Published in
American Physical Society, Physical Review Letters, 7(118)
DOI: 10.1103/physrevlett.118.072701
Links
- ORCID
- ORCID
- ORCID
- ORCID
- ORCID
- ORCID
- ORCID
- ORCID
- American Physical Society | PDF
- [hal.in2p3.fr]
- [eprints.brighton.ac.uk] | PDF
- [digital.csic.es] | PDF
- [real.mtak.hu] | PDF
Tools
94 β -Decay Half-Lives of Neutron-Rich Cs55 to Ho67 : Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation
,
S. Nishimura,
G. Lorusso,
P. Möller,
E. Ideguchi,
P.-H. Regan,
G. S. Simpson,
P.-A. Söderström,
P. M. Walker ,
H. Watanabe,
Z. Y. Xu ,
H. Baba ,
F. Browne,
R. Daido,
P. Doornenbal
and other authors.
Full text: Download
Abstract
The β-decay half-lives of 94 neutron-rich nuclei 144−151Cs, 146−154Ba, 148−156La, 150−158Ce, 153−160Pr, 156−162Nd, 159−163Pm, 160−166Sm, 161−168Eu, 165−170Gd, 166−172Tb, 169−173Dy, 172−175Ho, and two isomeric states 174mEr, 172mDy were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for 58Ce, 59Pr, 60Nd, and 62Sm, and N=105 for 63Eu, 64Gd, 65Tb, and 66Dy. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.