Investigation Of High-Spin States In Pm-143

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION(2001)

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Abstract
High-spin states in Pm-143 have been investigated via the Te-128(F-19, 4n gamma) Pm-143 reaction using techniques of in-beam gamma -spectroscopy. gamma -ray singles, gamma-gamma coincidences, gamma -ray anisotropies and DCO ratios have been measured. Based on these measurements, the level scheme of Pm-143 has been extended up to excitation energy of 10535. 4keV including 32 new gamma rays deexciting of 17 new levels. The yrast levels in Pm-143 can be understood qualitatively in the framework of a weak-coupling model.
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Key words
anisotropy, DCO ratio, level scheme, weak-coupling model
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