Revisiting anomalous B(E2;4(1)(+)-> 2(1)(+))/B(E2;2(1)(+)-> 0(1)(+)) values in Ru-98 and Pt-180

Williams E., Plettner C., McCutchan E. A., Levine H., Zamfir N. V., Cakirli R. B., ...More

PHYSICAL REVIEW C, vol.74, no.2, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 74 Issue: 2
  • Publication Date: 2006
  • Doi Number: 10.1103/physrevc.74.024302
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Istanbul University Affiliated: Yes


Recently, a set of nine nonmagic nuclei with anomalous values of the B(E2) ratio B-4/2 equivalent to B(E2;4(1)(+)-> 2(1)(+))/B(E2;2(1)(+)-> 0(1)(+)) < 1 were identified. Such values are outside the range allowed by current collective models. In the present work, the B(E2;4(1)(+)-> 2(1)(+)) values for two of these nuclei, Ru-98 and Pt-180, were re-measured to determine if the current literature values for these nuclei are correct. Ru-98 was studied in a Al-27(Ru-98,Ru-98(*)) Coulomb excitation experiment in inverse kinematics, while the lifetime of the 4(1)(+) state in Pt-180 was measured in a Sn-122(Ni-62, 4n)Pt-180 recoil distance method (RDM) experiment. For both nuclei, the remeasured B-4/2 values are well above 1, removing the deviations from collective models.