Spectroscopy of 98Ru.

The 98Ru nucleus, populated via the 97Mo(³He,2n) reaction, has been investigated by means of K-internal conversion coefficient, γ-ray angular distribution, γ-γ coincidence, and γ-γ angular correlation measurements. The results have led to an improved knowledge of the excitation energy pattern via the identification of new levels and transitions. New information on spin and parities of many levels as well as on mixing ratios of several transitions has been obtained. The presence of large M1 components in many transitions definitely excludes the possibility of considering 98 as a nucleus having a structure very close to the vibrational one and points to the need of an enlarged framework for a successful description. [ABSTRACT FROM AUTHOR]