New type of asymmetric fission in proton-rich nuclei

Andreyev, A. N.*; Elseviers, J.*; Huyse, M.*; Van Duppen, P.*; Antalic, S.*; Barzakh, A.*; Bree, N.*; Cocolios, T. E.*; Comas, V. F.*; Diriken, J.*; Fedorov, D.*; Fedosseev, V.*; Franchoo, S.*; Heredia, J. A.*; Ivanov, O.*; Kster, U.*; Marsh, B. A.*; Nishio, Katsuhisa ; Page, R. D.*; Patronis, N.*; Seliverstov, M.*; Tsekhanovich, I.*; Van den Bergh, P.*; Van De Walle, J.*; Venhart, M.*; Vermote, S.*; Veselsky, M.*; Wagemans, C.*; Ichikawa, Takatoshi*; Iwamoto, Akira; Mller, P.*; Sierk, A. J.*

A very exotic process of -delayed fission of $^{180}$ Tl is studied in detail by using resonant laser ionization with subsequent mass separation at ISOLDE (CERN). In contrast to common expectations, the fission-fragment mass distribution of the post--decay daughter nucleus $^{180}$ Hg (/ = 1.25) is asymmetric. This asymmetry is more surprising since a mass-symmetric split of this extremely neutron-deficient nucleus would lead to two $^{90}$ Zr fragments, with magic = 50 and semi-magic = 40. This is a new type of asymmetric fission, not caused by large shell effects related to fragment magic proton and neutron numbers, as observed in the actinide region. The newly-measured branching ratio for -delayed fission of $^{180}$ Tl is 3.6(7)10 $^{-3}$ %.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	105
Number	:	25
Pages	:	p.252502_1 - 252502_5
Publication Year/Month	:	2010/12
Meeting title	:
Held date	:
Location (city)	:
Location (country)	:
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1103/PhysRevLett.105.252502
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:
Press Release	:
Article of JAEA R&D Review	:	Discovery of a New Type of Fission; The Fission of $^{180}$ Hg is not Influenced by Shells of Fragments[/]
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:97.27 Category:Physics, Multidisciplinary
Altmetrics	:

Registration No. : AA20100730
JAEA Abstracts No. : 39000197
Paper Submission No. : 8429

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.