 |
Journal articles
Approaching complete low-spin spectroscopy of $^{210}$Bi with a cold-neutron capture reaction
Abstract : The low-spin structure of the 210Bi nucleus was investigated in the neutron capture experiment 209Bi(n,γ )210Bi
performed at ILL Grenoble at the PF1B cold-neutron facility. By using the EXILL multidetector array, consisting
of 46 high-purity germanium crystals, and γγ-coincidence technique, 64 primary γ rays were observed (40
new) and a total number of 70 discrete states (33 new) were located below the neutron binding energy in 210Bi.
The analysis of the angular correlations of γ rays provided information about transitions multipolarities, which
made it possible to confirm most of the previously known spin-parity assignments and helped establish new ones.
The obtained experimental results were compared to shell-model calculations involving one-valence-proton,
one-valence-neutron excitations outside the 208Pb core. It has been found that while up to the energy of ∼2 MeV
each state observed in 210Bi has its calculated counterpart; at higher excitation energies some levels cannot be
described by the valence particle couplings. These states may arise from couplings of valence particles to the 3−
octupole phonon of the doubly magic 208Pb core and may serve as a testing ground for models which describe
single particle-phonon excitations.
http://hal.in2p3.fr/in2p3-01310737
Contributor : Michel Lion <>
Submitted on : Tuesday, May 3, 2016 - 10:07:01 AM
Last modification on : Tuesday, May 11, 2021 - 11:36:48 AM
Contributor : Michel Lion <>
Submitted on : Tuesday, May 3, 2016 - 10:07:01 AM
Last modification on : Tuesday, May 11, 2021 - 11:36:48 AM
Links full text
