduced mass excess. ^238,240Cf deduced α-decay T_1/2. ^233,236Cm(α), (EC)[from Cf α decay]; measured Eα, Iα, Iβ; deduced α-decay T_1/2, α-branching. ²³⁶Cm deduced mass excess, spontaneous fission T_1/2. ²²⁹Pu(α); measured Eα, Iα(t); deduced T_1/2.

doi: 10.1140/epja/i2010-11026-9
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2010NI14      Phys.Rev. C 82, 024611 (2010)

K.Nishio, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, A.Gorshkov, R.Graeger, K.Hagino, S.Heinz, J.A.Heredia, K.Hirose, H.Ikezoe, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, S.Mitsuoka, Y.Nagame, I.Nishinaka, T.Ohtsuki, A.G.Popeko, S.Saro, M.Schadel, A.Turler, Y.Watanabe, A.Yakushev, A.V.Yeremin

Nuclear orientation in the reaction ³⁴S+²³⁸U and synthesis of the new isotope ²⁶⁸Hs

NUCLEAR REACTIONS ²³⁸U(³⁴S, xn)²⁶⁷Hs/²⁶⁸Hs, E=148-170 MeV; measured evaporation residues and Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, production σ, fission σ(E), mass distribution of fission fragments as a function of energy. Comparison of fission σ(E) with calculations based on the three-dimensional Langevin equation and deformed target nuclei. Coupled-channel calculations for mass distributions. ^268,269Sg, ^272,273Hs, ^269,271,272Mt, ^{274,275,276,277}Sg, ^273,275,276Rg, ^{278,279,280,281}Cn; theoretical estimates of production rates in ²⁴³Am, ²⁴⁴Pu, ²⁴⁸Cm(³⁴S, xn), (³⁶S, xn) reactions.

RADIOACTIVITY ^267,268Hs(α)[from ²³⁸U(³⁴S, X), E=163.0 MeV]; ²⁶³Sg, ²⁵⁹Rf(α); ²⁶⁴Sg(SF); measured Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, half-lives; deduced Qα. Systematics of Qα values for even-even Z=104-114 and N=150-170 nuclei.

doi: 10.1103/PhysRevC.82.024611
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2010ST14      Eur.Phys.J. A 45, 275 (2010)

B.Streicher, F.P.Hessberger, S.Antalic, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, S.Saro, B.Sulignano, J.Uusitalo, M.Venhart

Alpha-gamma decay studies of ²⁶¹Sg and ²⁵⁷Rf

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), E=254-281 MeV; ²⁰⁸Pb(⁵⁴Cr, 2n), E=258 MeV; measured E(residue), I(residue, θ), Eα, Iα(θ), Eγ, Iγ; deduced σ.

RADIOACTIVITY ²⁵⁵Fm, ²⁵⁷No, ²⁵⁷Rf, ²⁶¹Sg(α); measured Eα, Iα, Eγ, Iγ, γγ-coin, αγ-coin, E(K X-rays). ²⁵¹Cf, ²⁵³Fm, ²⁵⁷Rf deduced levels, J, π; ²⁵⁷Rf isomer deduced T_1/2, decay scheme.

COMPILATION N=151, 153; compiled low-lying Nilsson levels; compared to Parkhomenko's calculations.

doi: 10.1140/epja/i2010-11005-2
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2009AN09      Acta Phys.Pol. B40, 763 (2009)

S.Antalic, F.P.Hessberger, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano, M.Venhart

Study of K-Isomers in Odd-Mass Nuclei at SHIP

2009AN11      Phys.Rev. C 79, 064320 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, L.Bianco, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, K.Nishio, R.D.Page, J.J.Ressler, P.Sapple, B.Streicher, S.Saro, B.Sulignano, J.Thomson, P.Van Duppen, M.Venhart

α decay of ¹⁹⁴At

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, xn)¹⁹³Po/^193mPo/¹⁹³At/¹⁹⁴At/^194mAt/¹⁹⁵At, E=259 MeV]; measured Eα, Iα, recoil-α-α and α-γ correlations.

RADIOACTIVITY ^194,194mAt(α), ^190,190mBi(α)[from ¹⁴¹Pr(⁵⁶Fe, 3n), E=259 MeV]; measured Eα, Iα, Eγ, Iγ, γγ-, αγ-coin, isomer half-lives, recoil-α-α correlations. ¹⁹⁰Bi, ¹⁹⁴At; deduced levels, J, π, multipolarity, hindrance factors, configurations. ¹⁹³Po, ^193,195At(α); measured Eα.

doi: 10.1103/PhysRevC.79.064320
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2009AN14      Phys.Rev. C 80, 024302 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antila, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

Decay of the 9/2^- isomer in ¹⁸¹Tl and mass determination of low-lying states in ¹⁸¹Tl, ¹⁷⁷Au, and ¹⁷³Ir

RADIOACTIVITY ¹⁸¹Tl, ¹⁷⁷Au(α) [from ¹⁴⁴Sm(⁴⁰Ca, 2np)]; measured Eα, Iα, Eγ, Iγ, γγ-, αγ-coin, α-α correlations and half-lives; deduced branching ratios and hindrance factors. ¹⁷³Ir, ¹⁷⁷Au, ¹⁸¹Tl; deduced levels, J, π, isomers. ¹⁷³Ir, ^173mIr, ¹⁷⁷Au, ^177mAu, ¹⁸¹Tl, ^181mTl, ¹⁸⁵Bi; deduced mass excesses. Level energy systematics of odd-A Tl isotopes.

doi: 10.1103/PhysRevC.80.024302
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