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

Autor: Phong VH; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; University of Science, Vietnam National University, Hanoi 120062, Vietnam., Nishimura S; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Lorusso G; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; National Physical Laboratory, Teddington TW11 0LW, United Kingdom.; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom., Davinson T; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom., Estrade A; Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA., Hall O; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom., Kawano T; Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Liu J; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; Department of Physics, University of Hong Kong, Pokfulman Road, Hong Kong., Montes F; National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA., Nishimura N; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; Astrophysical Big-Bang Laboratory, Cluster for Pioneering Research, RIKEN, Wako, Saitama 351-0198, Japan., Grzywacz R; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Rykaczewski KP; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Agramunt J; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Ahn DS; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon 34126, Republic of Korea., Algora A; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Allmond JM; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Baba H; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Bae S; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon 34126, Republic of Korea., Brewer NT; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Bruno CG; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom., Caballero-Folch R; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada., Calviño F; Universitat Politecnica de Catalunya, E-08028 Barcelona, Spain., Coleman-Smith PJ; STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom., Cortes G; Universitat Politecnica de Catalunya, E-08028 Barcelona, Spain., Dillmann I; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada., Domingo-Pardo C; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Fijalkowska A; Faculty of Physics, University of Warsaw, PL02-093 Warsaw, Poland., Fukuda N; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Go S; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Griffin CJ; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom., Ha J; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; Seoul National University, Department of Physics and Astronomy, Seoul 08826, Republic of Korea., Harkness-Brennan LJ; Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom., Isobe T; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Kahl D; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.; Extreme Light Infrastructure-Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Măgurele, Romania., Khiem LH; Institute of Physics, Vietnam Academy of Science and Technology, Ba Dinh, 118011 Hanoi, Vietnam.; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, 122102 Hanoi, Vietnam., Kiss GG; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; Institute for Nuclear Research (Atomki), Debrecen H4032, Hungary., Korgul A; Faculty of Physics, University of Warsaw, PL02-093 Warsaw, Poland., Kubono S; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Labiche M; STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom., Lazarus I; STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom., Liang J; McMaster University, Department of Physics and Astronomy, Hamilton, Ontario L8S 4M1, Canada., Liu Z; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China., Matsui K; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; University of Tokyo, Department of Physics, Tokyo 113-0033, Japan., Miernik K; Faculty of Physics, University of Warsaw, PL02-093 Warsaw, Poland., Moon B; Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon 34126, Republic of Korea., Morales AI; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Morrall P; STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom., Nepal N; Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA., Page RD; Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom., Piersa-Siłkowska M; Faculty of Physics, University of Warsaw, PL02-093 Warsaw, Poland., Pucknell VFE; STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom., Rasco BC; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Rubio B; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Sakurai H; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.; University of Tokyo, Department of Physics, Tokyo 113-0033, Japan., Shimizu Y; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Stracener DW; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Sumikama T; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Suzuki H; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Tain JL; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Takeda H; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan., Tarifeño-Saldivia A; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain.; Universitat Politecnica de Catalunya, E-08028 Barcelona, Spain., Tolosa-Delgado A; Instituto de Fsica Corpuscular, CSIC and Universitat de Valencia, E-46980 Paterna, Spain., Wolińska-Cichocka M; Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL-02-093 Warsaw, Poland., Woods PJ; School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom., Yokoyama R; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Center for Nuclear Study, University of Tokyo, RIKEN Campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2022 Oct 21; Vol. 129 (17), pp. 172701.
DOI: 10.1103/PhysRevLett.129.172701
Abstrakt: The β-delayed one- and two-neutron emission probabilities (P_{1n} and P_{2n}) of 20 neutron-rich nuclei with N≥82 have been measured at the RIBF facility of the RIKEN Nishina Center. P_{1n} of ^{130,131}Ag, ^{133,134}Cd, ^{135,136}In, and ^{138,139}Sn were determined for the first time, and stringent upper limits were placed on P_{2n} for nearly all cases. β-delayed two-neutron emission (β2n) was unambiguously identified in ^{133}Cd and ^{135,136}In, and their P_{2n} were measured. Weak β2n was also detected from ^{137,138}Sn. Our results highlight the effect of the N=82 and Z=50 shell closures on β-delayed neutron emission probability and provide stringent benchmarks for newly developed macroscopic-microscopic and self-consistent global models with the inclusion of a statistical treatment of neutron and γ emission. The impact of our measurements on r-process nucleosynthesis was studied in a neutron star merger scenario. Our P_{1n} and P_{2n} have a direct impact on the odd-even staggering of the final abundance, improving the agreement between calculated and observed Solar System abundances. The odd isotope fraction of Ba in r-process-enhanced (r-II) stars is also better reproduced using our new data.
Databáze: MEDLINE