@Article{Watanabe+Montaner-Piza2021,
author="Watanabe, H. et al
and Montaner-Piza, A.",
title="Impact of shell evolution on Gamow-Teller beta decay from a high-spin long-lived isomer in Ag-127",
journal="Physics Letters B",
year="2021",
publisher="Elsevier",
volume="823",
pages="136766--6pp",
optkeywords="Shell evolution; Gamow-Teller beta decay; Isomer; Ag-127; Radioactive isotope beam",
abstract="The change of the shell structure in atomic nuclei, so-called {\textquoteleft}{\textquoteleft}nuclear shell evolution{\textquoteright}{\textquoteright}, occurs due to changes of major configurations through particle-hole excitations inside one nucleus, as well as due to variation of the number of constituent protons or neutrons. We have investigated how the shell evolution affects Gamow-Teller (GT) transitions that dominate the beta decay in the region below Sn-132 using the newly obtained experimental data on a long-lived isomer in Ag-127. The T-1/2 = 67.5(9) ms isomer has been identified with a spin and parity of (27/2(+)) at an excitation energy of 1942(-20)(+14) keV, and found to decay via an internal transition of an E3 character, which competes with the dominant beta-decay branches towards the high-spin states in Cd-127. The underlying mechanism of a strong GT transition from the Ag-127 isomer is discussed in terms of configuration-dependent optimization of the effective single-particle energies in the framework of a shell-model approach.",
optnote="WOS:000719296400003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5041), last updated on Mon, 13 Dec 2021 08:51:10 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2021.136766",
opturl="https://doi.org/10.1016/j.physletb.2021.136766",
language="English"
}