Fission-barrier heights of neutron-deficient mercury nuclei

M. Veselsky; A. N. Andreyev; S. Antalic; M. Huyse; P. Moeller; K. Nishio; A. J. Sierk; P. Van Duppen; M. Venhart

doi:10.1103/PhysRevC.86.024308

Fission-barrier heights of neutron-deficient mercury nuclei

M. Veselsky^*, A. N. Andreyev, S. Antalic, M. Huyse, P. Moeller, K. Nishio, A. J. Sierk, P. Van Duppen, M. Venhart

^*Corresponding author for this work

Physics

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

Abstract

The recently measured probabilities of the beta-delayed fission for Tl-178,Tl-180 are used to deduce the fission-barrier heights of the daughter isotopes Hg-178,Hg-180, undergoing low-energy fission. Four alternative beta-decay strength functions and four variants of the statistical model of de-excitation of the daughter nucleus are used to determine the fission-barrier height for Hg-180. Depending on the choice of the model, the deduced fission-barrier heights appear to be between 10% and 40% smaller than theoretical estimates. This observation is verified also for fission-barrier heights extracted using the probability of beta-delayed fission of Tl-178. The spread in extracted fission-barrier heights results mainly from uncertainties in the magnitude of the pairing gap at the saddle configuration.

Original language	English
Article number	ARTN 024308
Number of pages	8
Journal	Physical Review C
Volume	86
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.86.024308
Publication status	Published - 15 Aug 2012

Keywords

ISOTOPES
COMPOUND NUCLEI
HEAVY
MODEL
CROSS-SECTIONS
WIDTHS
MASSES

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10.1103/PhysRevC.86.024308

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title = "Fission-barrier heights of neutron-deficient mercury nuclei",

abstract = "The recently measured probabilities of the beta-delayed fission for Tl-178,Tl-180 are used to deduce the fission-barrier heights of the daughter isotopes Hg-178,Hg-180, undergoing low-energy fission. Four alternative beta-decay strength functions and four variants of the statistical model of de-excitation of the daughter nucleus are used to determine the fission-barrier height for Hg-180. Depending on the choice of the model, the deduced fission-barrier heights appear to be between 10% and 40% smaller than theoretical estimates. This observation is verified also for fission-barrier heights extracted using the probability of beta-delayed fission of Tl-178. The spread in extracted fission-barrier heights results mainly from uncertainties in the magnitude of the pairing gap at the saddle configuration.",

keywords = "ISOTOPES, COMPOUND NUCLEI, HEAVY, MODEL, CROSS-SECTIONS, WIDTHS, MASSES",

author = "M. Veselsky and Andreyev, {A. N.} and S. Antalic and M. Huyse and P. Moeller and K. Nishio and Sierk, {A. J.} and {Van Duppen}, P. and M. Venhart",

year = "2012",

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day = "15",

doi = "10.1103/PhysRevC.86.024308",

language = "English",

volume = "86",

journal = "Physical Review C",

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T1 - Fission-barrier heights of neutron-deficient mercury nuclei

AU - Veselsky, M.

AU - Andreyev, A. N.

AU - Antalic, S.

AU - Huyse, M.

AU - Moeller, P.

AU - Nishio, K.

AU - Sierk, A. J.

AU - Van Duppen, P.

AU - Venhart, M.

PY - 2012/8/15

Y1 - 2012/8/15

N2 - The recently measured probabilities of the beta-delayed fission for Tl-178,Tl-180 are used to deduce the fission-barrier heights of the daughter isotopes Hg-178,Hg-180, undergoing low-energy fission. Four alternative beta-decay strength functions and four variants of the statistical model of de-excitation of the daughter nucleus are used to determine the fission-barrier height for Hg-180. Depending on the choice of the model, the deduced fission-barrier heights appear to be between 10% and 40% smaller than theoretical estimates. This observation is verified also for fission-barrier heights extracted using the probability of beta-delayed fission of Tl-178. The spread in extracted fission-barrier heights results mainly from uncertainties in the magnitude of the pairing gap at the saddle configuration.

AB - The recently measured probabilities of the beta-delayed fission for Tl-178,Tl-180 are used to deduce the fission-barrier heights of the daughter isotopes Hg-178,Hg-180, undergoing low-energy fission. Four alternative beta-decay strength functions and four variants of the statistical model of de-excitation of the daughter nucleus are used to determine the fission-barrier height for Hg-180. Depending on the choice of the model, the deduced fission-barrier heights appear to be between 10% and 40% smaller than theoretical estimates. This observation is verified also for fission-barrier heights extracted using the probability of beta-delayed fission of Tl-178. The spread in extracted fission-barrier heights results mainly from uncertainties in the magnitude of the pairing gap at the saddle configuration.

KW - ISOTOPES

KW - COMPOUND NUCLEI

KW - HEAVY

KW - MODEL

KW - CROSS-SECTIONS

KW - WIDTHS

KW - MASSES

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U2 - 10.1103/PhysRevC.86.024308

DO - 10.1103/PhysRevC.86.024308

M3 - Article

VL - 86

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 2

M1 - ARTN 024308

ER -

Fission-barrier heights of neutron-deficient mercury nuclei

Abstract

Keywords

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