ReactionAl27+αatEα=140MeV: I

Abstract

Detailed results of the investigation of the in-beam $\ensuremath{\gamma}$ rays from 140 MeV $\ensuremath{\alpha}$ particles incident on the deformed nucleus $^{27}\mathrm{Al}$ are presented. They are supplemented by experimental evidence obtained from the observed differential cross section measurements for $p$, $d$, $t$, $h$, and $\ensuremath{\alpha}$ particles in the discrete portion of the energy spectra. Striking spectroscopic similarities are observed for the strongly excited states in residual nuclei both near and considerably removed in $N$ and $Z$ from the target nucleus. Some of these involve related collective states exhibiting strong quadrupole excitations.NUCLEAR REACTIONS $^{27}\mathrm{Al}$($\ensuremath{\alpha}$,$p$), ($\ensuremath{\alpha}$,$d$), ($\ensuremath{\alpha}$,$t$), ($\ensuremath{\alpha}$,$h$), ($\ensuremath{\alpha}$,${\ensuremath{\alpha}}^{\ensuremath{'}}$), ($\ensuremath{\alpha}$,$x\ensuremath{-}\ensuremath{\gamma}$), ${E}_{\ensuremath{\alpha}}=140$ MeV; measured ${E}_{\ensuremath{\gamma}}$, ${\ensuremath{\sigma}}_{\ensuremath{\gamma}}$, cross sections for producing specific levels in residual nuclei, Doppler broadening, $\ensuremath{\sigma}(\ensuremath{\theta},E)$ for discrete energy groups $p$, $d$, $t$, $h$, $\ensuremath{\alpha}$; deduce reaction channel characteristics. Ge(Li) detector.