Authors: Hwang, J.K.; Hamilton, J.H.; Ramayya, A.V.

Source: Journal of Physics G: Nuclear and Particle Physics, Volume 40, Number 1, January 2013 , pp. 15106-15119(14)

Publisher: IOP Publishing

Abstract:

Excited states in ^88,89,90,92Sr are reanalyzed by assigning new spins and parities according to the published DCO ratios (R_DCO). Possible candidates for the two-POV 6⁺ states are proposed in ^88,90,92Sr not only based on spins but also by investigating the state energy and E2 transition energy systematics between ⁹⁶Zr, ¹⁴⁶Gd and the neighboring Sr isotopes. Multiple excited states (multiplets) with the same configuration in ^88,89Sr are interpreted as the weak coupling of a 2⁺ one-phonon quadrupole or a 3⁻ one-phonon octupole vibration to the excited 8⁺ state for ⁸⁸Sr and a 3⁻ one-phonon octupole vibration to the excited 21/2⁺ state for ⁸⁹Sr. The 8⁺⊗2⁺ quintuplet and 8⁺⊗3⁻ multiplet in ⁸⁸Sr and 8⁺⊗3⁻ septuplet in ⁸⁹Sr are reported. Two excited states with the new spins and parities of 10⁺ and 12 ⁺ in ^90,92Sr have the configurations of 8⁺⊗2⁺ and 8⁺⊗4⁺, respectively. Also, 8⁺⊗2⁺ quintuplets and 8⁺⊗3⁻ multiplets are proposed for ^94,96Zr.

Document Type: Research article

DOI: http://dx.doi.org/10.1088/0954-3899/40/1/015106

Publication date: 2013-01-01

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