Nuclei around N=82 closure shell are a fertile field of investigation to establish quasiparticule configurations and to test nuclear potential who predict high spin isomers in those nuclei. In this way, an experiment was performed in August 2009 at Jyväskylä laboratory to investigate these predicted high spin isomers in Nd nuclei.
We use a 48Ca+96Zr fusion-evaporation reaction to populate medium spin states. Experimental setup involved JUROGAM II germanium array around the target for a high efficiency detection of prompt gamma rays. Then the residual nuclei were transported by the RITU separator in few hundred of nanoseconds to the focal plane where the GREAT detector array was used to detect gamma rays issued from isomer decay.
Our first work on time spectra permit us to measure lifetime of four isomers, three of which stand in Nd isotopes considered in this work. The high quality data we obtained allows the measurement of these lifetime with high precision. The off-line analysis is still in progress and the prompt-delayed coincidences enable us to observe new feeding transitions in different isomers and to construct the level scheme above isomers.