The 153Sm nucleus: An experimental and theoretical study

The level structure of ¹⁵³Sm has been studied by means of the ¹⁵⁰Nd(α, n)¹⁵³Sm reaction. The experiment included measurements of the γ-γ coincidences and γ-ray yield as a function of projectile energy. The rotational band built on the $\text{11}\text{2}{}^{\mathrm{?}}$505] Nilsson orbital was observed up to spin $\text{19}\text{2}$, and two ΔI = 2 bands of positive parity were identified with spins up to $\text{19}\text{2}\text{and}\text{21}\text{2}$, respectively. These bands are associated with the $\text{i}{}_{\mathrm{<mtext>13</mtext><mtext>2</mtext>}}$ single-particle structure.The data obtained in the present work together with data available in the literature are compared to the result of a particle-rotor coupling calculation. The ¹⁵³Sm nucleus is found to be a wellbehaved rotor. An appropriate single-particle level scheme for ¹⁵³Sm is established.