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Extended M1 sum rule for excited symmetric and mixed-symmetry states in nuclei | | N. A. Smirnova
; N. Pietralla
; A. Leviatan
; J. N. Ginocchio
; C. Fransen
; | | Date: |
10 Aug 2001 | | Journal: | Phys.Rev. C65 (2002) 024319 | | Subject: | nucl-th | | Abstract: | A generalized M1 sum rule for orbital magnetic dipole strength from excited symmetric states to mixed-symmetry states is considered within the proton-neutron interacting boson model of even-even nuclei. Analytic expressions for the dominant terms in the B(M1) transition rates from the first and second $2^+$ states are derived in the U(5) and SO(6) dynamic symmetry limits of the model, and the applicability of a sum rule approach is examined at and in-between these limits. Lastly, the sum rule is applied to the new data on mixed-symmetry states of 94Mo and a quadrupole d-boson ratio $nd(0^+_1)/nd(2^+_2) approx 0.6$ is obtained in a largely parameter-independent way | | Source: | arXiv, nucl-th/0108025 | | Services: | Forum | Review | PDF | Favorites | |
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