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

A. I. Morales; J. Benlliure; T. Kurtukian-Nieto; K. -H Schmidt; S. Verma; P. H. Regan; Z. Podolyak; M. Gorska; S. Pietri; R. Kumar; E. Casarejos; N. Al-Dahan; A. Algora; N. Alkhomashi; H. Alvarez-Pol; G. Benzoni; A. Blazhev; P. Boutachkov; A. M. Bruce; L. S. Caceres; I. J. Cullen; A. M. Denis Bacelar; P. Doornenbal; M. E. Estevez-Aguado; G. Farrelly; Y. Fujita; A. B. Garnsworthy; W. Gelletly; J. Gerl; J. Grebosz; R. Hoischen; I. Kojouharov; N. Kurz; S. Lalkovski; Z. Liu; C. Mihai; F. Molina; D. Muecher; B. Rubio; H. Shaffner; S. J. Steer; A. Tamii; S. Tashenov; J. J. Valiente-Dobon; P. M. Walker; H. J. Wollersheim; P. J. Woods

doi:10.1103/PhysRevLett.113.022702

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

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

A. I. Morales, J. Benlliure, T. Kurtukian-Nieto, K. -H Schmidt, S. Verma, P. H. Regan, Z. Podolyak, M. Gorska, S. Pietri, R. Kumar, …

Physical review letters, Vol.113(2), pp.022702-022702

11/07/2014

DOI: https://doi.org/10.1103/PhysRevLett.113.022702

PMID: 25062171

Abstract

Physical Sciences

Physics

Physics, Multidisciplinary

Science & Technology

This Letter reports on a systematic study of beta-decay half-lives of neutron-rich nuclei around doubly magic Pb-208. The lifetimes of the 126-neutron shell isotone Pt-204 and the neighboring Ir200-202, Pt-203, Au-204 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 beta 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 beta decay back to stability.

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Title: Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the beta Decay of Heavy Neutron-Rich Nuclei
Creators - without role: A. I. Morales - Universidade de Santiago de Compostela
J. Benlliure - Universidade de Santiago de Compostela
T. Kurtukian-Nieto - Universidade de Santiago de Compostela
K. -H Schmidt - GSI Helmholtz Centre for Heavy Ion Research
S. Verma - Universidade de Santiago de Compostela
P. H. Regan - University of Surrey
Z. Podolyak - University of Surrey
M. Gorska - GSI Helmholtz Centre for Heavy Ion Research
S. Pietri - University of Surrey
R. Kumar - GSI Helmholtz Centre for Heavy Ion Research
E. Casarejos - Universidade de Santiago de Compostela
N. Al-Dahan - University of Surrey
A. Algora - Universitat de València
N. Alkhomashi - University of Surrey
H. Alvarez-Pol - Universidade de Santiago de Compostela
G. Benzoni - University of Milan
A. Blazhev - University of Cologne
P. Boutachkov - GSI Helmholtz Centre for Heavy Ion Research
A. M. Bruce - University of Brighton
L. S. Caceres - GSI Helmholtz Centre for Heavy Ion Research
I. J. Cullen - University of Surrey
A. M. Denis Bacelar - University of Brighton
P. Doornenbal - GSI Helmholtz Centre for Heavy Ion Research
M. E. Estevez-Aguado - Universidade de Santiago de Compostela
G. Farrelly - University of Surrey
Y. Fujita - Osaka University
A. B. Garnsworthy - University of Surrey
W. Gelletly - University of Surrey
J. Gerl - GSI Helmholtz Centre for Heavy Ion Research
J. Grebosz - Institute of Nuclear Physics, Polish Academy of Sciences
R. Hoischen - Lund University
I. Kojouharov - GSI Helmholtz Centre for Heavy Ion Research
N. Kurz - GSI Helmholtz Centre for Heavy Ion Research
S. Lalkovski - University of Brighton
Z. Liu - University of Edinburgh
C. Mihai - Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
F. Molina - Universitat de València
D. Muecher - University of Cologne
B. Rubio - Universitat de València
H. Shaffner - GSI Helmholtz Centre for Heavy Ion Research
S. J. Steer - University of Surrey
A. Tamii - Osaka University
S. Tashenov - GSI Helmholtz Centre for Heavy Ion Research
J. J. Valiente-Dobon - Legnaro National Laboratories
P. M. Walker - University of Surrey
H. J. Wollersheim - GSI Helmholtz Centre for Heavy Ion Research
P. J. Woods - University of Edinburgh
Publication Details: Physical review letters, Vol.113(2), pp.022702-022702
Publisher: Amer Physical Soc
Number of pages: 5
Grant note: EPSRC; UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC) STFC (UK); UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) ST/J000051/1; ST/J000132/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Italian INFN; Istituto Nazionale di Fisica Nucleare (INFN) 22540310 / Grants-in-Aid for Scientific Research; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; Grants-in-Aid for Scientific Research (KAKENHI) program Ingenio, Consolider CPAN Swedish Research Council; Swedish Research Council for Health Working Life & Welfare (Forte); Swedish Research Council Formas 2010/57 / Galician Regional Government under Unidades Competitivas German BMBF; Federal Ministry of Education & Research (BMBF) National Measurement Office (NMO) 06KY9136I / BMBF; Federal Ministry of Education & Research (BMBF) FPA2007-62652; FPA2008-6419-C02-01; FPU-AP2007-04543 / Spanish MICINN; Ministry of Science and Innovation, Spain (MICINN); Spanish Government 506065 / EU Access to Large Scale Facilities Programme (Eurons, EU Contract) ST/J000051/1; ST/J000132/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
Identifiers: 9918904308331
Academic Unit: King Abdulaziz City for Science & Technology
Language: English
Resource Type: Journal article