Browsing by Author "S.F. Ashley"

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Emerging collectivity from the nuclear structure of Xe 132: Inelastic neutron scattering studies and shell-model calculations
(American Physical Society, 2019) E.E. Peters; A.E. Stuchbery; A. Chakraborty; B.P. Crider; S.F. Ashley; A. Kumar; M.T. McEllistrem; F.M. Prados-Estévez; S.W. Yates
Inelastic neutron scattering was used to study the low-lying nuclear structure of Xe132. A comprehensive level scheme is presented, as well as new level lifetimes, multipole mixing ratios, branching ratios, and transition probabilities. Comparisons of these data as well as previously measured E2 strengths and g factors are made with new shell-model calculations for Xe132,134,136 to explore the emergence of collectivity in the Xe isotopes with N<82 near the closed shell. © 2019 American Physical Society.
Level lifetimes and the structure of Xe 134 from inelastic neutron scattering
(American Physical Society, 2017) E.E. Peters; A. Chakraborty; B.P. Crider; S.F. Ashley; E. Elhami; S.F. Hicks; A. Kumar; M.T. McEllistrem; S. Mukhopadhyay; J.N. Orce; F.M. Prados-Estévez; S.W. Yates
The level structure of Xe134 was studied with the inelastic neutron scattering reaction followed by γ-ray detection. A number of level lifetimes were determined for the first time with the Doppler-shift attenuation method and the low-lying excited states were characterized. From this new spectroscopic information, the third excited state, a 0+ level which had only been observed in a previous inelastic neutron scattering study, was verified. Reduced transition probabilities were calculated; comparisons were drawn with a vibrational description of the nucleus and found lacking. The 3- octupole phonon has been confirmed, and the complete negative-parity multiplet resulting from the ν(1h11/22d3/2) configuration has also been tentatively identified for the first time in the N=80 isotones. © 2017 American Physical Society.