THE NUCLEAR STRUCTURE OF 24Na AND S O M E REMARKS ON THE NUCLEAR STRUCTURE OF 2SMg

The exper imental da ta on the 2aNa(d, p)Z4Na react ion at Ed = 7.8 MeV reported in a previous paper 1) (referred to as I) are used for a tentat ive interpreta t ion o f the even pari ty levels o f 24Na at low excitation. C ompar i son wi th the interpretat ion o f the nuclear s t ructure o f 25Mg leads to ass ignment o f rotat ional bands in ~4Na (table 5 and fig. 6). The spectroscopic da ta o f the (d, p) reaction on ~3Na and 2*Mg and the posi t ion o f the intrinsic states o f the rota t ional bands in 24Na and 25Mgyield a reasonable fit to the unified mode l for ~ ~ 0.2 at K = 0.08, to be cont rasted with a value o f ~ ~ 0.4 to 0.5 at K = 0.08 deduced f rom the magne t ic momen t , the total energy o f the nucleus in the Ni lsson mode l and the quadrupole m o m e n t s o f nuclei in this region. The rotat ion-part icle coupl ing distorts the rotat ional s t ructure o f 2~Na and 26Mg considerably. The unified model alone and this mode l including a residual central two-body interact ion between the two odd nucleons predict a g round state spin 1 + ins tead o f 4 + for ~4Na. Tak ing into account a two-body spin-orbi t force and a tensor force m a y yield a correct predict ion o f the g round state spin.