The ($d, t$) reaction on the isotopes ${}_{}{}^{147}{}_{}{}^{}\mathrm{Sm}$ and ${}_{}{}^{149}{}_{}{}^{}\mathrm{Sm}$ has been investigated at a deuteron energy of 17 MeV; the ($d, p$) reaction on the isotope ${}_{}{}^{147}{}_{}{}^{}\mathrm{Sm}$ at a deuteron energy of 12.5 MeV. Angular distributions were taken in 2.5° steps in the range of $7.5\le {\theta }_{\mathrm{lab}}\le 35°$ and in 5° steps for ${\theta }_{\mathrm{lab}}>35\mathrm{}°$. The experimental energy resolution is 9-11 keV for the pickup reactions and 10-12 keV for the stripping case. Spectroscopic factors and $l$ transfers were extracted by distorted wave Born approximation analysis. Eighty-three states in ${}_{}{}^{146}{}_{}{}^{}\mathrm{Sm}$ are observed; $l$ transfer and $J^{\pi }$ limits are given for 36 of them. For the nucleus ${}_{}{}^{148}{}_{}{}^{}\mathrm{Sm}$ 97 states are observed; $l$ transfers and $J^{\pi }$ limits are given for 63 of them. Reasonable $l=3\mathrm{}$, $l=1\mathrm{}$, and $l=0\mathrm{}$ summed strengths have been found. Comparison with ($p, t$) and ($t, p$) studies of the same final nuclei investigated here is made in a phenomenological collective picture.

NUCLEAR REACTIONS ${}_{}{}^{147}{}_{}{}^{}\mathrm{Sm}(d, t)$ and ${}_{}{}^{149}{}_{}{}^{}\mathrm{Sm}(d, t)$, $E_d=17\mathrm{}$ MeV. ${}_{}{}^{147}{}_{}{}^{}\mathrm{Sm}(d, p)$, $E_d=12.5\mathrm{}$ MeV. Measured $\sigma (E_t, \theta )$, $\sigma (E_p, \theta )$; ${}_{}{}^{146,148}{}_{}{}^{}\mathrm{Sm}$ level energies, resolution 9-12 keV, enriched targets, DWBA analysis.

• Received 3 April 1975

DOI:https://doi.org/10.1103/PhysRevC.12.417