Speaker
Description
We present preliminary results from a recent investigation performed at ILL to study the presence of the negative-parity components in the structure of positive-parity states in atomic nuclei. In order to identify the candidates for such states one has to investigate the excited states in medium mass nuclei around N=88 using various probes. The first experiment was performed in Munich and was a two-neutron transfer reaction in order to find the correct energy of various levels and their total angular momentum. The second investigation was a beta-decay study to populate the low-spin states in 150Sm and to determine their gamma decay pattern. Therefore, the experiment performed at ILL using the 149Sm(n,g) reaction was concentrated on determining the decay pattern of the medium-spin levels and therefore, completes a series of experimental investigations on 150Sm. Gamma rays were detected using the FIPPS array composed of 16 clover detectors, eight of them being supplied by IFIN-HH. The reaction has populated a large number of states up to about 8 MeV with spin numbers typically around J= 4. Key information will be extracted from the decay of these states and their angular correlation measurements.
