Fission of Pre-Actinide Nuclei near Stability

Tony Tran; Kaitlin J. Cook; Jacob Buete; David J. Hinde; Mahananda Dasgupta; Lauren T. Bezzina; Dongyun Y. Jeung; Hyeonseop Lee; Patrick McGlynn

doi:10.1051/epjconf/202636800024

Fission of Pre-Actinide Nuclei near Stability

Tony Tran
, Kaitlin J. Cook
, Jacob Buete
, David J. Hinde
, Mahananda Dasgupta
, Lauren T. Bezzina
, Dongyun Y. Jeung
, Hyeonseop Lee
, Patrick McGlynn

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

Abstract

We present preliminary results from a systematic study of heavy-ion induced fission fragment masstotal kinetic energy distributions for compound nuclei ranging from 203Tl to 217Fr. The data indicate shell
effects present in the actinide region persist for all measured nuclides and offers the first model-independent
observation of fission modes Standard I and Standard II in 203Tl. Fission fragment mass and total kinetic energy
distributions were analysed using a 2D fitting procedure. A systematic trend in the residuals between the
data and the fitted model, which is comprised of the liquid drop mode with contributions from Standard I and
Standard II, demonstrate the requirement of at least one more shell-driven fission mode closer to symmetry. This
points towards at least one more deformed shell effect playing a substantial role in the fission of pre-actinide
nuclei near stability

Original language	English
Number of pages	5
Journal	EPJ Web of Conferences
Volume	368
DOIs	https://doi.org/10.1051/epjconf/202636800024
Publication status	Published - 2026

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10.1051/epjconf/202636800024

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title = "Fission of Pre-Actinide Nuclei near Stability",

abstract = " We present preliminary results from a systematic study of heavy-ion induced fission fragment masstotal kinetic energy distributions for compound nuclei ranging from 203Tl to 217Fr. The data indicate shell effects present in the actinide region persist for all measured nuclides and offers the first model-independent observation of fission modes Standard I and Standard II in 203Tl. Fission fragment mass and total kinetic energy distributions were analysed using a 2D fitting procedure. A systematic trend in the residuals between the data and the fitted model, which is comprised of the liquid drop mode with contributions from Standard I and Standard II, demonstrate the requirement of at least one more shell-driven fission mode closer to symmetry. This points towards at least one more deformed shell effect playing a substantial role in the fission of pre-actinide nuclei near stability",

author = "Tony Tran and Cook, \{Kaitlin J.\} and Jacob Buete and Hinde, \{David J.\} and Mahananda Dasgupta and Bezzina, \{Lauren T.\} and Jeung, \{Dongyun Y.\} and Hyeonseop Lee and Patrick McGlynn",

year = "2026",

doi = "10.1051/epjconf/202636800024",

language = "English",

volume = "368",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Fission of Pre-Actinide Nuclei near Stability

AU - Tran, Tony

AU - Cook, Kaitlin J.

AU - Buete, Jacob

AU - Hinde, David J.

AU - Dasgupta, Mahananda

AU - Bezzina, Lauren T.

AU - Jeung, Dongyun Y.

AU - Lee, Hyeonseop

AU - McGlynn, Patrick

PY - 2026

Y1 - 2026

N2 - We present preliminary results from a systematic study of heavy-ion induced fission fragment masstotal kinetic energy distributions for compound nuclei ranging from 203Tl to 217Fr. The data indicate shell effects present in the actinide region persist for all measured nuclides and offers the first model-independent observation of fission modes Standard I and Standard II in 203Tl. Fission fragment mass and total kinetic energy distributions were analysed using a 2D fitting procedure. A systematic trend in the residuals between the data and the fitted model, which is comprised of the liquid drop mode with contributions from Standard I and Standard II, demonstrate the requirement of at least one more shell-driven fission mode closer to symmetry. This points towards at least one more deformed shell effect playing a substantial role in the fission of pre-actinide nuclei near stability

AB - We present preliminary results from a systematic study of heavy-ion induced fission fragment masstotal kinetic energy distributions for compound nuclei ranging from 203Tl to 217Fr. The data indicate shell effects present in the actinide region persist for all measured nuclides and offers the first model-independent observation of fission modes Standard I and Standard II in 203Tl. Fission fragment mass and total kinetic energy distributions were analysed using a 2D fitting procedure. A systematic trend in the residuals between the data and the fitted model, which is comprised of the liquid drop mode with contributions from Standard I and Standard II, demonstrate the requirement of at least one more shell-driven fission mode closer to symmetry. This points towards at least one more deformed shell effect playing a substantial role in the fission of pre-actinide nuclei near stability

U2 - 10.1051/epjconf/202636800024

DO - 10.1051/epjconf/202636800024

M3 - Article

SN - 2101-6275

VL - 368

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

ER -

Fission of Pre-Actinide Nuclei near Stability

Abstract

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