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Probing the shell valence structure underlying the B(E2: 0+->2+) for N,Z~40:preponderance of the p-n interaction over the sub-shell closures.
Isabelle Deloncle1, Brigitte Roussiere2

The very simple product of the number of particles by the number of holes appearing in theexpression of the reduced B(E2:0+->2+) transition probability of even-even nuclei obtained fromthe extension of the seniority scheme is used to analyze the experimental B(E2:0+->2+) values in the Cr up to Se isotopes. A new interpretation is given to the B(E2:0+->2+) measured in 68Ni and 70Zn. The B(E2:0+->2+) features of the even-even nuclei between Ni and Se with neutron number ranging from 28 up to 50 fit in with a global scenario involving p-n interaction. The evolution of the B(E2:0+->2+) curves presenting very large values is amazingly reproduced by very schematic binomial calculations.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
Physique/Physique Nucléaire Théorique
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