Evolution of shell-driven fission below the actinides

J. Buete; B. M.A. Swinton-Bland; D. J. Hinde; K. J. Cook; M. Dasgupta; A. C. Berriman; D. Y. Jeung; K. Banerjee; L. T. Bezzina; I. P. Carter; C. Sengupta; C. Simenel; E. C. Simpson

doi:10.1016/j.nuclphysa.2025.123174

Evolution of shell-driven fission below the actinides

J. Buete^*
, B. M.A. Swinton-Bland
, D. J. Hinde
, K. J. Cook
, M. Dasgupta
, A. C. Berriman
, D. Y. Jeung
, K. Banerjee
, L. T. Bezzina
, I. P. Carter
, C. Sengupta
, C. Simenel
, E. C. Simpson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The results of a systematic measurement of heavy-ion induced fission of every even-Z nucleus from ¹⁴⁴Gd to ²¹²Th (Z_CN=64 – 90) along a line of constant N/Z is presented. We identified shell-driven fission in all systems studied. The evolving structure of the fission mass distributions with increasing Z_CN and two-dimensional mass-kinetic fitting indicates that deformed proton shell effects in the nascent fission fragments of Z_FF=34,36 and Z_FF=44,46 as the primary drivers of mass-asymmetric fission in this region. For light systems (Z_CN<80) Z_FF=34,36 can be seen to drive fission as either the heavy or light fission fragment and also at mass-symmetry with changing Z_CN.

Original language	English
Article number	123174
Number of pages	7
Journal	Nuclear Physics A
Volume	1063
DOIs	https://doi.org/10.1016/j.nuclphysa.2025.123174
Publication status	Published - Nov 2025

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@article{841a90c058c84fc4a777060ce5d2967b,

title = "Evolution of shell-driven fission below the actinides",

abstract = "The results of a systematic measurement of heavy-ion induced fission of every even-Z nucleus from 144Gd to 212Th (ZCN=64 – 90) along a line of constant N/Z is presented. We identified shell-driven fission in all systems studied. The evolving structure of the fission mass distributions with increasing ZCN and two-dimensional mass-kinetic fitting indicates that deformed proton shell effects in the nascent fission fragments of ZFF=34,36 and ZFF=44,46 as the primary drivers of mass-asymmetric fission in this region. For light systems (ZCN<80) ZFF=34,36 can be seen to drive fission as either the heavy or light fission fragment and also at mass-symmetry with changing ZCN.",

keywords = "Deformed shell effects, Shell-driven fission, Sublead fission",

author = "J. Buete and Swinton-Bland, \{B. M.A.\} and Hinde, \{D. J.\} and Cook, \{K. J.\} and M. Dasgupta and Berriman, \{A. C.\} and Jeung, \{D. Y.\} and K. Banerjee and Bezzina, \{L. T.\} and Carter, \{I. P.\} and C. Sengupta and C. Simenel and Simpson, \{E. C.\}",

note = "{\textcopyright} 2025 The Authors",

year = "2025",

month = nov,

doi = "10.1016/j.nuclphysa.2025.123174",

language = "English",

volume = "1063",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Evolution of shell-driven fission below the actinides

AU - Buete, J.

AU - Swinton-Bland, B. M.A.

AU - Hinde, D. J.

AU - Cook, K. J.

AU - Dasgupta, M.

AU - Berriman, A. C.

AU - Jeung, D. Y.

AU - Banerjee, K.

AU - Bezzina, L. T.

AU - Carter, I. P.

AU - Sengupta, C.

AU - Simenel, C.

AU - Simpson, E. C.

PY - 2025/11

Y1 - 2025/11

N2 - The results of a systematic measurement of heavy-ion induced fission of every even-Z nucleus from 144Gd to 212Th (ZCN=64 – 90) along a line of constant N/Z is presented. We identified shell-driven fission in all systems studied. The evolving structure of the fission mass distributions with increasing ZCN and two-dimensional mass-kinetic fitting indicates that deformed proton shell effects in the nascent fission fragments of ZFF=34,36 and ZFF=44,46 as the primary drivers of mass-asymmetric fission in this region. For light systems (ZCN<80) ZFF=34,36 can be seen to drive fission as either the heavy or light fission fragment and also at mass-symmetry with changing ZCN.

AB - The results of a systematic measurement of heavy-ion induced fission of every even-Z nucleus from 144Gd to 212Th (ZCN=64 – 90) along a line of constant N/Z is presented. We identified shell-driven fission in all systems studied. The evolving structure of the fission mass distributions with increasing ZCN and two-dimensional mass-kinetic fitting indicates that deformed proton shell effects in the nascent fission fragments of ZFF=34,36 and ZFF=44,46 as the primary drivers of mass-asymmetric fission in this region. For light systems (ZCN<80) ZFF=34,36 can be seen to drive fission as either the heavy or light fission fragment and also at mass-symmetry with changing ZCN.

KW - Deformed shell effects

KW - Shell-driven fission

KW - Sublead fission

UR - https://www.scopus.com/pages/publications/105009752401

U2 - 10.1016/j.nuclphysa.2025.123174

DO - 10.1016/j.nuclphysa.2025.123174

M3 - Article

AN - SCOPUS:105009752401

SN - 0375-9474

VL - 1063

JO - Nuclear Physics A

JF - Nuclear Physics A

M1 - 123174

ER -

Evolution of shell-driven fission below the actinides

Abstract

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