Low‐lying Collective States in 136Ba

M Scheck, Sanjoy Mukhopadhyay,B P Crider,S N Choudry,Esmat Elhami, E E Peters,M T Mcellistrem,J N Orce,S W Yates

CAPTURE GAMMA‐RAY SPECTROSCOPY AND RELATED TOPICS: Proceedings of the 13th#N#International Symposium on Capture Gamma‐Ray Spectroscopy and Related Topics（2009）

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摘要

Low‐lying collective states in 136Ba were investigated with (n,n′γ) techniques, including Doppler‐shift attenuation lifetime measurements. The level spins, lifetimes, branching ratios, multipole‐mixing ratios and transition strengths reveal candidates for symmetric‐phonon states up to third order. The 2ms+ mixed‐symmetry state was confirmed as unfragmented and a candidate for a [21+⊗2ms+]3+ two‐phonon mixed‐symmetry state is proposed.

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关键词

neutron scattering,doppler shift

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