Experimental Investigation of the 02+ Band in Sm154 As a Β-Vibrational Band
Physics letters B(2014)
摘要
A study of Sm154 through γ-ray and internal conversion electron coincidence measurements was performed using the Silicon And GErmanium spectrometer (SAGE). An upper limit for the ρ2(E0;22+→21+) and measurement of the ρ2(E0;42+→41+) monopole transitions strengths were determined. The extracted transition strength for each is significantly lower than that predicted by either the Bohr and Mottelson β-vibration description or the interacting boson model. Hence, the long standing interpretation of these states as a collective band built on the 02+ state, which is conventionally assigned as a Bohr and Mottelson β vibration is questionable.
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关键词
Internal conversion electrons,Gamma ray,Spectroscopy,Electric monopole,Collective models,Rare-earth
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