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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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Physical Review Letters
volume
113
issue
2
publisher
American Physical Society
external identifiers
  • pmid:25062171
  • wos:000341315100007
  • scopus:84904330572
ISSN
1079-7114
DOI
10.1103/PhysRevLett.113.022702
language
English
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yes
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f217e966-27f5-4b34-8007-3feda654b211 (old id 4581282)
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2014-09-10 10:17:57
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@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.},
  articleno    = {022702},
  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          = {http://dx.doi.org/10.1103/PhysRevLett.113.022702},
  volume       = {113},
  year         = {2014},
}