The level densities and \gamma -strength functions of the almost spherical 148Sm and 149Sm nuclei have been extracted. The temperature curve, derived within the framework of the micro canonical ensemble, shows structures, which we associate with the break up of Cooper pairs. The nuclear heat capacity is deduced within the framework of the canonical ensemble and exhibits an S-shape as a function of temperature indicating a phase transition. The results are compared to the results for well deformed 161,162Dy and 171,172Yb isotopes.
PACS numbers: 21.10.Ma, 24.10.Pa, 21.10.Pc, 27.60.+j
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