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

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

doi:10.1016/j.physletb.2021.136266

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

Journal Article · Sat May 01 00:00:00 EDT 2021 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2021.136266· OSTI ID:1778516

; Davinson, T.; Estrade, A.; Liu, J.; Lorusso, G.; Montes, F.;

; Phong, V. H.; Woods, P. J.;

; Ahn, D. S.;

;

; Bae, S.; Brewer, N. T.; Bruno, C. G.;

;

; Coleman-Smith, P. J. more »

Theoretical models of β-delayed neutron emission are used as crucial inputs in r-process calculations. Benchmarking the predictions of these models is a challenge due to a lack of currently available experimental data. In this work the β-delayed neutron emission probabilities of 33 nuclides in the important mass regions south and south-west of ¹³²Sn are presented, 16 for the first time. The measurements were performed at RIKEN using the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array. The P_1n values presented constrain the predictions of theoretical models in the region, affecting the final abundance distribution of the second r-process peak at A ≈ 130.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP); USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Polish National Science Centre (NCN); JSPS KAKENHI; Spanish Ministerio de Economía y Competitividad; European Commission (EC); National Research Foundation (NRF) in South Korea; National Research Council Canada; NKFIH; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: 89233218CNA000001; FG02-96ER40983; AC05-00OR22725; NA0002132; PHY-1430152; PHY-1565546; PHY-1714153; UMO-2015/15/E/ST2/00217; 2017/01/X/ST2/01144; 2019/33/N/ST2/03023; 2020/36/T/ST2/00547; 14F04808; 17H06090; 25247045; 19340074

OSTI ID:: 1778516

Alternate ID(s):: OSTI ID: 1776770; OSTI ID: 1798583

Report Number(s):: LA-UR-20-30115; S0370269321002069; 136266; PII: S0370269321002069

Journal Information:: Physics Letters B, Journal Name: Physics Letters B Vol. 816 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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

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