Fermionic-bosonic couplings in a weakly-deformed odd-mass nucleus, $^{93}_{41}$Nb

Details Fermionic-bosonic couplings in a weakly-deformed odd-mass nucleus, $^{93}_{41}$Nb Fermionic-bosonic couplings in a weakly-deformed odd-mass nucleus, $^{93}_{41}$Nb

2010-07-16

arxiv.org/abs/1007.2865v2

Physics

Nuclear Physics

Nuclear Experiment

13 pages, 5 figures

Scientific paper

A comprehensive decay scheme of $^{93}$Nb below 2 MeV has been constructed from information obtained with the $^{93}$Nb(n,n$^\prime$$\gamma$) and $^{94}$Zr(p,2n$\gamma$$\gamma$)$^{93}$Nb reactions. Branching ratios, lifetimes, transition multipolarities and spin assignments have been determined. From $M1$ and $E2$ strengths, fermionic-bosonic excitations of isoscalar and isovector character have been identified from the weak coupling $\pi1g_{9/2}$$\otimes$$^{92}_{40}$Zr and $\pi2p_{1/2}^{-1}$$\otimes$$^{94}_{42}$Mo configurations. A microscopic interpretation of such excitations is attained from shell-model calculations using low-momentum effective interactions.

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