Excitation of States in Pb 207 by Pb 208 ( d , t ) , Pb 206 ( d , p ) , and Pb 207 ( d , d ′ ) Reactions

摘要: States up to 5.6 MeV in excitation energy ${\mathrm{Pb}}^{207}$ were studied by the ${\mathrm{Pb}}^{208}(d,t)$, ${\mathrm{Pb}}^{206}(d,p)$, and ${\mathrm{Pb}}^{207}(d,{d}^{\ensuremath{'}})$ reactions at a deuteron bombarding of 17 MeV. Over 100 states observed 70 angular distributions measured compared with distorted-wave Born approximation calculations for ($d,p$), ($d,t$) reactions. Special emphasis was placed on obtaining accurate energies compare those excited more than one reaction. In some two-hole-one-particle (2h-1p) are found be fragmented. The ${i}_{\frac{11}{2}}$ ${j}_{\frac{15}{2}}$ 2h-1p tentatively identified. Many weaker (less 5 \ensuremath{\mu}b/sr) transitions have which do not follow DWBA - possibly indicating other one-step reaction mechanisms. Observation indicate that ${\mathrm{Pb}}^{208}$ closed shell contains about $4.7% {(2{g}_{\frac{9}{2}})}^{2}$, $\ensuremath{\lesssim}4.7% {(3{d}_{\frac{5}{2}})}^{2}$, $\ensuremath{\lesssim}1.2% {(4{s}_{\frac{1}{2}})}^{2}$ particle-${\mathrm{Pb}}^{206}$ core admixture.