Alpha-particle emission from the reaction 1354 MeVHo165+Ta181

Abstract

The emission of $\ensuremath{\alpha}$ particles from the deep-inelastic reaction 1354 MeV $^{165}\mathrm{Ho}$ + $^{181}\mathrm{Ta}$ has been studied. Alpha particles were detected in coincidence with a projectilelike fragment, both in and out of the reaction plane. Average velocity diagrams, $\ensuremath{\alpha}$-particle energy spectra as a function of angle, and $\ensuremath{\alpha}$-particle angular distributions are presented. The in-plane data show that the bulk of the $\ensuremath{\alpha}$ particles in coincidence with the deep-inelastic exit channel can be explained by evaporation from the fully accelerated fragments. The out-of-plane $\ensuremath{\alpha}$-particle angular distribution data together with gamma-ray multiplicity data from previous work give a consistent picture of the transfer and partitioning of angular momentum between the two fragments.NUCLEAR REACTIONS $^{181}\mathrm{Ta}(^{165}\mathrm{Ho}, \mathrm{HI}\ensuremath{\alpha})$${E}_{\mathrm{lab}}=1354$ MeV: measured ${\ensuremath{\sigma}}_{\ensuremath{\alpha}}({E}_{\ensuremath{\alpha}}, {\ensuremath{\theta}}_{\ensuremath{\alpha}}, {\ensuremath{\varphi}}_{\ensuremath{\alpha}})$, in- and out-of-plane anisotropies; deduced $\ensuremath{\alpha}$-particle multiplicity, nuclear temperature.