Va. Morozov, EFFECT OF THE CLOSING OF SHELLS ON THE MULTIPOLE MIXING PARAMETER DELTA(E2 M1) IN L-FORBIDDEN MAGNETIC DIPOLE TRANSITIONS/, Physics of atomic nuclei, 56(8), 1993, pp. 1009-1012
The values of the reduced multipole mixing parameters delta(E2/M1)/E(g
amma) in 1-forbidden MI transitions are analyzed. It is shown that the
se parameters take values that are minimal in absolute magnitude when
shells or subshells close in nuclei. Moreover, it follows from an anal
ysis of the forbiddenness factors F(MI) that the number Z = 15, like N
= 15, is magic.