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NSR database version of April 11, 2024.

Search: Author = N.T.Brewer

Found 75 matches.

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2023BR07      Nucl.Phys. A1039, 122738 (2023)

N.T.Brewer, E.H.Wang, W.A.Yzaguirre, J.H.Hamilton, K.Nomura, A.V.Ramayya, S.H.Liu, J.K.Hwang, B.M.Musangu, J.M.Eldridge, C.J.Zachary, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, C.Goodin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Octupole deformation in 143, 145, 146Ba

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 143,145,146Ba; deduced γ-ray energies and relative intensities, partial level scheme, angular correlations, octupole bands, J, π, B(E1)/B(E2). Comparison with IBM and IBFM calculations.

doi: 10.1016/j.nuclphysa.2023.122738
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2023HA16      Nucl.Data Sheets 189, 224 (2023)

L.Hariasz, P.C.F.Di Stefano, M.Stukel, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, R.K.Grzywacz, E.D.Lukosi, D.W.Stracener, M.Mancuso, F.Petricca, J.Ninkovic, P.Lechner

Precision measurement of 65Zn electron-capture decays with the KDK coincidence setup

RADIOACTIVITY 65Zn(EC); measured decay products, X-rays, Eγ, Iγ, Eβ, Iβ; deduced the absolute emission intensity of 1115 keV γ-rays, the total EC0 branching ratio, decay scheme. Comparison with NNDC values. Modular Total Absorption Spectrometer (MTAS).

doi: 10.1016/j.nds.2023.04.003
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2023HA25      Phys.Rev. C 108, 014327 (2023)

L.Hariasz, M.Stukel, P.C.F.Di Stefano, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, D.W.Stracener, Y.Liu, Z.Gai, C.Rouleau, J.Carter, J.Kostensalo, J.Suhonen, H.Davis, E.D.Lukosi, K.C.Goetz, R.K.Grzywacz, M.Mancuso, F.Petricca, A.Fijalkowska, M.Wolinska-Cichocka, J.Ninkovic, P.Lechner, R.B.Ickert, L.E.Morgan, P.R.Renne, I.Yavin, for the KDK Collaboration

Evidence for ground-state electron capture of 40K

RADIOACTIVITY 40K(EC); measured decay products, X-rays, Eγ, Iγ; deduced EC0/EC* relative branching ratios to the ground state and excited state of 40Ar, T1/2, decay scheme. First experimental verification of a third-forbidden unique transition. Discussed the impact of found evidence of the 40K decay to the ground-sate on the geochronology and nuclear theory. Comparison to theoretical estimations. Sensitive x-ray silicon drift detector (SDD) and Modular Total Absorption Spectrometer (MTAS).

doi: 10.1103/PhysRevC.108.014327
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2023WO01      Phys.Rev. C 107, 034303 (2023)

M.Wolinska-Cichocka, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, A.Fijalkowska, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, S.Go, B.Heffron, J.Johnson, T.T.King, J.T.Matta, K.Miernik, M.Madurga, E.A.McCutchan, D.Miller, C.D.Nesaraja, S.V.Paulauskas, M.M.Rajabali, S.Taylor, A.A.Sonzogni, E.H.Wang, J.A.Winger, Y.Xiao, C.J.Zachary

Complete β-decay patterns of 142Cs, 142Ba, and 142La determined using total absorption spectroscopy

RADIOACTIVITY 142La, 142Ba, 142Cs(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, Eβ, Iβ, γβ-coin, total absorption spectra; deduced T1/2, average gamma energy per decay, β-feeding intensities, decay patterns, σ for the detection of reactor antineutrinos. 142Cs(β-n); deduced β-delayed neutron branching ratio. Comparison with other experimental values and ENSDF evaluation. Modular Total Absorption Spectrometer (MTAS) array of 19 NaI(Tl) coupled with auxiliary Si-strip detectors at the mass separator and Tandem accelerator at Oak Ridge National Laboratory.

doi: 10.1103/PhysRevC.107.034303
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2023YO04      Phys.Rev. C 108, 064307 (2023)

R.Yokoyama, R.Grzywacz, B.C.Rasco, N.Brewer, K.P.Rykaczewski, I.Dillmann, J.L.Tain, S.Nishimura, D.S.Ahn, A.Algora, J.M.Allmond, J.Agramunt, H.Baba, S.Bae, C.G.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, C.Domingo-Pardo, A.Estrade, N.Fukuda, S.Go, C.J.Griffin, J.Ha, O.Hall, L.J.Harkness-Brennan, J.Heideman, T.Isobe, D.Kahl, M.Karny, T.Kawano, L.H.Khiem, T.T.King, G.G.Kiss, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Liang, J.Liu, G.Lorusso, M.Madurga, K.Matsui, K.Miernik, F.Montes, A.I.Morales, P.Morrall, N.Nepal, R.D.Page, V.H.Phong, M.Piersa-Silkowska, M.Prydderch, V.F.E.Pucknell, M.M.Rajabali, B.Rubio, Y.Saito, H.Sakurai, Y.Shimizu, J.Simpson, M.Singh, D.W.Stracener, T.Sumikama, H.Suzuki, H.Takeda, A.Tarifeno-Saldivia, S.L.Thomas, A.Tolosa-Delgado, M.Wolinska-Cichocka, P.J.Woods, X.X.Xu

β-delayed neutron emissions from N>50 gallium isotopes

doi: 10.1103/PhysRevC.108.064307
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2022KI23      Astrophys.J. 936, 107 (2022)

G.G.Kiss, A.Vitez-Sveiczer, Y.Saito, A.Tarifeno-Saldivia, M.Pallas, J.L.Tain, I.Dillmann, J.Agramunt, A.Algora, C.Domingo-Pardo, A.Estrade, C.Appleton, J.M.Allmond, P.Aguilera, H.Baba, N.T.Brewer, C.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, N.Fukuda, Z.Ge, S.Go, C.J.Griffin, R.K.Grzywacz, O.Hall, A.Horvath, J.Ha, L.J.Harkness-Brennan, T.Isobe, D.Kahl, T.T.King, A.Korgul, S.Kovacs, R.Krucken, S.Kubono, M.Labiche, J.Liu, J.Liang, M.Madurga, K.Miernik, F.Molina, A.I.Morales, M.R.Mumpower, E.Nacher, A.Navarro, N.Nepal, S.Nishimura, M.Piersa-Silkowska, V.Phong, B.C.Rasco, B.Rubio, K.P.Rykaczewski, J.Romero-Barrientos, H.Sakurai, L.Sexton, Y.Shimizu, M.Singh, T.Sprouse, T.Sumikama, R.Surman, H.Suzuki, T.N.Szegedi, H.Takeda, A.Tolosa, K.Wang, M.Wolinska-Cichocka, P.Woods, R.Yokoyama, Z.Xu

Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region

NUCLEAR REACTIONS 9Be(238U, X), E=345 MeV/nucleon; measured reaction products, TOF, Eβ, Iβ. 159,160,161,162,163,164,165,166Pm, 161,162,163,164,165,166,167,168Sm, 165,166,167,168,169,170Eu, 167,168,169,170,171,172Gd; deduced new isotopes T1/2 and β-delayed neutron emission probabilities, relative r-process abundance pattern for the neutron-star merger scenario. RIKEN Nishina Center, the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array.

doi: 10.3847/1538-4357/ac80fc
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2022NE12      Phys.Rev. C 106, 044320 (2022)

S.Neupane, J.Heideman, R.Grzywacz, M.Cooper, J.Hooker, K.L.Jones, T.T.King, N.Kitamura, M.Madurga, K.Siegl, C.R.Thornsberry, P.Wagenknecht, Z.Y.Xu, L.H.Heilbronn, M.M.Rajabali, A.Chester, A.Richard, Y.Alberty-Jones, J.Derkin, T.N.Massey, D.Soltesz, N.T.Brewer, B.C.Rasco, K.P.Rykaczewski, M.Wolinska-Cichocka, J.Clark, D.Santiago-Gonzalez, G.Savard

Demonstration of the neutron tracking capability of NEXT array in time-of-flight measurements to improve energy resolution

RADIOACTIVITY 17N, 104Nb(β-n); measured neutron time-of-flight (ToF), En, In. Data on the commissioning of the Neutron dEtector with Xn Tracking (NEXT) array consisting of 8x4 optically separated segments. Measurement of 17N decay at National Superconducting Cyclotron Laboratory (NSCL), 106Nb decay Argonne National Laboratory (ANL, CARIBU Facility).

NUCLEAR REACTIONS 27Al(d, n), E=7.44 MeV; measured neutron time-of-flight (ToF), En, In. Data on the commissioning of the Neutron dEtector with Xn Tracking (NEXT) array consisting of 8x4 optically separated segments. Deuteron beam from Ohio University Edwards Accelerator Laboratory (EAL).

doi: 10.1103/PhysRevC.106.044320
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2022OG05      Phys.Rev. C 106, 024612 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, D.Ibadullayev, F.Sh.Abdullin, S.N.Dmitriev, M.G.Itkis, A.V.Karpov, N.D.Kovrizhnykh, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.Lindner, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

Investigation of 48Ca-induced reactions with 242Pu and 238U targets at the JINR Superheavy Element Factory

RADIOACTIVITY 286,287Fl, 283Cn(α), (SF)[from 242Pu(48Ca, 3n), (48Ca, 4n)286Fl/287Fl, E=242.5, 247.5 MeV, and 238U(48Ca, 3n)283Cn, E=231.1, 234.4 MeV followed by separation of fragments using gas-filled separator DGFRS-2 separator at the SHE Factory of JINR-Dubna]; measured evaporation residues (ERs), Eα, fission fragments (SF), (ER)α-coin, αα-coin, (ER)(SF)-coin using double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs); deduced T1/2 for α and SF decays, branching ratios, Q(α), production cross sections for superheavy nuclei. 279Ds, 275Hs, 271Sg(α), (SF); 282Cn, 267Rf(SF)[from 286,287Fl, 283Cn decay chains]; measured Eα, ESF deduced T1/2 for α and SF decays, average decay properties. 287Fl; discussed possible existence of isomeric states from consecutive α decays. 282Cn; discussed possible population of 2+ state. Comparison with previously available experimental results.

doi: 10.1103/PhysRevC.106.024612
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2022OG07      Phys.Rev. C 106, L031301 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, D.Ibadullayev, M.G.Itkis, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, I.V.Shirokovski, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, V.B.Zlokazov, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

First experiment at the Super Heavy Element Factory: High cross section of 288Mc in the 243Am + 48Ca reaction and identification of the new isotope 264Lr

NUCLEAR REACTIONS 243Am(48Ca, 2n)289Mc, (48Ca, 3n)288Mc, (48Ca, 4n), E=239.1, 240.9, 243.9 MeV; measured evaporation residues (ER), α, and fission fragments (SF), (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, production σ(E) for superheavy nuclei using gas-filled separator DGFRS-2, two double-sided strip detectors (DSSD), two multiwire proportional chambers (MWPC) at the DC280 cyclotron facility of the Super Heavy Element Factory of JINR-Dubna.

RADIOACTIVITY 288,289Mc, 284,285Nh, 280,281Rg, 276Mt, 272Bh, 268Db(α); 281Rg, 277Mt, 268Db, 264Lr(SF)[from 243Am(48Ca, xn)]; measured Eα, ESF, (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, T1/2. 268Db; deduced α/SF branching ratio. 264Lr; deduced new isotope, T1/2, average decay properties. 288Mc, 284Nh(EC), (β+); discussed upper limit for decay mode. History of 55 correlated events observed for 288Mc and six for 289Mc is listed by authors in the Supplemental material of the paper.

doi: 10.1103/PhysRevC.106.L031301
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2022OG08      Phys.Rev. C 106, 064306 (2022)

Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, A.A.Dzhioev, D.Ibadullayev, M.G.Itkis, A.V.Karpov, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, I.S.Rogov, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang

New isotope 286Mc produced in the 243Am + 48Ca reaction

NUCLEAR REACTIONS 243Am(48Ca, X)288Mc/289Mc, 243Am(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E=242.2, 250.8, 259.1 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, fission fragments, (SF), (SF)α-coin, (ER)α-coin, αα-coin; deduced σ(E) for superheavy nuclei production. Gas-filled separator DGFRS-2 at the DC280 cyclotron (SHE Factory at JINR). Measurements with double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs).

RADIOACTIVITY 286,287,288Mc, 289Mc, 282Nh, 283Nh, 284Nh, 285Nh, 278,280Rg, 274,275,276Mt, 270,271,272Bh, 268Db(α); 279,281Rg, 266,267,268Db, 264Lr(SF) [from 243Am(48Ca, xn), E=E=242.2, 250.8, 259.1 MeV]; measured Eα, ESF; deduced T1/2. 268Db; deduced α/SF branching ratio. 286Mc; deduced new isotope. Comparison of deduced half-lives with theoretical predictions.

doi: 10.1103/PhysRevC.106.064306
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2022PH01      Phys.Rev.Lett. 129, 172701 (2022)

V.H.Phong, S.Nishimura, G.Lorusso, T.Davinson, A.Estrade, O.Hall, T.Kawano, J.Liu, F.Montes, N.Nishimura, R.Grzywacz, K.P.Rykaczewski, J.Agramunt, D.S.Ahn, A.Algora, J.M.Allmond, H.Baba, S.Bae, N.T.Brewer, C.G.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, I.Dillmann, C.Domingo-Pardo, A.Fijalkowska, N.Fukuda, S.Go, C.J.Griffin, J.Ha, L.J.Harkness-Brennan, T.Isobe, D.Kahl, L.H.Khiem, G.G.Kiss, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Liang, Z.Liu, K.Matsui, K.Miernik, B.Moon, A.I.Morales, P.Morrall, N.Nepal, R.D.Page, M.Piersa-Silkowska, V.F.E.Pucknell, B.C.Rasco, B.Rubio, H.Sakurai, Y.Shimizu, D.W.Stracener, T.Sumikama, H.Suzuki, J.L.Tain, H.Takeda, A.Tarifeno-Saldivia, A.Tolosa-Delgado

β-Delayed One and Two Neutron Emission Probabilities Southeast of 132Sn and the Odd-Even Systematics in r-Process Nuclide Abundances

NUCLEAR REACTIONS 9Be(238U, F)121Rh/122Rh/123Rh/124Rh/125Rh/123Pd/124Pd/125Pd/126Pd/127Pd/128Pd/126Ag/127Ag/128Ag/129Ag/130Ag/131Ag/129Cd/130Cd/131Cd/132Cd/133Cd/134Cd/131In/132In/133In/134In/135In/136In/134Sn/135Sn/136Sn/137Sn/138Sn/139Sn/138Sb/139Sb/140Sb/141Sb, E=345 MeV/nucleon; measured fission fragments using BigRIPS and ZeroDegree spectrometers at RIBF-RIKEN facility for separation of fragments by A/Q and Z through measurements of time-of-flight (TOF), magnetic rigidity (Bρ) and energy loss (ΔE); deduced A/Q versus Z particle identification plots.

RADIOACTIVITY 129,130,131Ag, 130,131,132,133Cd, 134Cd, 131,132,133,134,135,136In, 134,135,136,137,138,139Sn(β-), (β-n), (β-2n)[from 9Be(238U, F), E=345 MeV/nucleon]; measured implanted ions, neutrons, β, γ, (implants)β-, (implants)β(1n)- and (implants)β(2n)-correlations, T1/2 of decays of ground states using BRIKEN neutron counter with 140 3He-filled proportional counters, AIDA array of DSSSDs for implants and β decays, two Clover HPGe detectors for γ radiation, and two thick plastic scintillators; deduced T1/2, %β-n or Pn, %β-2n or P2n from simultaneous fits of β-, β-1n and β-2n-decay curves. Comparison with previous experimental results, and with theoretical predictions from quasiparticle random-phase approximation (QRPA), based on finite range droplet model (FRDM) and the relativistic Hartree-Bogoliubov (RHB) plus proton-neutron QRPA (pnQRPA).

doi: 10.1103/PhysRevLett.129.172701
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2022RA11      Phys.Rev. C 105, 064301 (2022)

B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, M.P.Cooper, K.C.Goetz, J.W.Johnson, T.King, A.Laminack, J.T.Matta, K.Miernik, M.Madurga, D.Miller, M.M.Rajabali, T.Ruland, P.Shuai, M.Stepaniuk, J.Winger

Deciphering 98Nb β decay with the Modular Total Absorption Spectrometer at ORNL

RADIOACTIVITY 98Nb(β-)[from decay chains of 98Rb and 98Sr produced in 238U(p, F) at HRIBF-ORNL facility]; measured Eγ, Iγ, total absorption γ-ray spectrum using NaI(Tl)-based Modular Total Absorption Spectrometer (MTAS); deduced average γ energy per β decay, and average ν-bar; discussed impact of measured β-feeding pattern on reactor decay heat calculations and predicted detection rates of reactor ν-bar. 98Zr; measured T1/2 with 98Zr and 98Nb in equilibrium, and compared with value in the ENSDF database. 98Mo; deduced levels, β feedings to the g.s. and excited states, logft, conversion electron per β decay from the E0 transition from the first excited 0+ state in 98Mo. Comparison with β feedings and average γ energy in the ENSDF and ENDF/B-VIII.0 databases, and with previous experimental results. Relevance to the study of β- decays of abundantly produced fission products in nuclear reactors.

doi: 10.1103/PhysRevC.105.064301
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2022SH20      Phys.Rev. C 105, 054312 (2022)

P.Shuai, B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, S.Go, M.Cooper, K.C.Goetz, J.W.Johnson, C.U.Jost, T.T.King, J.T.Matta, J.H.Hamilton, A.Laminack, K.Miernik, M.Madurga, D.Miller, C.D.Nesaraja, S.Padgett, S.V.Paulauskas, M.M.Rajabali, T.Ruland, M.Stepaniuk, E.H.Wang, J.A.Winger

Determination of β-decay feeding patterns of 88Rb and 88Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF

RADIOACTIVITY 88Rb(β-), 88Kr(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, Eβ, Iβ; deduced β-intensities, ground state feedings in β-decay. 88Rb; deduced T1/2. Pandemonium effect free measurements. Comparison to other experimental data. Modular Total Absorption Spectrometer (MTAS) NaI(Tl) detector array at Holifield Radioactive Ion Beam Facility (HRIBF) at the Oak Ridge National Laboratory.

doi: 10.1103/PhysRevC.105.054312
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2021BA34      Phys.Rev. C 104, 024308 (2021)

J.C.Batchelder, C.Apgar, N.T.Brewer, C.J.Gross, R.K.Grzywacz, S.Ilyushkin, M.Madurga, K.Miernik, S.W.Padgett, S.V.Paulauskas, W.A.Peters, B.C.Rasco, K.P.Rykaczewski, D.W.Stracener, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar, D.W.Bardayan, M.E.Howard, B.Manning, M.Matos, A.J.Mendez, D.Miller, A.Ratkiewicz, E.H.Wang

Levels in 125Cd populated by the β decay of 125mAg and 125Ag

RADIOACTIVITY 125,125mAg(β-), (β-n)[from 238U(p, F), E=50 MeV from the ORIC cyclotron at the HRIBF-ORNL facility, followed by mass separation of fission fragments by a high resolution magnet]; 124Cd(β-)[from 125Cd β-n decay]; measured Eγ, Iγ, βγ- and γγ-coin, half-lives of decays of the g.s. and isomer of 125Ag, %β-n or Pn using two HPGe clover detectors for γ rays, two plastic scintillators for β particles, and 48 plastic scintillators for the detection of neutrons. 125Cd, 124In; deduced levels, J, π, multipolarity, β feedings, logft. Comparison with previously reported results.

doi: 10.1103/PhysRevC.104.024308
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2021HA19      Phys.Lett. B 816, 136266 (2021)

O.Hall, T.Davinson, A.Estrade, J.Liu, G.Lorusso, F.Montes, S.Nishimura, V.H.Phong, P.J.Woods, J.Agramunt, D.S.Ahn, A.Algora, J.M.Allmond, H.Baba, S.Bae, N.T.Brewer, C.G.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, I.Dillmann, C.Domingo-Pardo, A.Fijalkowska, N.Fukuda, S.Go, C.J.Griffin, R.Grzywacz, J.Ha, L.J.Harkness-Brennan, T.Isobe, D.Kahl, L.H.Khiem, G.G.Kiss, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Liang, Z.Liu, K.Matsui, K.Miernik, B.Moon, A.I.Morales, P.Morrall, M.R.Mumpower, N.Nepal, R.D.Page, M.Piersa, V.F.E.Pucknell, B.C.Rasco, B.Rubio, K.P.Rykaczewski, H.Sakurai, Y.Shimizu, D.W.Stracener, T.Sumikama, H.Suzuki, J.L.Tain, H.Takeda, A.Tarifeno-Saldivia, A.Tolosa-Delgado, M.Wolinska-Cichocka, R.Yokoyama

β-delayed neutron emission of r-process nuclei at the N = 82 shell closure

RADIOACTIVITY 115,116Tc, 116,117,118,119,120,121Ru, 118,119,120,121,122,123,124Rh, 121,122,123,124,125,126,127,128Pd, 124,125,126,127,128,129Ag, 127,128,129,130Cd(β-n) [from 9Be(238U, X), E=345 MeV/nucleon]; measured decay products, Eβ, Iβ, En, In; deduced β-delayed neutron emission probabilities, T1/2. RIKEN using the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array.

doi: 10.1016/j.physletb.2021.136266
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2021LU08      Int.J.Mod.Phys. E30, 2150037 (2021)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, E.H.Wang, S.Frauendorf, W.Y.Liang, C.F.Jiao, Q.Wu, H.L.Liu, F.R.Xu, Y.X.Liu, Y.Sun, J.K.Hwang, S.H.Liu, S.J.Zhu, N.T.Brewer, I.Y.Lee, G.M.Ter-Akopian, Yu.Oganessian, A.V.Daniel, R.Donangelo, W.C.Ma

First observation of collective rotational bands in neutron-rich 142La and the study of octupole/triaxial deformations in 142, 143La

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-g.-coin. 142,143La; deduced γ-ray energies and intensities, J, π, yrast band, octupole deformation parameter. TRS model calculations.

doi: 10.1142/S0218301321500373
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2021ST14      Nucl.Instrum.Methods Phys.Res. A1012, 165593 (2021)

M.Stukel, B.C.Rasco, N.T.Brewer, P.C.F.Di Stefano, K.P.Rykaczewski, H.Davis, E.D.Lukosi, L.Hariasz, M.Constable, P.Davis, K.Dering, A.Fijalkowska, Z.Gai, K.C.Goetz, R.K.Grzywacz, J.Kostensalo, J.Ninkovic, P.Lechner, Y.Liu, M.Mancuso, C.L.Melcher, F.Petricca, C.Rouleau, P.Squillari, L.Stand, D.W.Stracener, J.Suhonen, M.Wolinska-Cichocka, I.Yavin

A novel experimental system for the KDK measurement of the 40K decay scheme relevant for rare event searches

RADIOACTIVITY 40K(EC), (β-); measured decay products, Eγ, Iγ, X-rays; deduced preliminary results for the branching ratio of the electron capture directly to the ground state of 40Ar. The KDK (Potassium (K) Decay (DK)) collaboration.

doi: 10.1016/j.nima.2021.165593
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2021WA04      Phys.Rev. C 103, 014317 (2021)

E.H.Wang, J.M.Eldridge, N.T.Brewer, J.H.Hamilton, J.C.Batchelder, Y.X.Liu, Y.Sun, C.Brown, C.J.Zachary, B.M.Musangu, A.V.Ramayya, K.P.Rykaczewski, C.J.Gross, R.Grzywacz, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

Long-lived isomeric states and quasiparticle band structures in neutron-rich 162, 164Gd nuclei from β decay

RADIOACTIVITY 162,164Eu(β-)[from 238U(p, F), E=50 MeV at the at the HRIB facility of ORNL]; measured Eγ, Iγ, γγ- and βγ-coin, half-lives of 162Eu g.s. and isomer and 164Eu g.s. decays, half-lives of isomers in 162,164Gd by γ(t). 162,164Eu; deduced J, π for the ground states, and the isomer in 162Eu. 162,164Gd; deduced levels, J, π, isomers, total conversion coefficients, β feedings and logft for 164Eu to 164Gd decay, configurations, β and γ rotational bands. Comparison with projected shell model calculations, and with systematics of K isomer hindrance factors in neighboring nuclei.

doi: 10.1103/PhysRevC.103.014317
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2021WA19      Phys.Rev. C 103, 034301 (2021)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, C.J.Zachary, A.Lemasson, A.Navin, M.Rejmund, S.Bhattacharyya, Q.B.Chen, S.Q.Zhang, J.M.Eldridge, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Pseudospin-doublet bands and Gallagher Moszkowski doublet bands in 100Y

RADIOACTIVITY 252Cf(SF); measured Eγ, γγγ-, and γγγγ-coin using Gammasphere array at LBNL. 100Y; deduced levels, J, π, bands, configurations.

NUCLEAR REACTIONS 9Be(238U, F)100Y, E=6.2 MeV/nucleon; measured Eγ, γγ-coin, A- and Z-gated γ spectra using VAMOS++ spectrometer and EXOGAM array at GANIL facility. 100Y; deduced high-spin levels, J, π, rotational bands, B(M1)/B(E2), configurations, moments of inertia plots. Comparison with particle-rotor model calculations.

NUCLEAR STRUCTURE 100Y; calculated potential-energy surface in the (β2, γ) plane, levels, J, π, bands, in-band B(M1), B(E2), B(M1)/B(E2), rms components of the angular momentum versus spin. Constrained triaxial covariant density-functional theory (CDFT) and quantal particle rotor model (PRM) calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034301
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2021WA42      Nucl.Phys. A1015, 122281 (2021)

E.H.Wang, N.T.Brewer, J.H.Hamilton, A.V.Ramayya, W.A.Yzaguirre, J.K.Hwang, S.H.Liu, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Coexistence of octupole deformation and beta and gamma vibrational bands in 148Ce

RADIOACTIVITY 252Cf(SF); measured reaction products, Eγ, Iγ. 148Ce; deduced γ-ray energies and intensities, J, π, high-spin states, vibrartional bands, mixing ratios.

doi: 10.1016/j.nuclphysa.2021.122281
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2020TA02      Phys.Rev.Lett. 124, 052502 (2020)

T.Tanaka, K.Morita, K.Morimoto, D.Kaji, H.Haba, R.A.Boll, N.T.Brewer, S.Van Cleve, D.J.Dean, S.Ishizawa, Y.Ito, Y.Komori, K.Nishio, T.Niwase, B.C.Rasco, J.B.Roberto, K.P.Rykaczewski, H.Sakai, D.W.Stracener, K.Hagino

Study of Quasielastic Barrier Distributions as a Step towards the Synthesis of Superheavy Elements with Hot Fusion Reactions

NUCLEAR REACTIONS 248Cm(22Ne, X), (26Mg, X), 238U(48Ca, X), E(cm)=165.1, 203.7 MeV; measured reaction products; deduced σ. Comparison with available data.

doi: 10.1103/PhysRevLett.124.052502
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2020ZA04      Phys.Rev. C 101, 054312 (2020)

C.J.Zachary, N.T.Brewer, J.C.Batchelder, E.Wang, J.H.Hamilton, J.M.Eldridge, B.M.Musangu, A.V.Ramayya, C.J.Gross, K.P.Rykaczewski, R.Grzywacz, A.C.Dai, F.R.Xu, Y.X.Liu, Y.Sun, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

Identification of new transitions and levels in 163Gd from β-decay studies

RADIOACTIVITY 163Eu(β-)[from 238U(p, F), E=50 MeV, pure 163Eu beam using high-resolution isobar separator at HRIBF-ORNL]; measured Eγ, Iγ, Eβ-, Iβ-, γγ-, βγγ- and (x ray)γ-coin using the CARDS HPGe clover array for γ detection and plastic scintillators for β detection. 163Gd; deduced levels, J, π, bands, configurations; calculated configuration-constrained potential-energy surface (PES) for ν1/2[521] configuration. Comparison with projected shell-model calculations.

doi: 10.1103/PhysRevC.101.054312
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2020ZA07      Phys.Rev. C 102, 044302 (2020)

C.J.Zachary, E.Wang, N.T.Brewer, J.C.Batchelder, J.H.Hamilton, J.M.Eldridge, B.M.Musangu, A.V.Ramayya, C.J.Gross, K.P.Rykaczewski, R.Grzywacz, A.C.Dai, F.R.Xu, M.Madurga, D.Miller, D.W.Stracener, C.Jost, E.F.Zganjar, J.A.Winger, M.Karny, S.V.Paulauskas, S.H.Liu, M.Wolinska-Cichocka, S.W.Padgett, A.J.Mendez, K.Miernik, A.Fijalkowska, S.V.Ilyushkin

New transitions and levels for 163Tb obtained from β-decay studies

RADIOACTIVITY 163Gd(β-)[mass separated 163Gd beam from fission at HRIBF-ORNL]; measured Eγ, Iγ, βγγ-, γγ- and γ(x ray)-coin using four Clover HPGe detectors and two plastic scintillators. 163Dy; deduced levels, J, π, configurations. Comparison with configuration-constrained potential-energy surface (PES) calculations.

doi: 10.1103/PhysRevC.102.044302
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2020ZH03      Phys.Rev.Lett. 124, 032501 (2020)

S.J.Zhu, E.H.Wang, J.H.Hamilton, A.V.Ramayya, Y.X.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, Z.G.Xiao, Y.Huang, G.M.Ter-Akopian, Ts.Oganessian

Coexistence of Reflection Asymmetric and Symmetric Shapes in 144Ba

RADIOACTIVITY 252Cf(SF); measured fission products, Eγ, Iγ, γ-γ-γ-coin. 144Ba; deduced γ-ray energies, J, π, high-spin states, quadrupole band structure.

doi: 10.1103/PhysRevLett.124.032501
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2019PH02      Phys.Rev. C 100, 011302 (2019)

V.H.Phong, G.Lorusso, T.Davinson, A.Estrade, O.Hall, J.Liu, K.Matsui, F.Montes, S.Nishimura, A.Boso, P.H.Regan, R.Shearman, Z.Y.Xu, J.Agramunt, J.M.Allmond, D.S.Ahn, A.Algora, H.Baba, N.T.Brewer, C.G.Bruno, R.Caballero-Folch, F.Calvino, M.Wolinska-Cichocka, G.Cortes, I.Dillmann, C.Domingo-Pardo, A.Gargano, S.Go, C.J.Griffin, R.K.Grzywacz, L.Harkness-Brennan, T.Isobe, A.Jungclaus, D.Kahl, L.H.Khiem, G.Kiss, A.Korgul, S.Kubono, K.Miernik, A.I.Morales, N.Nepal, M.Piersa, Zs.Podolyak, B.C.Rasco, K.P.Rykaczewski, H.Sakurai, Y.Shimizu, D.W.Stacener, T.Sumikama, H.Suzuki, H.Takeda, J.L.Tain, A.Tarifeno-Saldivia, A.Tolosa-Delgado, V.Vaquero, P.J.Woods, R.Yokoyama, C.Yuan

Observation of a 13449In85 Proton-neutron coupling "southeast" of 13250Sn82

NUCLEAR REACTIONS 9Be(238U, F)120Rh/121Rh/122Rh/123Rh/124Rh/125Rh/123Pd/124Pd/125Pd/126Pd/127Pd/128Pd/125Ag/126Ag/127Ag/128Ag/129Ag/130Ag/128Cd/129Cd/130Cd/131Cd/132Cd/133Cd/131In/132In/133In/134In/135In/136In/134Sn/135Sn/136Sn/137Sn/138Sn/139Sn/138Sb/139Sb/140Sb/141Te/142Te, E=345 MeV/nucleon; measured fission fragment yields, A/Q plot, Eγ, Iγ, (fragment)γ-coin, half-lives of isomers in 128Cd and 134In by (ion)γ(t) using BigRIPS, ZeroDegree spectrometer, and AIDA array for fragment separation and identification, and HPGe detectors for γ detection at RIBF-RIKEN. 128Cd, 130Ag, 132,134In; measured (ion)γ-coin spectra; deduced isomers in 128Cd and 134In, configurations, no evidence for isomers in 130Ag and 132In. 134In; compared Weisskopf estimated half-lives for E1, M1, E2 and M2 multipolarities for the isomeric transition in the case of bare nuclei and neutral atoms with the measured half-life, best agreement found for E2 multipolarity. 130Ag, 132,134In; calculated levels, J, π using shell model, and compared with available experimental data.

doi: 10.1103/PhysRevC.100.011302
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2019YO03      Phys.Rev. C 100, 031302(R) (2019)

R.Yokoyama, R.Grzywacz, B.C.Rasco, N.Brewer, K.P.Rykaczewski, I.Dillmann, J.L.Tain, S.Nishimura, D.S.Ahn, A.Algora, J.M.Allmond, J.Agramunt, H.Baba, S.Bae, C.G.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, C.Domingo-Pardo, A.Estrade, N.Fukuda, S.Go, C.J.Griffin, J.Ha, O.Hall, L.J.Harkness-Brennan, J.Heideman, T.Isobe, D.Kahl, M.Karny, T.Kawano, L.H.Khiem, T.T.King, G.G.Kiss, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Liang, J.Liu, G.Lorusso, M.Madurga, K.Matsui, K.Miernik, F.Montes, A.I.Morales, P.Morrall, N.Nepal, R.D.Page, V.H.Phong, M.Piersa, M.Prydderch, V.F.E.Pucknell, M.M.Rajabali, B.Rubio, Y.Saito, H.Sakurai, Y.Shimizu, J.Simpson, M.Singh, D.W.Stracener, T.Sumikama, R.Surman, H.Suzuki, H.Takeda, A.Tarifeno-Saldivia, S.L.Thomas, A.Tolosa-Delgado, M.Wolinska-Cichocka, P.J.Woods, X.X.Xu

Strong one-neutron emission from two-neutron unbound states in β decays of the r-process nuclei 86, 87Ga

RADIOACTIVITY 84,85,86,87Ga(β-), (β-n), (β-2n)[from 9Be(238U, F), E=345 MeV/nucleon, followed by separation and identification of fragments using the BigRIPS in-flight separator at RIBF-RIKEN facility]; measured secondary ions implanted into active stoppers made of double-sided silicon-strip detectors (DSSSDs), neutrons by BRIKEN array of 3He counters, WAS3ABi for β and ion detection, and γ rays by two clover-type HPGe detectors, (ions)βn-coin, half-lives of decays of 84,85,86,87Ga; deduced decay curves, %β-n (P1n) and %β-2n (P2n). Comparison with shell-model and QRPA calculations. Relevance to r-process modeling.

doi: 10.1103/PhysRevC.100.031302
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2018BR13      Phys.Rev. C 98, 024317 (2018)

N.T.Brewer, V.K.Utyonkov, K.P.Rykaczewski, Yu.Ts.Oganessian, F.Sh.Abdullin, R.A.Boll, D.J.Dean, S.N.Dmitriev, J.G.Ezold, L.K.Felker, R.K.Grzywacz, M.G.Itkis, N.D.Kovrizhnykh, D.C.McInturff, K.Miernik, G.D.Owen, A.N.Polyakov, A.G.Popeko, J.B.Roberto, A.V.Sabelnikov, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, N.J.Sims, E.H.Smith, V.G.Subbotin, A.M.Sukhov, A.I.Svirikhin, Yu.S.Tsyganov, S.M.Van Cleve, A.A.Voinov, G.K.Vostokin, C.S.White, J.H.Hamilton, M.A.Stoyer

Search for the heaviest atomic nuclei among the products from reactions of mixed-Cf with a 48Ca beam

NUCLEAR REACTIONS 249,250,251,252Cf(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E*=33-50 MeV; calculated evaporation residual cross sections using from five models for analyzing reactions. 249,250,251Cf(48Ca, xn)294Og, E=252, 258 MeV; Yb(48Ca, xn)216Th/217Th/218Th/219Th/220Th, E=252, 258 MeV; 206Pb(48Ca, 2n)252No, E=252, 258 MeV; measured Eα, Iα and (implants)α correlations, using Dubna Gas Filled Recoil Separator (DGFRS) for recoil separation and double-sided silicon strip detectors for α detection at JINR. Reviewed earlier experiments from 2002 to 2012 for the detection of 294Og nuclide. 295,296Og; predicted production σ, half-life and Eα for the decay of 296Og; discussed future prospects for production of these two nuclides.

RADIOACTIVITY 294Og, 290Lv, 218,219Th, 214,215Ra(α); 286Fl(SF); measured Eα, Q(α) and T1/2. 294,296Og(α); comparison of experimental values for Q(α) and T1/2 for 294Og with theoretical predictions for 294Og and 296Og.

doi: 10.1103/PhysRevC.98.024317
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2018MI03      Phys.Rev. C 97, 054317 (2018)

K.Miernik, K.P.Rykaczewski, R.Grzywacz, C.J.Gross, M.Madurga, D.Miller, D.W.Stracener, J.C.Batchelder, N.T.Brewer, A.Korgul, C.Mazzocchi, A.J.Mendez, Y.Liu, S.V.Paulauskas, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

β-delayed neutron emission from 85Ga

RADIOACTIVITY 85Ga(β-), (β-n)[from U(p, X), E=50 MeV at HRIBF-ORNL facility, followed by ion extraction using RILIS and mass analysis]; measured Eγ, Iγ, Eβ, neutrons, βγ-, γγ- and βnγ-coin using two HPGe clover detectors, two plastic β detectors, and 48 3He ionization chambers for neutron detection. 85Ga, 84Ge; deduced levels, β feedings, logft, %β-n and %β-2n, cumulative β strength function for decay of 85Ga. 85Ge(β-n); deduced %β-n for decay of 85Ge. Comparison with shell-model calculations, and with theoretical β-delayed neutron emission models.

doi: 10.1103/PhysRevC.97.054317
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2018RA27      Nucl.Instrum.Methods Phys.Res. A911, 79 (2018)

B.C.Rasco, N.T.Brewer, R.Yokoyama, R.Grzywacz, K.P.Rykaczewski, A.Tolosa-Delgado, J.Agramunt, J.L.Tain, A.Algora, O.Hall, C.Griffin, T.Davinson, V.H.Phong, J.Liu, S.Nishimura, G.G.Kiss, N.Nepal, A.Estrade

The ORNL analysis technique for extracting β-delayed multi-neutron branching ratios with BRIKEN

RADIOACTIVITY 77Cu(β-), (β-n); measured (implants)(neutron) correlations, %β-n or P1n at RIKEN; discussed statistical and systematic uncertainties, and methods to determine multi-neutron β-delayed branching ratios from BRIKEN setup. Comparison with literature values.

doi: 10.1016/j.nima.2018.09.121
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2018TA20      Acta Phys.Pol. B49, 417 (2018)

J.L.Tain, J.Agramunt, D.S.Ahn, A.Algora, J.M.Allmond, H.Baba, S.Bae, N.T.Brewer, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, I.Dillmann, C.Domingo-Pardo, A.Estrade, N.Fukuda, S.Go, C.Griffin, R.Grzywacz, J.Ha, O.Hall, L.Harkness-Brennan, T.Isobe, D.Kahl, M.Karny, G.G.Kiss, M.Kogimtzis, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Lee, J.Liu, G.Lorusso, K.Matsui, K.Miernik, F.Montes, B.Moon, A.I.Morales, N.Nepal, S.Nishimura, R.D.Page, Z.Podolyak, V.F.E.Pucknell, B.C.Rasco, P.H.Regan, A.Riego, B.Rubio, K.P.Rykaczewski, Y.Saito, H.Sakurai, Y.Shimizu, J.Simpson, P.A.Soderstrom, D.W.Stracener, T.Sumikama, R.Surman, H.Suzuki, M.Takechi, H.Takeda, A.Tarifeno-Saldivia, S.L.Thomas, A.Tolosa-Delgado, V.H.Phong, P.Woods

The BRIKEN Project: Extensive Measurements of β-delayed Neutron Emitters for the Astrophysical r Process

doi: 10.5506/aphyspolb.49.417
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2018TR07      Phys.Rev. C 98, 034309 (2018)

J.L.Tracy, J.A.Winger, B.C.Rasco, U.Silwal, D.P.Siwakoti, K.P.Rykaczewski, R.Grzywacz, J.C.Batchelder, C.R.Bingham, N.T.Brewer, L.Cartegni, A.A.Ciemny, A.Fijalkowska, C.J.Gross, C.Jost, M.Karny, K.Kolos, A.Korgul, W.Krolas, Y.Liu, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, D.W.Stracener, M.Wolinska-Cichocka, M.M.Rajabali, E.F.Zganjar

Updated β-decay measurement of neutron-rich 74Cu

RADIOACTIVITY 74Cu(β-)[from U(p, F), E=54 MeV at the Holifield Radioactive Ion Beam Facility HRIBF-ORNL]; measured Eγ, Iγ, βγ-coin, γγ-coin and βγγ-coin. 74Zn; deduced levels, J, π, β feedings, logft, simulations of total absorption γ spectrum (TAGS) from the γ-ray data, and pandemonium effect in 74Cu to 74Zn decay. Comparison with previous experimental values, and with shell model predictions.

doi: 10.1103/PhysRevC.98.034309
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2018UT02      Phys.Rev. C 97, 014320 (2018)

V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Karpov, A.G.Popeko, A.V.Sabelnikov, A.I.Svirikhin, G.K.Vostokin, J.H.Hamilton, N.D.Kovrizhnykh, L.Schlattauer, M.A.Stoyer, Z.Gan, W.X.Huang, L.Ma

Neutron-deficient superheavy nuclei obtained in the 240Pu + 48Ca reaction

NUCLEAR REACTIONS 240Pu(48Ca, 3n), (48Ca, 4n), E=250 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α, α-α, and ER-SF correlated events, reaction σ using Dubna gas-filled recoil separator (DGFRS) at the U-400 cyclotron facility of Flerov Laboratory of Nuclear Reactions(FLNR), JINR; deduced three ER-α-SF correlated decay chains decaying from 285Fl to 265Rf, one ER-α-SF decay chain, and 25 short ER-SF decay chains, super-heavy nuclides (SHN). Systematics of production σ for Cf, Cm and Am isotopes in 248Cm, 249Cf(136Xe, xn), 248Cm(86Kr, xn), and 240Pu, 243Am, 248Cm(48Ca, xn) reactions. 240,244mAm, 242mAm, 237,239,241mPu, 238,241,243,244,245,246mAm, 287Fl, 282,283Cn, 279Ds; possible production of mostly the SF activities.

RADIOACTIVITY 285Fl, 281Cn, 277Ds, 273Hs, 269Sg(α); 265Rf(SF)[from 240Pu(48Ca, 3n), E=250 MeV]; measured Eα, ESF, T1/2 from three correlated decay chains; deduced average decay properties, possible indication of decays through different energy levels. 284Fl(SF)[from 240Pu(48Ca, 4n), E=250 MeV]; deduced possible three ER-SF correlated decay chains and estimated half-life.

doi: 10.1103/PhysRevC.97.014320
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2018WA19      Int.J.Mod.Phys. E27, 1850051 (2018)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, R.Han, C.J.Zachary, J.M.Eldridge, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

New levels in spherical 96Y

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 96Y; deduced γ-ray energies, J, π. Comparison with NUSHELLX code calculations.

doi: 10.1142/S0218301318500519
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2017FR03      Int.J.Mod.Phys. E26, 1750030 (2017)

H.Fryman-Sinkhorn, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, R.N.Ali, A.A.Wani, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Possible very anharmonic one- and two-phonon γ-vibrational bands in 103Mo

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-coin. 103Mo; deduced γ-ray energies and intensities, J, π, γ-vibrational bands. Comparison with potential energy surface calculations.

doi: 10.1142/S0218301317500306
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2017KO11      Phys.Rev. C 95, 044305 (2017)

A.Korgul, K.P.Rykaczewski, R.K.Grzywacz, C.R.Bingham, N.T.Brewer, C.J.Gross, C.Jost, M.Karny, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, M.Piersa, D.W.Stracener, M.Stryjczyk, M.Wolinska-Cichocka, E.F.Zganjar

Experimental study of the β decay of the very neutron-rich nucleus 85Ge

RADIOACTIVITY 85Ge(β-), (β-n)[from 238U(p, F) at HRIBF-ORNL facility]; measured Eγ, Iγ, βγ- and βγγ-coin. 85As; deduced levels, J, π, β feedings, logft. Comparison with shell-model predictions. 84As; observed γ rays from β-n decay of 85Ge. 84,85Se, 85Br; observed γ rays from daughter nuclei.

doi: 10.1103/PhysRevC.95.044305
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2017MA54      Phys.Rev. C 96, 034319 (2017), Erratum Phys.Rev. C 102, 029902 (2020)

J.Marcellino, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

One- and two-phonon γ-vibrational bands in neutron-rich 107Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at LBNL, Berkeley. 107Mo; deduced levels, J, π, rotational and quasiparticle bands, triaxial deformation, configurations; calculated deformation from potential energy surface (PES) plot. Comparison with projected shell model calculations, and with systematics of levels in 103,104,105,106,107,108Mo.

doi: 10.1103/PhysRevC.96.034319
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2017RA06      Acta Phys.Pol. B48, 507 (2017)

B.C.Rasco, A.Fijalkowska, K.P.Rykaczewski, M.Wolinska-Cichocka, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, T.King, K.Miernik, S.V.Paulauskas, M.M.Rajabali, J.A.Winger

β Decays of 92Rb, 96gsY, and 142Cs Measured with the Modular Total Absorption Spectrometer and the Influence of γ Multiplicity on Total Absorption Spectrometry Measurements

RADIOACTIVITY 92Rb, 96Y, 142Cs(β-); measured Eγ, Iγ, Eβ, Iβ, En, In using MTAS (Modular Total Absorption Spectrometer); deduced γ multiplicity, ν-bar energy spectrum corrections, β-feeding intensities of individual level decays to the total MTAS data. Results for ν-bar vs energy compared with 2007 ENSDF data.

doi: 10.5506/APhysPolB.48.507
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2017RA10      Phys.Rev. C 95, 054328 (2017)

B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Blackmon, N.T.Brewer, K.C.Goetz, J.W.Johnson, C.U.Jost, J.H.Hamilton, K.Miernik, M.Madurga, D.Miller, S.Padgett, S.V.Paulauskas, A.V.Ramayya, E.H.Spejewski

Complete β-decay pattern for the high-priority decay-heat isotopes 137I and 137Xe determined using total absorption spectroscopy

RADIOACTIVITY 137I, 137Xe(β-)[from U(p, F), E=50 MeV]; 137I(β-n); measured Eγ, Iγ, total absorption gamma-ray spectra using Modular Total Absorption Spectrometer (MTAS) at ORNL; deduced beta-delayed neutron spectrum, beta-delayed neutron emission probability for 137I decay, Iβ feedings, ratio of MTAS measured γ decay heat to calculated γ decay heat for thermal neutrons+235U. Comparison with the evaluated data in the ENSDF database at NNDC.

doi: 10.1103/PhysRevC.95.054328
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2017WA19      Phys.Rev. C 95, 064311 (2017); Erratum Phys.Rev. C 109, 019902 (2024)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, Y.X.Liu, H.J.Li, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, Y.Sun, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Oblate deformation in neutron-rich 118, 119Ag

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array of 101 Ge detectors at LBNL-Berkeley. 118,119Ag; deduced high-spin levels, J, π, multipolarities, bands, configurations. Total Routhian surface and projected shell model calculation. Systematics of 7/2+ bands in 115,117,119Ag. Systematics of energy levels and staggering in negative-parity bands in A=104-118, odd-odd Ag isotopes.

doi: 110.1103/PhysRevC.95.064311
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2017WA50      Eur.Phys.J. A 53, 234 (2017)

E.H.Wang, W.Lewis, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

New levels and reinvestigation of octupole correlations in 146, 147La

RADIOACTIVITY 252Cf(SF); 146,147La; measured fragments Eγ, Iγ, γγ-coin, triple and fourfold γ-coin using Gammasphere; deduced γ transitions, levels, J, π, T1/2, 3+ bands, angular momentum vs energy in different bands, B(E1)/B(E2) ratio, electron dipole strength of selected states. Bands in La compared with those in 143Cs.

doi: 10.1140/epja/i2017-12409-0
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2016AL10      Phys.Rev. C 93, 044325 (2016)

M.F.Alshudifat, R.Grzywacz, M.Madurga, C.J.Gross, K.P.Rykaczewski, J.C.Batchelder, C.Bingham, I.N.Borzov, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, D.W.Stracener, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Reexamining Gamow-Teller decays near 78Ni

RADIOACTIVITY 82,83Zn, 82,83Ga(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin, half-lives of decay of 82,83Zn, 83Ga, β-delayed neutron branching ratio Pn for 82Zn decay at HRIBF-ORNL facility. 81,82,83Ga, 81,82Ge; deduced levels, J, π, beta feedings, logft. Comparison of level spectra with shell-model calculations, and with previous experimental results. 82,83Zn, 82,83Ga(β-); calculated B(GT) strengths using shell-model with NUSHELLX computer code.

doi: 10.1103/PhysRevC.93.044325
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2016BA41      Phys.Rev. C 94, 024317 (2016)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Fijalkowska, S.H.Liu, K.Miernik, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka

124In levels populated in the β decay of 124Cd

RADIOACTIVITY 124Cd(β-)[from U(p, F), E=50 MeV at Oak Ridge Isochronous Cyclotron facility]; measured Eγ, Iγ, γγ-coin at HRIBF-ORNL facility. 124In; deduced levels, J, π, multipolarity, β feedings, configuration. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.94.024317
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2016KO24      Phys.Rev. C 93, 064324 (2016)

A.Korgul, K.P.Rykaczewski, R.K.Grzywacz, C.R.Bingham, N.T.Brewer, C.J.Gross, A.A.Ciemny, C.Jost, M.Karny, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, M.Piersa, D.W.Stracener, M.Stryjczyk, M.Wolinska-Cichocka, E.F.Zganjar

β and β - n decay of the neutron-rich 84Ge nucleus

RADIOACTIVITY 84Ge(β-), (β-n)[from 238U(p, F) using IRIS2 ion source at HRIBF-ORNL cyclotron facility]; measured Eγ, Iγ, Eβ, βγ-, βγγ-coin using detection setup at the Low-Energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS). 84As; deduced levels, J, π, Iβ feedings, logft. 83As; one γ ray observed. Systematics of low-spin levels in 82Ge, 84As, 86Br, 88Rb, 90Y. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.93.064324
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2016MA50      Phys.Rev.Lett. 117, 092502 (2016)

M.Madurga, S.V.Paulauskas, R.Grzywacz, D.Miller, D.W.Bardayan, J.C.Batchelder, N.T.Brewer, J.A.Cizewski, A.Fijalkowska, C.J.Gross, M.E.Howard, S.V.Ilyushkin, B.Manning, M.Matos, A.J.Mendez, II, K.Miernik, S.W.Padgett, W.A.Peters, B.C.Rasco, A.Ratkiewicz, K.P.Rykaczewski, D.W.Stracener, E.H.Wang, M.Wolinska-Cichocka, E.F.Zganjar

Evidence for Gamow-Teller Decay of 78Ni Core from Beta-Delayed Neutron Emission Studies

RADIOACTIVITY 83,84Ga(β-), (β-n) [from 238U(p, X), E not given]; measured decay products, En, In, Eγ, Iγ. 78Ni; deduced β-decay strength, strong multineutron emission probabilities, β-decay lifetimes. Shell model calculations, neutron time-of-flight technique.

doi: 10.1103/PhysRevLett.117.092502
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2016MI18      Phys.Rev. C 94, 024305 (2016)

K.Miernik, K.P.Rykaczewski, R.Grzywacz, C.J.Gross, M.Madurga, D.Miller, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, A.Fijalkowska, M.Karny, A.Korgul, W.Krolas, C.Mazzocchi, A.J.Mendez II, S.W.Padgett, S.V.Paulauskas, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

β-decay study of 94Kr

RADIOACTIVITY 94Kr(β-)[from UCx(p, F), E=50 MeV, mass separation at HRIFB-ORNL]; measured Eγ, Iγ, half-life of 94Kr decay, γγ-, βγ-, delayed βγ-, and βγγ-coin, isomer half-life by βγ(t) at LeRIBSS with four HPGe clover detectors for γ rays and two plastic scintillators for β detection. 94Rb; deduced levels, J, π, β feedings, logft, configurations. Systematics of low-lying levels in 88,90,92,94,96Rb. Comparison of experimental and theoretical half-lives, and BCS calculation of average occupation of νg7/2 for ground states of 86,88,90,92Se, 88,90,92,94,96,98Kr, 94,96,98,100Sr.

doi: 10.1103/PhysRevC.94.024305
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2016RA25      Phys.Rev.Lett. 117, 092501 (2016)

B.C.Rasco, M.Wolinska-Cichocka, A.Fijalkowska, K.P.Rykaczewski, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, S.Go, B.Heffron, T.King, J.T.Matta, K.Miernik, C.D.Nesaraja, S.V.Paulauskas, M.M.Rajabali, E.H.Wang, J.A.Winger, Y.Xiao, C.J.Zachary

Decays of the Three Top Contributors to the Reactor ν(bar)e High-Energy Spectrum, 92Rb, 96gsY, and 142Cs, Studied with Total Absorption Spectroscopy

RADIOACTIVITY 92Rb, 96Y, 142Cs(β-), (β-n) [from 238U(p, X), E=40 MeV]; measured decay products, Eγ, Iγ; deduced β-feeding intensity, impact on a reactor anti-neutrino spectrum. Comparison with available data.

doi: 10.1103/PhysRevLett.117.092501
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2015KO19      Phys.Rev. C 92, 054318 (2015)

A.Korgul, K.P.Rykaczewski, R.Grzywacz, C.R.Bingham, N.T.Brewer, A.A.Ciemny, C.J.Gross, C.Jost, M.Karny, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, D.W.Stracener, M.Wolinska-Cichocka

Experimental study of β and β-n decay of the neutron-rich N = 54 isotone 87As

RADIOACTIVITY 87As(β-), (β-n)[from 238U(p, F), E=54 MeV at HIRBF-ORNL]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin. 86,87Se; deduced levels, J, π. 87As; discussed ground state J, π and configuration. Comparison with shell model calculations, and with structures of N=53 nuclei 83Zn and 85Ge.

NUCLEAR STRUCTURE 83Zn, 85Ge, 87Se; calculated levels, J, π using shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.054318
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2015MA25      Acta Phys.Pol. B46, 713 (2015)

C.Mazzocchi, A.Korgul, K.P.Rykaczewski, R.Grzywacz, P.Baczyk, C.R.Bingham, N.T.Brewer, C.J.Gross, C.Jost, M.Karny, M.Madurga, A.J.Mendez II, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, D.W.Stracener, M.Wolinska-Cichocka

Beta Decay of the Most Neutron-rich Isotopes Close to 78Ni

RADIOACTIVITY 86As(β-) [from U(p, X), E=54 MeV]; measured decay products, Eγ, Iγ; deduced partial level scheme, γ-ray energies, J, π.

doi: 10.5506/APhysPolB.46.713
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2015MA61      Phys.Rev. C 92, 054317 (2015)

C.Mazzocchi, K.P.Rykaczewski, R.Grzywacz, P.Baczyk, C.R.Bingham, N.T.Brewer, C.J.Gross, C.Jost, M.Karny, A.Korgul, M.Madurga, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, A.A.Sonzogni, D.W.Stracener, M.Wolinska-Cichocka

β-decay properties of the very neutron-rich isotopes 86Ge and 86As

RADIOACTIVITY 86Ge, 86As(β-), (β-n)[from 238U(p, F), E=54 MeV at HIRBF-ORNL]; measured Eγ, Iγ, Eβ, βγ-, βγγ-, γγ-coin. 85,86As, 85,86Se; deduced levels, J, π, β feedings, logft, B(GT), configurations. Comparison of level structures of 86As and 86Se, and B(GT) with advanced shell model calculations. Discussed fission yield for 86Ge in different evaluated libraries.

doi: 10.1103/PhysRevC.92.054317
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2015UT02      Phys.Rev. C 92, 034609 (2015)

V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Sabelnikov, G.K.Vostokin, J.H.Hamilton, M.A.Stoyer, S.Y.Strauss

Experiments on the synthesis of superheavy nuclei 284Fl and 285Fl in the 239, 240Pu + 48Ca reactions

NUCLEAR REACTIONS 240Pu(48Ca, 3n)285Fl, E=245, 250 MeV; 240Pu(48Ca, 4n)284Fl, E=245, 250 MeV; 239Pu(48Ca, 3n)284Fl, E=245 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α and ER-SF correlated events, σ using DGFRS separator at U400 cyclotron facility of FLNR-JINR. Decay studies. Super heavy nuclei. Systematics of cross sections.

RADIOACTIVITY 284Fl(SF), 285Fl(α)[from 239,240Pu(48Ca, xn), E=245, 250 MeV]; 281Cn, 277Ds, 273Hs, 269Sg(α), 265Rf[from 285Fl α decay chain]; measured EER, Eα, ESF, T1/2; deduced Q(α). Systematics of SF half-lives and α-decay energies.

doi: 10.1103/PhysRevC.92.034609
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2015WA28      Phys.Rev. C 92, 034317 (2015); Erratum Phys.Rev. C 109, 029902 (2024)

E.H.Wang, A.Lemasson, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, J.M.Eldridge, A.Navin, M.Rejmund, S.Bhattacharyya, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, H.L.Liu, H.Zhou, Y.X.Liu, H.J.Li, Y.Sun, F.R.Xu, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Identification of new transitions and mass assignments of levels in 143-153Pr

NUCLEAR REACTIONS 9Be(238U, F), E=6.2 MeV/nucleon; measured Eγ, Iγ, (fission fragment)γ-, γγ-coin using VAMOS++ spectrometer and EXOGAM array at GANIL. 143,144,145,146,147,148,149,150,151,152,153Pr; deduced levels, J, π, bands. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.92.034317
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2014BA18      Phys.Rev. C 89, 054321 (2014)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Fijalkowska, S.H.Liu, K.Miernik, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka

Structure of low-lying states in 124, 126Cd populated by β decay of 124, 126Ag

RADIOACTIVITY 124,124m,126,126mAg(β-)[from 238U(p, X), E=50 MeV]; measured Eγ, Iγ, γγ-, γ(ce)-coin, half-lives at LeRIBSS-HRIBF-ORNL facility. 124,126Cd; deduced levels, isomers, J, π, β feedings, configurations. Systematics of level structures and B(E2) values in A=110-126 even-even Cd isotopes. Excited 0+ and possible multi-phonon states.

doi: 10.1103/PhysRevC.89.054321
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2014LU07      Phys.Rev. C 89, 044326 (2014)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, E.Wang, Y.X.Liu, C.F.Jiao, W.Y.Liang, F.R.Xu, Y.Sun, S.Frauendorf, J.K.Hwang, S.H.Liu, S.J.Zhu, N.T.Brewer, I.Y.Lee, G.M.Ter-Akopian, Yu.Oganessian, R.Donangelo, W.C.Ma

First observation of a rotational band and the role of the proton intruder orbital π 1/2+[431] in very neutron-rich odd-odd 106Nb

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, 3- and 4-fold γγ-coin, coincidences with γ rays from complementary A=142-144 La isotopes , fission yield ratio using Gammasphere array at LBNL. 104,106Nb; deduced high-spin levels, J, π, rotational bands, alignment and moments of inertia plots, configurations. Comparison with projected shell model calculations. Role of 1/2[431] proton intruder orbital, and shape evolution.

NUCLEAR STRUCTURE 104,106Nb; calculated levels, J, π, potential energy surfaces (PES), configurations, alignments, moments of inertia. Projected shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.044326
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2014MI16      Phys.Rev. C 90, 034311 (2014)

K.Miernik, K.P.Rykaczewski, C.J.Gross, R.Grzywacz, M.Madurga, D.Miller, J.C.Batchelder, N.T.Brewer, C.U.Jost, K.Kolos, A.Korgul, C.Mazzocchi, A.J.Mendez, Y.Liu, S.V.Paulauskas, D.W.Stracener, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Excited states in 82As studied in the decay of 82Ge

RADIOACTIVITY 82Ge(β-)[from 83Ga(β-n), 83Ga from U(p, F), E=50 MeV]; measured Eγ, Iγ, βγ-, γγ-coin using RILIS and high-resolution electro-magnetic separator, LeRIBBS facility at HRIBF-ORNL facility. 82As; deduced levels, J, π, isomer, logft. 82,87As, 83Ge(β-); observed γ rays. Comparison with shell model calculations using several different interactions, and with experimental results from 82Se(t, 3He).

doi: 10.1103/PhysRevC.90.034311
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2014WA53      Phys.Rev. C 90, 067306 (2014)

E.H.Wang, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Identification of a possible proton two-quasiparticle band in 158Sm

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at LBNL facility. 158Sm; deduced high-spin levels, J, π, bands, configuration, Comparison with projected shell model (PSM) calculations. Systematics of 2-quasiparticle bands in 156,158Sm, 156Nd.

doi: 10.1103/PhysRevC.90.067306
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2013KO31      Phys.Rev. C 88, 044330 (2013)

A.Korgul, K.P.Rykaczewski, R.Grzywacz, H.Sliwinska, J.C.Batchelder, C.Bingham, I.N.Borzov, N.Brewer, L.Cartegni, A.Fijalkowska, C.J.Gross, J.H.Hamilton, C.Jost, M.Karny, W.Krolas, S.Liu, C.Mazzocchi, M.Madurga, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.Paulauskas, D.Shapira, D.Stracener, K.Sieja, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Experimental study of the β-γ and β-nγ decay of the neutron-rich nucleus 85Ga

RADIOACTIVITY 85Ga(β-), (β-n)[from 238U(p, X), E=54 MeV]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of 85Ga isotope using LeRIBSS system and high-resolution on-line mass separator at HRIBF-ORNL facility. 84,85Ge; deduced levels, J, π. Systematics of first 5/2+ and 3/2+ excited states in N=53 nuclei 85Ge, 87Se, 89Kr, 91Sr, 93Sr. Comparison of level structure with shell-model calculations. Comparison of β-γ and β-n-γ decay branches with DF3a+CQRPA calculations. 84,85Ge, 84As(β-); observed γ rays.

NUCLEAR STRUCTURE 83,84,85Ge; calculated levels, J, π. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044330
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2013LI23      Phys.Rev. C 87, 057302 (2013)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, S.J.Zhu, Y.Shi, F.R.Xu, J.C.Batchelder, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian

New high-spin level scheme of neutron-rich 112Rh

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 112Rh; deduced high-spin levels, J, π, bands, triaxiality. Total Routhian surface calculations. Systematics of yrare bands in 112,114Rh.

doi: 10.1103/PhysRevC.87.057302
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2013LU18      Nucl.Phys. A919, 67 (2013); Erratum Nucl.Phys. A983, 321 (2019)

Y.X.Luo, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, S.Frauendorf, J.K.Hwang, N.J.Stone, S.J.Zhu, N.T.Brewer, E.Wang, I.Y.Lee, S.H.Liu, G.M.Ter Akopian, A.V.Daniel, Yu.Ts.Oganessian, M.A.Stoyer, R.Donangelo, W.C.Ma, J.D.Cole, Y.Shi, F.R.Xu

New insights into the nuclear structure in neutron-rich 112, 114, 115, 116, 117, 118Pd

RADIOACTIVITY 252Cf(SF); measured fission fragments Eγ, Iγ(θ), γγ-coin using Compton-suppressed Ge detectors of Gammasphere array. 112,114,115,116,117,118Pd deduced levels, J, π, γ transitions, rotational bands, γ bands, triaxial deformation, wobbling, band crossing, backbanding, shape evolution; calculated deformation, shape evolution, band crossing using TRS (total Ruthian surface).

doi: 10.1016/j.nuclphysa.2013.10.002
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2013MA22      Phys.Rev. C 87, 034315 (2013); Erratum Phys.Rev. C 87, 039902 (2013)

C.Mazzocchi, K.P.Rykaczewski, A.Korgul, R.Grzywacz, P.Baczyk, C.Bingham, N.T.Brewer, C.J.Gross, C.Jost, M.Karny, M.Madurga, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, D.W.Stracener, M.Wolinska-Cichocka, I.N.Borzov

New half-life measurements of the most neutron-rich arsenic and germanium isotopes

RADIOACTIVITY 84,85,86Ge, 84,85,86,87As(β-)[from 238U(p, F)]; measured Eγ, Iγ, β, βγ-coin, half-lives using LeRIBSS at HRIBF, ORNL facility. Comparison of half-lives with previous experimental results, and with theoretical predictions from gross theory of β decay, finite-range droplet model, and energy density functional DF3a with continuum quasiparticle random-phase approximation (CQRPA).

doi: 10.1103/PhysRevC.87.034315
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2013MI13      Phys.Rev. C 88, 014309 (2013)

K.Miernik, K.P.Rykaczewski, R.Grzywacz, C.J.Gross, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, M.Madurga, C.Mazzocchi, A.J.Mendez, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

β-decay study of neutron-rich bromine and krypton isotopes

RADIOACTIVITY 93Br, 93,94Kr(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eβ, Eγ, Iγ, βγ-, γγ-coin, T1/2, delayed neutron emission probability P(n) using LeRIBSS system at HRIBF facility. 92,93Kr; deduced levels, J, π. 92Rb, 93Y(β-); observed gamma rays. Comparison of half-lives and P(n) values with previous experimental studies, and with model predictions.

doi: 10.1103/PhysRevC.88.014309
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2013MI19      Phys.Rev.Lett. 111, 132502 (2013)

K.Miernik, K.P.Rykaczewski, C.J.Gross, R.Grzywacz, M.Madurga, D.Miller, J.C.Batchelder, I.N.Borzov, N.T.Brewer, C.Jost, A.Korgul, C.Mazzocchi, A.J.Mendez, II, Y.Liu, S.V.Paulauskas, D.W.Stracener, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

Large β-Delayed One and Two Neutron Emission Rates in the Decay of 86Ga

RADIOACTIVITY 86Ga(β-), (β-n), (β-2n); measured decay products, Eγ, Iγ, En, In, Eβ, Iβ, βγ-, β-n-γ- and β-n-n-coin.; deduced T1/2, neutron beta-delayed neutron branching ratios, a quick onset of deformation. Comparison with available data.

doi: 10.1103/PhysRevLett.111.132502
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2012BA58      Phys.Rev. C 86, 064311 (2012)

J.C.Batchelder, N.T.Brewer, R.E.Goans, R.Grzywacz, B.O.Griffith, C.Jost, A.Korgul, S.H.Liu, S.V.Paulauskas, E.H.Spejewski, D.W.Stracener

Low-lying collective states in 120Cd populated by β decay of 120Ag: Breakdown of the anharmonic vibrator model at the three-phonon level

RADIOACTIVITY 120Ag(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, conversion electron spectrum, (ce)γ-, γγ-coin, half-lives, branching ratio from isomer decay using CARDS array and BESCA ce spectrometer at HRIBF. 120Cd; deduced levels, isomers, J, π, β feedings, logft, B(E2), quadrupole-octupole coupled states Systematics of decays of phonon, intruder and 3- states in 108,110,112,114,116,118,120,122Cd. Comparison with multiphonon vibrational approach.

doi: 10.1103/PhysRevC.86.064311
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2012BA62      J.Phys.:Conf.Ser. 387, 012005 (2012)

J.C.Batchelder, N.T.Brewer, C.J.Gross, R.Grzywacz, J.H.Hamilton, M.Karny, A.Kuzniak, M.F.Madurga, A.J.Mendez, S.H.Liu, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, K.P.Rykaczewski, A.V.Ramayya, D.W.Stracener, M.Wolinska-Cichocka, E.F.Zganjar

Systematics of Low Energy Collective States in neutron-rich Cd Isotopes

NUCLEAR REACTIONS 238U(p, F), E=40 MeV. 120,124,126Ag measured β-decay, Eγ, Iγ, γγ-coin. 120,124,126Cd deduced levels, J, π, γ transitions, significant mixing with intruder states, deviations from U(5) dynamical symmetry.

doi: 10.1088/1742-6596/387/1/012005
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2012HW05      Int.J.Mod.Phys. E21, 1250080 (2012)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, E.H.Wang, Y.X.Luo, S.J.Zhu

Search for two-phonon octupole vibrational bands in 88, 89, 92, 93, 94, 96Sr and 95, 96, 97, 98Zr

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ. 88,89,92,94,96Sr, 95,96,97,98Zr; deduced level properties, energies, J, π, high-spin states, phonon octupole vibrational bands. Comparison with available data.

doi: 10.1142/S0218301312500802
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2012LI54      Phys.Rev. C 86, 067302 (2012)

H.J.Li, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, Z.G.Xiao, M.Sakhaee, J.Y.Guo, S.W.Chen, N.T.Brewer, S.H.Liu, K.Li, E.Y.Yeoh, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, G.Ter-Akopian, A.Daniel, Yu.Ts.Oganessian, W.C.Ma

Identification of a new side-band and proposed octupole correlations in very neutron-rich 152Ce

RADIOACTIVITY 252Cf(SF); measured prompt γ spectrum, Eγ, Iγ, γγ-coin using Gammasphere array at LBNL. 152Ce; deduced high-spin levels, J, p, rotational bands, β2 and β3 deformations, B(E1)/B(E2) ratios, moments of inertia plots, octupole band with s=+1. Comparison with calculations in a reflection asymmetric relativistic mean-field (RAS-RMF) approach. Calculated β2 versus β3 contour plot.

doi: 10.1103/PhysRevC.86.067302
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2012LU01      Nucl.Phys. A874, 32 (2012)

Y.X.Luo, J.O.Rasmussen, C.S.Nelson, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, S.H.Liu, C.Goodin, N.J.Stone, S.J.Zhu, N.T.Brewer, Ke Li, I.Y.Lee, G.M.Ter-Akopian, A.V.Daniel, M.A.Stoyer, R.Donangelo, W.C.Ma, J.D.Cole

New high-spin level schemes and excitation modes of 117, 118, 119, 120, 122Cd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 117,118,119,120,122Cd deduced levels, J, π, quasi-rotational bands, configurations, B(E1), B(E2), angular correlations of γ in cascade; calculated yrast bands, B(E1), B(E2), deformation, triaxiality using various models and total Routhian surface, deformations, triaxiality.

doi: 10.1016/j.nuclphysa.2011.11.001
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2012LU06      Rom.J.Phys. 57, 309 (2012)

Y.X.Luo, S.H.Liu, J.H.Hamilton, A.V.Ramayya, J.O.Rasmussen, J.K.Hwang, N.T.Brewer, S.J.Zhu

Nuclear Structures of the Neutron-Rich Nuclei Around A=120

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-coin. 118,120,122Cd, 114,115Rh; deduced energy levels, J, π, triaxial deformations.


2012MA37      Phys.Rev.Lett. 109, 112501 (2012)

M.Madurga, R.Surman, I.N.Borzov, R.Grzywacz, K.P.Rykaczewski, C.J.Gross, D.Miller, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, J.H.Hamilton, J.K.Hwang, S.H.Liu, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, A.Kuzniak, C.Mazzocchi, A.J.Mendez, K.Miernik, W.Padgett, S.V.Paulauskas, A.V.Ramayya, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar

New Half-lives of r-process Zn and Ga Isotopes Measured with Electromagnetic Separation

RADIOACTIVITY 82,83Zn, 85Ga(β-); measured decay products, Eγ, Iγ, Eβ, Iβ; deduced T1/2. Comparison with FRDM, QRPA, density functional calculations.

doi: 10.1103/PhysRevLett.109.112501
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2012ZH03      Phys.Rev. C 85, 014330 (2012)

S.J.Zhu, M.Sakhaee, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, J.K.Hwang, S.H.Liu, E.Y.Yeoh, Z.G.Xiao, Q.Xu, Z.Zhang, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, K.Li, W.C.Ma

Observation of new levels and proposed octupole correlations in neutron-rich 150Ce

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 150Ce; deduced levels, J, π, multipolarity, high-spin rotational bands, B(E1)/B(E2) ratios, octupole bands. Systematics of octupole bands and moments of inertia plots in 144,146,148,150Ce.

doi: 10.1103/PhysRevC.85.014330
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2011HW03      Phys.Rev. C 84, 024305 (2011)

J.K.Hwang, J.H.Hamilton, A.V.Ramayya, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu

Possible excited deformed rotational bands in 82Ge

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, (x ray)γ-, γγ-coin using Gammasphere array. 82Ge; deduced levels, J, π, bands, quadrupole deformation, configurations and shape coexistence.

doi: 10.1103/PhysRevC.84.024305
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2011LI25      Phys.Rev. C 83, 064310 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.S.Chen, Z.C.Gao, S.J.Zhu, L.Gu, E.Y.Yeoh, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, J.C.Batchelder, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.Gelberg

Signature inversion in odd-odd 114Rh: First identification of high-spin states in very neutron-rich 114Rh and application of the triaxial projected shell model

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, fission yields ratios using the Gammasphere array. 114Rh; deduced levels, J, π, rotational bands, signature inversion, configurations. Comparison with Triaxial Projected Shell Model calculations. Systematics of negative-parity yrast bands of odd-odd Rh nuclei with A=104-114.

doi: 10.1103/PhysRevC.83.064310
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2011LI29      Phys.Rev. C 84, 014304 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, A.Gelberg, L.Gu, E.Y.Yeoh, S.J.Zhu, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, Yu.Ts.Oganessian, G.M.Ter-Akopian

High-spin level structure of 115Rh: Evolution of triaxiality in odd-even Rh isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 115Rh; deduced levels, J, π, bands, moment of inertia, signature splitting, fission yield ratios. Comparison with Rotor plus particle model calculations. Systematics of level energies, signature splittings and moments of inertia plots of 107,109,111,113,115Rh nuclei.

doi: 10.1103/PhysRevC.84.014304
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2011LI34      Int.J.Mod.Phys. E20, 1825 (2011)

K.Li, H.Hamilton, A.V.Ramayya, S.H.Liu, X.Q.Zhang, N.T.Brewer, J.K.Hwang, C.Goodin, S.J.Zhu, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, S.C.Wu, R.Donangelo, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.Unzhakova, J.D.Cole, W.C.Ma, M.A.Stoyer

Identification of high-spin states in neutron-rich 89, 90, 92Kr and 86Se

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-γ-coin. 88,90,92Kr, 86Se; deduced level schemes, energies, J, π. Comparison with nuclear systematics and angular correlation measurements.

doi: 10.1142/S0218301311019635
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2011LI41      Phys.Rev. C 84, 044303 (2011)

S.H.Liu, J.H.Hamilton, A.V.Ramayya, Y.Shi, F.R.Xu, S.J.Zhu, E.Y.Yeoh, J.C.Batchelder, N.T.Brewer, J.K.Hwang, Y.X.Luo, J.O.Rasmussen, W.C.Ma, A.V.Daniel, G.M.Ter-Akopian, Yu.Ts.Oganessian

First identification of high-spin states in the odd-odd neutron-rich nucleus 152Pr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using GAMMASPHERE array. 152Pr; deduced levels, J, π, bands, conversion coefficients, multipolarity, configurations. 96,97,98,99Y, 149Ce, 151,153Pr; measured Eγ. Systematics of quasi-neutron states in 151Ce, 153Nd, 155Sm, 157Gd, 159Dy, 161Er. Comparison with total Routhian surface (TRS) calculations.

doi: 10.1103/PhysRevC.84.044303
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2010HW03      Phys.Rev. C 82, 034308 (2010)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, S.H.Liu, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, R.Donangelo

High spin states in 151, 153Pr, 157Sm, and 93Kr

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-, (x ray)-γ coin, half-lives by γ(t) using Gammasphere array. 93Kr, 151,153Pr, 157Sm; deduced levels, J, π, bands, configurations, conversion coefficients, B(E1)/B(E2) ratios. 96,97,98,99Y, 149,150Pr; measured Eγ.

doi: 10.1103/PhysRevC.82.034308
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