Studies of <super>152</super>Gd, <super>152</super>Sm and <super> 182</super>W nuclei using a dual-parameter energy-time spectrometer

Abstract

The decay schemes of three intermediate mass nuclei, 152Gd, 152Sm and 182W were studied using a dual-parameter energy-time spectrometer employing Ge (Li) detectors for gamma-gamma coincidence measurements.

The applicability of current nuclear models to the properties of these nuclei were investigated. In particular these nuclei were chosen to test the interacting boson model as they spanned the vibrational SU(5) limit ( 152Gd), through the transitional SU(5) to SU(3) limit (152 Sm), to the rotational SU(3) limit (182W).

The half-lives of four nuclear states which lie in the nanosecond range were measured using the technique of delayed coincidence with plastic-Ge (Li) detectors. These values were used to calculate the absolute reduced transition probabilities for transitions depopulating these nuclear states.

New energy levels have been suggested as a result of the observation of new transitions in singles spectra, and their existence confirmed from coincidence data. The energy level schemes were constructed; nuclear properties of the levels deduced and compared with model predictions.