Continuumγ-Ray Emission and Angular-Momentum Dissipation in the De-excitation ofK39Se

The dissipation of angular momentum during the particle-emission and photon-emission stages of de-excitation of ${}_{}{}^{39}{}_{}{}^{}\mathrm{K}$ and Se has been determined from measurements of the average multiplicity $〈N_{\gamma }〉$ and the average energy $〈E_{\gamma }〉$ of the continuum $\gamma$ rays, emitted in coincidence with the heavy recoiling evaporation residues produced in reactions induced by ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ projectiles. The energy and angular momentum dissipated in $\gamma$-ray emission is independent of projectile energy but increases with atomic number of the residual nucleus.