Nuclear data sheets for A = 54

Effects of configuration mixing on predominantlyf 7 2/n states inA=52?55 nuclei

“…1, extended calculations have been pertbrmed in the f~/2+f.~/21 .r model space, which will be called from now on the en- An amount of 2.60 MeV is subtracted from the experimental spectrum [20] for comparison with other columns b The values of these matrix elements were kept fixed, see text larged model space, in contrast to the simple f~}2 model space. 1, extended calculations have been pertbrmed in the f~/2+f.~/21 .r model space, which will be called from now on the en- An amount of 2.60 MeV is subtracted from the experimental spectrum [20] for comparison with other columns b The values of these matrix elements were kept fixed, see text larged model space, in contrast to the simple f~}2 model space.…”

“…The (f~z)J=O,T= 1 matrix element is taken such that the energy gaps between the f7/2 and P3/2 orbit around both 4SCa and 56Ni are reproduced reasonably" well, see Table 1 b. Experimental data from [20] matrix elements obtained in the f7"/2 model space are in very good agreement with the positions of the T=0 states in 54Co, see Fig. An identical approach has been followed by using for the 52 two-body matrix elements those of Kuo and Brown [8] including a modification suggested by Pasquini and Zuker [12].…”

“…In the f~"/2 model the g-factors of all states in the N =28 isotones are equal to the f7/2 proton g-factor which is given by 1 [20,22,23] values are about 1.40 (Fig. 4).…”

Vie moyenne de l'état 8+ à 6,38 MeV dans 54Fe

“…E2-transition strengths in 54Fe are discussed and compared to the predictions of shell-model calculations. LE [1,2]. D'autres etats de moment angulaire total plus eleve (haut spin) peuvent etre prevus en considerant des excitations de neutrons vers les orbites 2p3/2 [3] lf5/2 ou 2pl/2 [4] : la cassure du cceur des 28 neutrons a ete, en effet, montree necessaire pour expliquer d'une maniere satisfaisante les proprietes des autres isotones N = 28.…”