New type of asymmetric fission in proton-rich nuclei

A very exotic process of ${\beta}$-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-${\beta}$-decay daughter nucleus $^{180}$H...

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Detalles Bibliográficos
Autores principales: 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, Koster, U, Marsh, B A, Nishio, K, 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, T, Iwamoto, A, Moller, P, Sierk, A J
Lenguaje:eng
Publicado: 2010
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.105.252502
http://cds.cern.ch/record/1326915
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author 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
Koster, U
Marsh, B A
Nishio, K
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, T
Iwamoto, A
Moller, P
Sierk, A J
author_facet 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
Koster, U
Marsh, B A
Nishio, K
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, T
Iwamoto, A
Moller, P
Sierk, A J
author_sort Andreyev, A N
collection CERN
description A very exotic process of ${\beta}$-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-${\beta}$-decay daughter nucleus $^{180}$Hg (N/Z=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 N=50 and semimagic Z=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 $\beta$-delayed fission of $^{180}$Tl is 3.6(7)×10$^{-3}$%, approximately 2 orders of magnitude larger than in an earlier study.
id cern-1326915
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-13269152019-09-30T06:29:59Zdoi:10.1103/PhysRevLett.105.252502http://cds.cern.ch/record/1326915engAndreyev, A NElseviers, JHuyse, MVan Duppen, PAntalic, SBarzakh, ABree, NCocolios, T EComas, V FDiriken, JFedorov, DFedosseev, VFranchoo, SHeredia, J AIvanov, OKoster, UMarsh, B ANishio, KPage, R DPatronis, NSeliverstov, MTsekhanovich, IVan den Bergh, PVan De Walle, JVenhart, MVermote, SVeselsky, MWagemans, CIchikawa, TIwamoto, AMoller, PSierk, A JNew type of asymmetric fission in proton-rich nucleiNuclear Physics - ExperimentA very exotic process of ${\beta}$-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-${\beta}$-decay daughter nucleus $^{180}$Hg (N/Z=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 N=50 and semimagic Z=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 $\beta$-delayed fission of $^{180}$Tl is 3.6(7)×10$^{-3}$%, approximately 2 orders of magnitude larger than in an earlier study.oai:cds.cern.ch:13269152010
spellingShingle Nuclear Physics - Experiment
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
Koster, U
Marsh, B A
Nishio, K
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, T
Iwamoto, A
Moller, P
Sierk, A J
New type of asymmetric fission in proton-rich nuclei
title New type of asymmetric fission in proton-rich nuclei
title_full New type of asymmetric fission in proton-rich nuclei
title_fullStr New type of asymmetric fission in proton-rich nuclei
title_full_unstemmed New type of asymmetric fission in proton-rich nuclei
title_short New type of asymmetric fission in proton-rich nuclei
title_sort new type of asymmetric fission in proton-rich nuclei
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevLett.105.252502
http://cds.cern.ch/record/1326915
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