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

Authors

E. Williams
C. Plettner
E. A. McCutchan
H. Levine
N. V. Zamfir
R. Cakirli
R. F. Casten
H. Ai
C. W. Beausang, University of RichmondFollow
G. Gurdal
A. Heinz
J. Qian
D. A. Meyer
N. Pietralla
V. Werner

DOI

10.1103/PhysRevC.74.024302

Abstract

Recently, a set of nine nonmagic nuclei with anomalous values of the B(E2) ratio B_4/2 ≡ B(E2; 4⁺₁ → 2⁺₁)/B(E2; 2⁺₁ → 0⁺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, ⁹⁸Ru and ¹⁸⁰Pt, were re-measured to determine if the current literature values for these nuclei are correct. ⁹⁸Ru was studied in a ²⁷Al(⁹⁸Ru,⁹⁸Ru^∗) Coulomb excitation experiment in inverse kinematics, while the lifetime of the 4⁺₁ state in ¹⁸⁰Pt was measured in a ¹²²Sn(⁶²Ni, 4n)¹⁸⁰Pt recoil distance method (RDM) experiment. For both nuclei, the remeasured B_4/2 values are well above 1, removing the deviations from collective models.

Document Type

Article

Publication Date

8-11-2006

Publisher Statement

Copyright © 2006 The American Physical Society. This article first appeared in Physical Review C 74, no. 2 (August 11, 2006): 024302:1-24302:6. doi:10.1103/PhysRevC.74.024302.

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Recommended Citation

Williams, E., C. Plettner, E. McCutchan, H. Levine, N. Zamfir, R. Cakirli, R. Casten, H. Ai, C. Beausang, G. Gürdal, A. Heinz, J. Qian, D. Meyer, N. Pietralla, and V. Werner. "Revisiting Anomalous B(E2;41 →21 )/B(E2;21 →01 ) Values in Ru98 and Pt180." Physical Review C 74, no. 2 (August 11, 2006): 024302:1-24302:6. doi:10.1103/PhysRevC.74.024302.