Pre-equilibrium and equilibrium emission of neutrons inCd114(α,xn)reactions
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Abstract
The $^{114}\mathrm{Cd}(\ensuremath{\alpha},\mathit{xn})$ reaction has been studied for ${E}_{\ensuremath{\alpha}}=35\text{\ensuremath{-}}55\phantom{\rule{0.3em}{0ex}}\mathrm{MeV}$ following neutron emission and $\ensuremath{\gamma}$-ray deexcitation. Excitation functions of various $(\ensuremath{\alpha},\mathit{xn})$ channels measured from $\ensuremath{\gamma}$-ray yields have been compared with theoretical calculations based on ALICE-91 and CASCADE codes. Neutron energy spectra were generated from $\ensuremath{\gamma}$-gated neutron time of flight spectra. Neutron energy spectra corresponding to $(\ensuremath{\alpha},3n)$ and $(\ensuremath{\alpha},4n)$ reactions at ${E}_{\ensuremath{\alpha}}=50\phantom{\rule{0.3em}{0ex}}\mathrm{MeV}$ have been theoretically reproduced taking into account the contributions of equilibrated source with level density parameter $a=A/11$, along with the contributions from the pre-equilbrium process.
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