High-spin states in boson models with applications to actinide nuclei

Abstract

We use the 1/$N$ expansion formalism in a systematic study of high-spin states in the $sd$ and $sdg$ boson models with emphasis on spin dependence of moment of inertia and E2 transitions. The results are applied to the high-spin states in the actinide nuclei ${}^{232}$Th, ${}^{234-238}$U, where the need for $g$ bosons is especially acute but until now, no realistic calculation existed. We find that the $d$-boson energy plays a crucial role in description of the high-spin data.

Comments: 11 pages Latex, 4 figures available upon request (to appear in Phys. Lett. B)