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Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the β Decay of Heavy Neutron-Rich Nuclei.

Morales, A I ; Benlliure, J ; Kurtukián-Nieto, T ; Schmidt, K-H ; Verma, S ; Regan, P H ; Podolyák, Z ; Górska, M ; Pietri, S and Kumar, R , et al. (2014) In Physical Review Letters 113(2).
Abstract
This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic ^{208}Pb. The lifetimes of the 126-neutron shell isotone ^{204}Pt and the neighboring ^{200-202}Ir, ^{203}Pt, ^{204}Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N<126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce... (More)
This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic ^{208}Pb. The lifetimes of the 126-neutron shell isotone ^{204}Pt and the neighboring ^{200-202}Ir, ^{203}Pt, ^{204}Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N<126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during β decay back to stability. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
113
issue
2
article number
022702
publisher
American Physical Society
external identifiers
  • pmid:25062171
  • wos:000341315100007
  • scopus:84904330572
  • pmid:25062171
ISSN
1079-7114
DOI
10.1103/PhysRevLett.113.022702
language
English
LU publication?
yes
id
f217e966-27f5-4b34-8007-3feda654b211 (old id 4581282)
date added to LUP
2016-04-01 10:38:50
date last changed
2022-02-14 16:06:59
@article{f217e966-27f5-4b34-8007-3feda654b211,
  abstract     = {{This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic ^{208}Pb. The lifetimes of the 126-neutron shell isotone ^{204}Pt and the neighboring ^{200-202}Ir, ^{203}Pt, ^{204}Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N&lt;126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during β decay back to stability.}},
  author       = {{Morales, A I and Benlliure, J and Kurtukián-Nieto, T and Schmidt, K-H and Verma, S and Regan, P H and Podolyák, Z and Górska, M and Pietri, S and Kumar, R and Casarejos, E and Al-Dahan, N and Algora, A and Alkhomashi, N and Alvarez-Pol, H and Benzoni, G and Blazhev, A and Boutachkov, P and Bruce, A M and Cáceres, L S and Cullen, I J and Denis Bacelar, A M and Doornenbal, P and Estévez-Aguado, M E and Farrelly, G and Fujita, Y and Garnsworthy, A B and Gelletly, W and Gerl, J and Grebosz, J and Hoischen, Robert and Kojouharov, I and Kurz, N and Lalkovski, S and Liu, Z and Mihai, C and Molina, F and Mücher, D and Rubio, B and Shaffner, H and Steer, S J and Tamii, A and Tashenov, S and Valiente-Dobón, J J and Walker, P M and Wollersheim, H J and Woods, P J}},
  issn         = {{1079-7114}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the β Decay of Heavy Neutron-Rich Nuclei.}},
  url          = {{https://lup.lub.lu.se/search/files/2018774/4627604.pdf}},
  doi          = {{10.1103/PhysRevLett.113.022702}},
  volume       = {{113}},
  year         = {{2014}},
}