Year: 2008
Type: article
Abstract: Direct neutron capture reactions play an important role in nuclear astrophysics and applied physics. Since for most unstable short-lived nuclei it is not possible to measure the $(n,\ensuremath{\gamma})$ cross sections, $(d,p)$ reactions have been used as an alternative indirect tool. We analyze simultaneously ${}^{48}\mathrm{Ca}(d,p){}^{49}\mathrm{Ca}$ reactions at deuteron energies of $2,13,19,$ and 56 MeV and the thermal $(n,\ensuremath{\gamma})$ reaction at 25 meV. We include results for the ground state and the first excited state of $^{49}\mathrm{Ca}$. From the low-energy $(d,p)$ reaction, the neutron asymptotic normalization coefficient (ANC) is determined. Using this ANC, we extract the spectroscopic factor (SF) from the higher energy $(d,p)$ data and the $(n,\ensuremath{\gamma})$ data. The SF obtained through the 56-MeV $(d,p)$ data are less accurate but consistent with those from the thermal capture. We show that to have a similar dependence on the single-particle parameters as in the $(n,\ensuremath{\gamma})$, the $(d,p)$ reaction should be measured at 30 MeV.
Source: Physical Review C
Authors: A. M. Mukhamedzhanov, F. M. Nunes, P. Mohr
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2071938251