Abstract
The nucleus 98 Ru has been investigated by means of γ - γ coincidence, γ - γ angular correlation and K-internal conversion coefficient measurements. The results have led to spin-parity assignment to several levels and to the determination of E 2/ M 1 mixing ratios for the most intense transitions.
Highlights
Even ruthenium isotopes are situated in a region of transition from vibrational to γ-unstable nuclei
For some isotopes, an extended comparison of experimental and calculated values was prevented by the lack of many important spectroscopic data, such as a definite spin-parity assignment to several levels
In–beam γ–γ angular correlation measurements were performed in three separate runs, for a total measuring time of about 80 hours
Summary
Even ruthenium isotopes are situated in a region of transition from vibrational to γ-unstable nuclei. They have been the object of a variety of theoretical analyses along the years, ranging from microscopic calculations [1] to the search for critical-point nuclei [2]. To provide new spectroscopic data useful to the interpretation of the properties of low-lying states in the ruthenium chain, we have performed γ-γ angular correlation and K-internal conversion coefficient measurements in 98Ru. Our study has led to an improved knowledge of the decay scheme, to the spin-parity assignment to several levels, and to the determination of E2/M1 mixing ratios for the most intense transitions
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