New Type of Asymmetric Fission in Proton-Rich Nuclei

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

doi:10.1103/PhysRevLett.105.252502

New Type of Asymmetric Fission in Proton-Rich Nuclei

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

^*Corresponding author for this work

Physics

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

Abstract

Avery exotic process of beta-delayed fission of Tl-180 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 Hg-180 (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 Zr-90 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 Tl-180 is 3.6(7) x 10(-3)%, approximately 2 orders of magnitude larger than in an earlier study.

Original language	English
Article number	ARTN 252502
Pages (from-to)	1-5
Number of pages	5
Journal	Physical Review Letters
Volume	105
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.105.252502
Publication status	Published - 14 Dec 2010

Keywords

BARRIER
FRAGMENTS

Access to Document

10.1103/PhysRevLett.105.252502

http://prl.aps.org/abstract/PRL/v105/i25/e252502

Cite this

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., Koester, U., Marsh, B. A., Nishio, K., Page, R. D., ... Sierk, A. J. (2010). New Type of Asymmetric Fission in Proton-Rich Nuclei. Physical Review Letters, 105(25), 1-5. Article ARTN 252502. https://doi.org/10.1103/PhysRevLett.105.252502

@article{50dd1fa535cd4a09acc10fa9b175f190,

title = "New Type of Asymmetric Fission in Proton-Rich Nuclei",

abstract = "Avery exotic process of beta-delayed fission of Tl-180 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 Hg-180 (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 Zr-90 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 Tl-180 is 3.6(7) x 10(-3)%, approximately 2 orders of magnitude larger than in an earlier study.",

keywords = "BARRIER, FRAGMENTS",

author = "Andreyev, {A. N.} and J. Elseviers and M. Huyse and {Van Duppen}, P. and S. Antalic and A. Barzakh and N. Bree and Cocolios, {T. E.} and Comas, {V. F.} and J. Diriken and D. Fedorov and V. Fedosseev and S. Franchoo and Heredia, {J. A.} and O. Ivanov and U. Koester and Marsh, {B. A.} and K. Nishio and Page, {R. D.} and N. Patronis and M. Seliverstov and I. Tsekhanovich and {Van den Bergh}, P. and {Van De Walle}, J. and M. Venhart and S. Vermote and M. Veselsky and C. Wagemans and T. Ichikawa and A. Iwamoto and P. Moeller and Sierk, {A. J.}",

year = "2010",

month = dec,

day = "14",

doi = "10.1103/PhysRevLett.105.252502",

language = "English",

volume = "105",

pages = "1--5",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "25",

}

Andreyev, AN, Elseviers, J, Huyse, M, Van Duppen, P, Antalic, S, Barzakh, A, Bree, N, Cocolios, TE, Comas, VF, Diriken, J, Fedorov, D, Fedosseev, V, Franchoo, S, Heredia, JA, Ivanov, O, Koester, U, Marsh, BA, Nishio, K, Page, RD, 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, Moeller, P & Sierk, AJ 2010, 'New Type of Asymmetric Fission in Proton-Rich Nuclei', Physical Review Letters, vol. 105, no. 25, ARTN 252502, pp. 1-5. https://doi.org/10.1103/PhysRevLett.105.252502

TY - JOUR

T1 - New Type of Asymmetric Fission in Proton-Rich Nuclei

AU - Andreyev, A. N.

AU - Elseviers, J.

AU - Huyse, M.

AU - Van Duppen, P.

AU - Antalic, S.

AU - Barzakh, A.

AU - Bree, N.

AU - Cocolios, T. E.

AU - Comas, V. F.

AU - Diriken, J.

AU - Fedorov, D.

AU - Fedosseev, V.

AU - Franchoo, S.

AU - Heredia, J. A.

AU - Ivanov, O.

AU - Koester, U.

AU - Marsh, B. A.

AU - Nishio, K.

AU - Page, R. D.

AU - Patronis, N.

AU - Seliverstov, M.

AU - Tsekhanovich, I.

AU - Van den Bergh, P.

AU - Van De Walle, J.

AU - Venhart, M.

AU - Vermote, S.

AU - Veselsky, M.

AU - Wagemans, C.

AU - Ichikawa, T.

AU - Iwamoto, A.

AU - Moeller, P.

AU - Sierk, A. J.

PY - 2010/12/14

Y1 - 2010/12/14

N2 - Avery exotic process of beta-delayed fission of Tl-180 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 Hg-180 (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 Zr-90 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 Tl-180 is 3.6(7) x 10(-3)%, approximately 2 orders of magnitude larger than in an earlier study.

AB - Avery exotic process of beta-delayed fission of Tl-180 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 Hg-180 (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 Zr-90 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 Tl-180 is 3.6(7) x 10(-3)%, approximately 2 orders of magnitude larger than in an earlier study.

KW - BARRIER

KW - FRAGMENTS

UR - http://www.scopus.com/inward/record.url?scp=78650086414&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.105.252502

DO - 10.1103/PhysRevLett.105.252502

M3 - Article

SN - 0031-9007

VL - 105

SP - 1

EP - 5

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - ARTN 252502

ER -

New Type of Asymmetric Fission in Proton-Rich Nuclei

Abstract

Keywords

Access to Document

Other files and links

Cite this