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

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. Calviño; 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-Siłkowska; 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. Tarifeño-Saldivia; A. Tolosa-Delgado; M. Wolińska-Cichocka; P. J. Woods; R. Yokoyama

doi:10.1103/PhysRevLett.129.172701

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

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. BrunoR. Caballero-Folch, F. Calviño, 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-Siłkowska, 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. Tarifeño-Saldivia, A. Tolosa-Delgado, M. Wolińska-Cichocka, P. J. Woods, R. Yokoyama

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Abstract

The β-delayed one- and two-neutron emission probabilities (P1n and P2n) of 20 neutron-rich nuclei with N≥82 have been measured at the RIBF facility of the RIKEN Nishina Center. P1n of Ag130,131, Cd133,134, In135,136, and Sn138,139 were determined for the first time, and stringent upper limits were placed on P2n for nearly all cases. β-delayed two-neutron emission (β2n) was unambiguously identified in Cd133 and In135,136, and their P2n were measured. Weak β2n was also detected from Sn137,138. 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 P1n and P2n 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.

Original language	English
Article number	172701
Journal	Physical Review Letters
Volume	129
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.129.172701
State	Published - Oct 21 2022

Funding

This experiment was performed at the RI Beam Factory operated by RIKEN Nishina Center and CNS, University of Tokyo, supported by JSPS KAKENHI (Grants No. 14F04808, No. 17H06090, No. 19H00693, No. 20H05648, No. 21H01087, No. 22H04946, No. 25247045, and No. 19340074), RIKEN program for Evolution of Matter in the Universe (-EMU), National Science Foundation under Grants No. PHY-1430152 (JINA Center for the Evolution of the Elements), No. PHY-1565546 (NSCL), and No. PHY-1714153 (Central Michigan University), the Spanish Ministerio de Economa y Competitividad under Grants No. IJCI-2014-19172, No. FPA2014-52823-C2-1-P, No. FPA2014-52823-C2-2-P, No. FPA2017-83946-C2-1-P, and No. FPA2017-83946-C2-2-P, Grants from Ministerio de Ciencia e Innovacion No. PID2019–104714GB-C21 and No. PID2019–104714GB-C22, European Regional Development Fund, Generalitat Valenciana PROMETEO/2019/007, Office of Nuclear Physics, U.S. Department of Energy Grant No. DE-FG02-96ER40983 (UTK) and DE-AC05-00OR22725 (ORNL), National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Grant No. DE- NA0002132, United Kingdom Science and Technology Facilities Council Grants No. ST/N00244X/1, No. ST/P004598/1, and No. ST/V001027/1, National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No. 89233218CNA000001, Polish National Science Center under Grants No. 2020/36/T/ST2/00547 and No. 2019/33/N/ST2/03023, NKFIH (NN128072), JSPS Invitational Fellowships for Research in Japan (ID: L1955) and RIKEN intensive Research Program, and the long-term International Program Associate. I. D. and R. C. F. acknowledge funding from the Canadian Natural Sciences and Engineering Research Council (NSERC). M. P. S. acknowledges the funding support from the Foundation for Polish Science (FNP). B. M. and S. B. acknowledge support from the Institute for Basic Science of the Republic of Korea under Grants No. IBS-R031-Y1 and No. IBS-R031-D1, respectively. Finally, we thank Dr. Zhengyu Xu for the useful discussions.

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10.1103/PhysRevLett.129.172701

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Phong, V. H., Nishimura, S., Lorusso, G., Davinson, T., Estrade, A., Hall, O., Kawano, T., Liu, J., Montes, F., Nishimura, N., Grzywacz, R., Rykaczewski, K. P., Agramunt, J., Ahn, D. S., Algora, A., Allmond, J. M., Baba, H., Bae, S., Brewer, N. T., ... Yokoyama, R. (2022). β -Delayed One and Two Neutron Emission Probabilities Southeast of Sn 132 and the Odd-Even Systematics in r -Process Nuclide Abundances. Physical Review Letters, 129(17), Article 172701. https://doi.org/10.1103/PhysRevLett.129.172701

@article{c22a76efcb5342f19829228506960571,

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

abstract = "The β-delayed one- and two-neutron emission probabilities (P1n and P2n) of 20 neutron-rich nuclei with N≥82 have been measured at the RIBF facility of the RIKEN Nishina Center. P1n of Ag130,131, Cd133,134, In135,136, and Sn138,139 were determined for the first time, and stringent upper limits were placed on P2n for nearly all cases. β-delayed two-neutron emission (β2n) was unambiguously identified in Cd133 and In135,136, and their P2n were measured. Weak β2n was also detected from Sn137,138. 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 P1n and P2n 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.",

author = "Phong, {V. H.} and S. Nishimura and G. Lorusso and T. Davinson and A. Estrade and O. Hall and T. Kawano and J. Liu and F. Montes and N. Nishimura and R. Grzywacz and Rykaczewski, {K. P.} and J. Agramunt and Ahn, {D. S.} and A. Algora and Allmond, {J. M.} and H. Baba and S. Bae and Brewer, {N. T.} and Bruno, {C. G.} and R. Caballero-Folch and F. Calvi{\~n}o and Coleman-Smith, {P. J.} and G. Cortes and I. Dillmann and C. Domingo-Pardo and A. Fijalkowska and N. Fukuda and S. Go and Griffin, {C. J.} and J. Ha and Harkness-Brennan, {L. J.} and T. Isobe and D. Kahl and Khiem, {L. H.} and Kiss, {G. G.} and A. Korgul and S. Kubono and M. Labiche and I. Lazarus and J. Liang and Z. Liu and K. Matsui and K. Miernik and B. Moon and Morales, {A. I.} and P. Morrall and N. Nepal and Page, {R. D.} and M. Piersa-Si{\l}kowska and Pucknell, {V. F.E.} and Rasco, {B. C.} and B. Rubio and H. Sakurai and Y. Shimizu and Stracener, {D. W.} and T. Sumikama and H. Suzuki and Tain, {J. L.} and H. Takeda and A. Tarife{\~n}o-Saldivia and A. Tolosa-Delgado and M. Woli{\'n}ska-Cichocka and Woods, {P. J.} and R. Yokoyama",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = oct,

day = "21",

doi = "10.1103/PhysRevLett.129.172701",

language = "English",

volume = "129",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "17",

}

Phong, VH, Nishimura, S, Lorusso, G, Davinson, T, Estrade, A, Hall, O, Kawano, T, Liu, J, Montes, F, Nishimura, N, Grzywacz, R, Rykaczewski, KP, Agramunt, J, Ahn, DS, Algora, A, Allmond, JM, Baba, H, Bae, S, Brewer, NT, Bruno, CG, Caballero-Folch, R, Calviño, F, Coleman-Smith, PJ, Cortes, G, Dillmann, I, Domingo-Pardo, C, Fijalkowska, A, Fukuda, N, Go, S, Griffin, CJ, Ha, J, Harkness-Brennan, LJ, Isobe, T, Kahl, D, Khiem, LH, Kiss, GG, Korgul, A, Kubono, S, Labiche, M, Lazarus, I, Liang, J, Liu, Z, Matsui, K, Miernik, K, Moon, B, Morales, AI, Morrall, P, Nepal, N, Page, RD, Piersa-Siłkowska, M, Pucknell, VFE, Rasco, BC, Rubio, B, Sakurai, H, Shimizu, Y, Stracener, DW, Sumikama, T, Suzuki, H, Tain, JL, Takeda, H, Tarifeño-Saldivia, A, Tolosa-Delgado, A, Wolińska-Cichocka, M, Woods, PJ & Yokoyama, R 2022, 'β -Delayed One and Two Neutron Emission Probabilities Southeast of Sn 132 and the Odd-Even Systematics in r -Process Nuclide Abundances', Physical Review Letters, vol. 129, no. 17, 172701. https://doi.org/10.1103/PhysRevLett.129.172701

TY - JOUR

T1 - β -Delayed One and Two Neutron Emission Probabilities Southeast of Sn 132 and the Odd-Even Systematics in r -Process Nuclide Abundances

AU - Phong, V. H.

AU - Nishimura, S.

AU - Lorusso, G.

AU - Davinson, T.

AU - Estrade, A.

AU - Hall, O.

AU - Kawano, T.

AU - Liu, J.

AU - Montes, F.

AU - Nishimura, N.

AU - Grzywacz, R.

AU - Rykaczewski, K. P.

AU - Agramunt, J.

AU - Ahn, D. S.

AU - Algora, A.

AU - Allmond, J. M.

AU - Baba, H.

AU - Bae, S.

AU - Brewer, N. T.

AU - Bruno, C. G.

AU - Caballero-Folch, R.

AU - Calviño, F.

AU - Coleman-Smith, P. J.

AU - Cortes, G.

AU - Dillmann, I.

AU - Domingo-Pardo, C.

AU - Fijalkowska, A.

AU - Fukuda, N.

AU - Go, S.

AU - Griffin, C. J.

AU - Ha, J.

AU - Harkness-Brennan, L. J.

AU - Isobe, T.

AU - Kahl, D.

AU - Khiem, L. H.

AU - Kiss, G. G.

AU - Korgul, A.

AU - Kubono, S.

AU - Labiche, M.

AU - Lazarus, I.

AU - Liang, J.

AU - Liu, Z.

AU - Matsui, K.

AU - Miernik, K.

AU - Moon, B.

AU - Morales, A. I.

AU - Morrall, P.

AU - Nepal, N.

AU - Page, R. D.

AU - Piersa-Siłkowska, M.

AU - Pucknell, V. F.E.

AU - Rasco, B. C.

AU - Rubio, B.

AU - Sakurai, H.

AU - Shimizu, Y.

AU - Stracener, D. W.

AU - Sumikama, T.

AU - Suzuki, H.

AU - Tain, J. L.

AU - Takeda, H.

AU - Tarifeño-Saldivia, A.

AU - Tolosa-Delgado, A.

AU - Wolińska-Cichocka, M.

AU - Woods, P. J.

AU - Yokoyama, R.

PY - 2022/10/21

Y1 - 2022/10/21

N2 - The β-delayed one- and two-neutron emission probabilities (P1n and P2n) of 20 neutron-rich nuclei with N≥82 have been measured at the RIBF facility of the RIKEN Nishina Center. P1n of Ag130,131, Cd133,134, In135,136, and Sn138,139 were determined for the first time, and stringent upper limits were placed on P2n for nearly all cases. β-delayed two-neutron emission (β2n) was unambiguously identified in Cd133 and In135,136, and their P2n were measured. Weak β2n was also detected from Sn137,138. 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 P1n and P2n 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.

AB - The β-delayed one- and two-neutron emission probabilities (P1n and P2n) of 20 neutron-rich nuclei with N≥82 have been measured at the RIBF facility of the RIKEN Nishina Center. P1n of Ag130,131, Cd133,134, In135,136, and Sn138,139 were determined for the first time, and stringent upper limits were placed on P2n for nearly all cases. β-delayed two-neutron emission (β2n) was unambiguously identified in Cd133 and In135,136, and their P2n were measured. Weak β2n was also detected from Sn137,138. 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 P1n and P2n 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.

UR - http://www.scopus.com/inward/record.url?scp=85141293775&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.129.172701

DO - 10.1103/PhysRevLett.129.172701

M3 - Article

C2 - 36332266

AN - SCOPUS:85141293775

SN - 0031-9007

VL - 129

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 172701

ER -

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

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