Brazilian Journal of Physics
Print version ISSN 0103-9733
RAELE, Marcus Paulo; ZAMBONI, Cibele Bugno; ZAHN, Guilherme Soares and GENEZINI, Frederico Antonio. Decay of 155Sm. Braz. J. Phys. [online]. 2005, vol.35, n.3b, pp. 839-842. ISSN 0103-9733. http://dx.doi.org/10.1590/S0103-97332005000500033.
The beta decay of 155Sm (T1/2 ~ 22min) has been investigated by gamma spectroscopy measurements. The single and coincidence spectra were taken using HPGe detectors with high energy resolution. The energy and relative intensities of 42 g-rays have been determined, most of them with a better precision than previously. The g-transitions at 205.7keV and 224.8keV were observed for the first time and 40 of them were confirmed and 39 of them placed in the decay scheme. The present results, together with the results of earlier studies, allows to confirm the energy levels, in the energy range 0.05-1.6MeV, as well as the assignments of spin for most of them.