Single-proton states in 151Pm

The ${}^{152}\text{Sm}\text{(}\text{t}\text{, α)}{}^{151}\text{Pm}$ reaction was studied using 17 MeV polarized tritons from the tandem Van de Graaff accelerator at the Los Alamos Scientific Laboratory. The α-particles were analyzed using a Q3D magnetic spectrometer and detected with a helical-cathode position-sensitive counter. The overall resolution was ～ 18 keV FWHM. Measurements of the ¹⁵⁰Nd(³He, d)¹⁵¹Pm reaction were made using 24 MeV ³He beams from the McMaster University tandem accelerator. The deuteron spectra were analyzed with a magnetic spectrograph using photographic emulsions for detectors, yielding a resolution of ～ 13 keV FWHM. By comparing the measured angular distributions of ($\text{t}\text{, α}$) and (³He, d) cross sections and ($\text{t}\text{, α}$) analyzing powers with DWBA predictions it was possible to assign spins and parities to many levels. The present results confirm earlier assignments of rotational bands based on the low-lying $\text{5}\text{2}{}^{\mathrm{+}}\text{413],}\text{5}\text{2}{}^{\mathrm{?}}\text{532],}\text{3}\text{2}{}^{\mathrm{+}}\text{411]}\text{and}\text{1}\text{2}{}^{\mathrm{+}}\text{420]}$ orbitals. In addition, states at higher excitation have now been assigned to the $\text{1}\text{2}{}^{\mathrm{+}}\text{411]}\text{and}\text{7}\text{2}{}^{\mathrm{+}}\text{404]}$ orbitals, and members of the $\text{3}\text{2}{}^{\mathrm{+}}\text{422],}\text{5}\text{2}{}^{\mathrm{+}}\text{402],}\text{3}\text{2}{}^{\mathrm{?}}\text{541]}\text{and}\text{7}\text{2}{}^{\mathrm{?}}\text{523]}$ bands are tentatively proposed. The spectroscopic strengths can be explained reasonably well by the Nilsson model when pairing and Coriolis mixing effects are included.