Chiral Doublet Structures in Odd-Odd N=75 Isotones: Chiral Vibrations

Starosta, K.; Koike, T.; Chiara, C. J.; Fossan, D. B.; Lafosse, D. R.; Hecht, A. A.; Beausang, C. W.; Caprio, M. A.; Cooper, J. R.; Krücken, R.; Novak, J. R.; Zamfir, N. V.; Zyromski, K. E.; Hartley, D. J.; Balabanski, D. L.; Zhang, J.; Frauendorf, S.; Dimitrov, V. I.

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Chiral Doublet Structures in Odd-Odd N=75 Isotones: Chiral Vibrations

Starosta, K.; Koike, T.; Chiara, C. J.; Fossan, D. B.; Lafosse, D. R.; Hecht, A. A.; Beausang, C. W.; Caprio, M. A.; Cooper, J. R.; Krücken, R.; Novak, J. R.; Zamfir, N. V.; Zyromski, K. E.; Hartley, D. J.; Balabanski, D. L.; Zhang, J.; Frauendorf, S.; Dimitrov, V. I.

Abstract

New sideband partners of the yrast bands built on the i
p h _11/2 n h _11/2
configuration were identified in _55Cs, ₅₇La, and ₆₁Pm
N = 75 isotones of ¹³⁴Pr.
These bands form with ¹³⁴Pr unique doublet-band systematics suggesting
a common basis. Aplanar solutions of 3D tilted axis cranking
calculations for triaxial shapes define left- and right-handed chiral
systems out of the three angular momenta provided by the valence
particles and the core rotation, which leads to spontaneous chiral symmetry
breaking and the doublet bands. Small energy differences between the

Phys. Rev. Lett. 86 (2001) 971

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