electric quadrupole transition in neutron rich 32−42s-isotopes with different model spaces

The electromagnetic properties of some even neutron rich sulfur-isotopes 32−42 s are studied through the electric quadrupole transition (01+→21+). in particular, excitation energies ex, occupancies, electric quadrupole moments q, transition strengths b(e2), deformation parameters β2 and the coulomb inelastic electron scattering form factors are calculated for the adopted isotopes within the framework of shell model. the shell model calculations are performed with full sd-model space, psd - and sdpf - cross shell, using different interactions. the results are based on sdba and psdmk interactions for sulfur with n≤20, while sdpfk and sdpfu interactions are dependent for sulfur with n>20. the core polarization effects (cp) are included through the boher-mottelson (b−m) and standard (st) effective charges to obtain a reasonable description of the electric quadrupole moments and c2 form factors. the results of psdmk and sdba-interactions fail to reproduce the measured b(e2) strengths and deformation β2 for 32−36 s, except for 36 s nucleus is close to the measured value. the results for 38−42 s with both sdpfk and sdpfu interactions nicely confirm the measured values of b(e2) strengths and deformation β2 within the experimental error. the influence of the nuclear deformation parameter β2 on the location of the diffraction minima of c2 form factors are also indicated.