New upper limits for β -delayed fission probabilities of Fr 230,232 and Ac 230,232,234

Abstract

The process of β-delayed fission (βDF) of Fr230,232 and Ac230,232,234 was studied in an experiment performed at the ISOLDE facility at CERN. As no fission fragments were observed for any of the nuclei investigated, upper limits for their βDF probability (PβDF) were determined. The experimental results were compared with theoretical calculations that were first benchmarked on Tl178,180PβDF experimental values. The PβDF values were calculated using the code TALYS to which β-strength functions obtained from the D1M Gogny parametrization and from the Skyrme functional SKO' were given as input together with fission paths obtained with BSkG3 and BSk14 models. Sensitivity studies of different β-strength functions, and fission paths scaling on the PβDF values were conducted, suggesting a stronger dependence of the PβDF on the fission paths rather than on the β-strength function used.

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Item Type:	Article
Authors/Creators:	Bara, S. Algora, A. Andel, B. Andreyev, A. N. https://orcid.org/0000-0003-2828-0262 Antalic, S. Bark, R. A. Borge, M. J.G. Camaiani, A. Cocolios, T. E. Cubiss, J. G. https://orcid.org/0000-0002-5076-8654 De Witte, H. Fajardo-Zambrano, C. M. Favier, Z. Fraile, L. M. Fynbo, H. O.U. Goriely, S. Grzywacz, R. Heines, M. Ivandikov, F. Jones, P. M. Judson, D. S. Klimo, J. Korgul, A. Labiche, M. Lica, R. Madurga, M. Marginean, N. Mihai, C. Mišt, J. Nácher, E. Neacsu, C. Orce, J. N. Page, C. A.A. Page, R. D. Pakarinen, J. Papadakis, P. Perea, A. Piersa-Siłkowska, M. Podolyák, Zs Raabe, R. Ryssens, W. Sánchez-Fernández, A. (asf529@york.ac.uk) Sitarčík, A. Tengblad, O. Udías, J. M. Van Den Bergh, V. Van Duppen, P. Warr, N. Youssef, A. Yue, Z.
Copyright, Publisher and Additional Information:	Publisher Copyright: © 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Dates:	Accepted: 20 May 2025 Published: 2 June 2025
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Physics (York)
Funding Information:	Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/Y000285/1
Depositing User:	Pure (York)
Date Deposited:	09 Jun 2025 14:10
Last Modified:	09 Jun 2025 14:10
Published Version:	https://doi.org/10.1103/PhysRevC.111.065803
Status:	Published
Refereed:	Yes
Identification Number:	10.1103/PhysRevC.111.065803
Related URLs:	http://www.scopus.com/inward/record.url?...
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:227638

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New upper limits for β -delayed fission probabilities of Fr 230,232 and Ac 230,232,234

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