Revisiting anomalous B(E2;41+→21+)/B(E2;21+→01+) values in 98Ru and 180Pt

被引：31
|
作者：
Williams, E. [1 ]
Plettner, C.
McCutchan, E. A.
Levine, H.
Zamfir, N. V.
Cakirli, R. B.
Casten, R. F.
Ai, H.
Beausang, C. W.
Gurdal, G.
Heinz, A.
Qian, J.
Meyer, D. A.
Pietralla, N.
Werner, V.
机构：
[1] Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06511 USA
[2] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[3] Istanbul Univ, Dept Phys, Istanbul, Turkey
[4] Univ Richmond, Dept Phys, Richmond, VA 23173 USA
[5] Clark Univ, Worcester, MA 01610 USA
[6] SUNY Stony Brook, Stony Brook, NY 11794 USA
[7] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany
来源：
PHYSICAL REVIEW C | 2006年 / 74卷 / 02期
关键词：
D O I：
10.1103/PhysRevC.74.024302
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
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.
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页数：6
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