Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the β Decay of Heavy Neutron-Rich Nuclei.
(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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- 2014
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- published
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- in
- Physical Review Letters
- volume
- 113
- issue
- 2
- article number
- 022702
- publisher
- American Physical Society
- external identifiers
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- pmid:25062171
- wos:000341315100007
- scopus:84904330572
- pmid:25062171
- 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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- 2016-04-01 10:38:50
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- 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<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}}, }