Breakdown of vibrational structure in Ru-98

Cakirli R. B. , Casten R., McCutchan E., Ai H., Amro H., Babilon M., ...More

PHYSICAL REVIEW C, vol.70, no.4, 2004 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 70 Issue: 4
  • Publication Date: 2004
  • Doi Number: 10.1103/physrevc.70.044312
  • Title of Journal : PHYSICAL REVIEW C


The nucleus Ru-98, the lightest collective Ru isotope with N>50, has been studied employing the (alpha,2n) reaction using YRAST Ball detectors. The new data, as well as a systematic set of limits on the intensities of unobserved transitions, reveal a structure that resembles a near harmonic vibrator spectrum up through the two-phonon triplet but show an almost complete breakdown of vibrator structure thereafter. These results are not understood theoretically and are at variance with previous interpretations of this nucleus. A rare anomaly in yrast B(E2) values is also pointed out.