Measurements of vector analyzing power in the (d

Abstract

Measurements of vector analyzing power have been carried out for the (d\ensuremath{\rightarrow},t) reaction on targets of $^{54}\mathrm{Cr}$, $^{56}\mathrm{Fe}$, and $^{64}\mathrm{Ni}$ at deuteron energies of 15, 16, and 18 MeV. Data were taken over the angular range 10\ifmmode^\circ\else\textdegree\fi{}--55\ifmmode^\circ\else\textdegree\fi{} for transitions to low-lying states of ${\mathit{J}}^{\mathrm{\ensuremath{\pi}}}$=(1/2,3/2, 5) / 2 ,7/2${)}^{\mathrm{\ensuremath{-}}}$ using a position-sensitive counter telescope in the focal plane of an Enge spectrograph. Transitions to states of ${\mathit{j}}^{\mathrm{\ensuremath{\pi}}}$=3/${2}^{\mathrm{\ensuremath{-}}}$ or 7/${2}^{\mathrm{\ensuremath{-}}}$ show only slight dependence on incident energy, while those to states of ${\mathit{j}}^{\mathrm{\ensuremath{\pi}}}$=1/${2}^{\mathrm{\ensuremath{-}}}$ or 5/${2}^{\mathrm{\ensuremath{-}}}$ show a greater dependence, and greater variations between different states. Distorted-wave Born approximation calculations show at best qualitative agreement with the data. The results indicate that measurements of VAP for the (d\ensuremath{\rightarrow},t) reaction at low energies will not provide accurate estimates of j mixing for transitions on odd-A targets.