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.; Levine, H.; Zamfir, N.; Cakirli, Rabia; Casten, R.; Ai, H.; Beausang, C.; Gurdal, G.; Heinz, A.; Qian, J.; Meyer, D.; Pietralla, N.; Werner, V.

doi:10.1103/physrevc.74.024302

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

Atıf İçin Kopyala

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

PHYSICAL REVIEW C, cilt.74, sa.2, 2006 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 74 Sayı: 2
Basım Tarihi: 2006
Doi Numarası: 10.1103/physrevc.74.024302
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Üniversitesi Adresli: Evet

Özet

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.