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Development of a gamma-gamma angular correlation digital instrumentation at LNE-LNHB
Sylvain Leblond1, Christophe Bobin1
1Université Paris-Saclay, CEA, List, Laboratoire National Henri Becquerel (LNE-LNHB), Palaiseau, F-91120, France.
Abstract:
The LNE-LNHB has recently developed a coincidence instrumentation to take advantage of the latest developments in fast digital acquisition. The performances of the new setup have been tested using two LaBr3 scintillation detectors to investigate gamma-gamma angular correlation in 60Co decay. For that purpose, a specific goniometer based on a simple design was developed. The data collection using a list-mode data acquisition with a CAEN DT5730 digitizer was carried out over a period of three months using an 800-kBq 60Co source. The counting analysis was performed taking advantage of the fast decay properties, and good energy resolution, of the two LaBr3 detectors allowing a very strict selection of the coincident gamma events. From this study, the parameters of 60Ni angular correlation were determined to be equal to a2 = 0.1030(31) and a4 = 0.0097(36), respectively. These results are consistent with previously published values. The accuracy obtained is compared to various recent studies and to a reference cryogenic measurement. Prospects for improvement of the experimental setup are discussed.
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