High-precision efficiency calibration of a high-purity co-axial germanium detector
Blank, B. · Souin, J. · Ascher, P. · Audirac, L. · Canchel, G. · Gerbaux, M. · Grevy, S. · Giovinazzo, J. · Guerin, H. · Nieto, T. Kurtukian · Matea, I. · Bouzomita, H. · Delahaye, P. · Grinyer, G. F. · Thomas, J. C.
Original · EN
A high-purity co-axial germanium detector has been calibrated in efficiency to a precision of about 0.15% over a wide energy range. High-precision scans of the detector crystal and gamma-ray source measurements have been compared to Monte-Carlo simulations to adjust the dimensions of a detector model. For this purpose, standard calibration sources and short-lived on-line sources have been used. The resulting efficiency calibration reaches the precision needed e.g. for branching ratio measurements of super-allowed beta decays for tests of the weak-interaction standard model.
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