Abstract

We have calculated binding energy, reduced transition probabilities and deformation parameter in ^{69,71,73,75,77,79}As nuclei. The energies of projectile-like fragments and Q-value in ⁷⁶Ge (635 MeV) + ¹⁹⁸Pt reactions are also calculated. The theoretical calculations of projectile like fragments (PLFs) energies are compared with the experimental values. The systematic energies for 9/2⁺ 5/2^- de-excitation of those nuclei indicate maximum deformation at N=42. The decrease in excitation level of the 9/2⁺ state from ⁶⁹As to ⁷⁹As provides some evidence for decreasing quadruple  “softness” towards the closed neutron shell at N = 40. We have reported single and coincidence g-ray spectroscopy of ⁷⁹As by deep-inelastic collision ⁷⁶Ge (635 MeV) + ¹⁹⁸Pt. The systematic isomeric level and reduced transition probabilities of ^{69,71,73,75,77,79}As nuclei have been investigated.

Key words: Q-value, reduced transition probabilities, projectile like fragments.