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

O. Hall*, T. Davinson, A. Estrade, J. Liu, G. Lorusso, F. Montes, S. Nishimura, V. H. Phong, P. J. Woods, J. Agramunti, 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-SmithG. 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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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 mportant 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 P1nvalues presented constrain the predictions of theoretical models in the region, affecting the final abundance distribution of the second r-process peak at A ≈130.
Original languageEnglish
Article number136266
Pages (from-to)1-7
Number of pages7
JournalPhysics Letters B
Volume816
Early online date1 Apr 2021
DOIs
Publication statusPublished - 10 May 2021

Keywords

  • beta-delayed neutron emission
  • r-processimportant

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