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NSR database version of April 27, 2024.

Search: Author = R.Graeger

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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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2013OG03      Phys.Rev. C 87, 034605 (2013)

Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, S.N.Dmitriev, R.Graeger, R.A.Henderson, M.G.Itkis, Yu.V.Lobanov, A.N.Mezentsev, K.J.Moody, S.L.Nelson, A.N.Polyakov, M.A.Ryabinin, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, K.Subotic, A.M.Sukhov, Yu.S.Tsyganov, A.Turler, A.A.Voinov, G.K.Vostokin, P.A.Wilk, A.Yakushev

Synthesis and study of decay properties of the doubly magic nucleus ²⁷⁰Hs in the ²²⁶Ra + ⁴⁸Ca reaction

NUCLEAR REACTIONS ²²⁶Ra(⁴⁸Ca, 4n)²⁷⁰Hs, E=229, 234, 241 MeV; measured reaction products, σ(E), ER-α correlations using U400 cyclotron and Dubna gas-filled recoil separator at FLNR, JINR facility. Relatively high production cross section due to high fission barrier arising from nuclear shell effects.

RADIOACTIVITY ²⁷⁰Hs(α)[from ²²⁶Ra(⁴⁸Ca, 4n), E=229, 234, 241 MeV]; ²⁶⁶Sg(SF)[from ²⁷⁰Hs α decay]; measured Eα, evaporation residues-α correlations, T_1/2. Comparison with previous studies. Systematics of α decay and SF half-lives for N=148-172 No, Rf, Sg, and Hs nuclei.

doi: 10.1103/PhysRevC.87.034605
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0947. Data from this article have been entered in the XUNDL database. For more information, click here.

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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0910. Data from this article have been entered in the XUNDL database. For more information, click here.

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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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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0873.

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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0736. Data from this article have been entered in the XUNDL database. For more information, click here.