High-precision efficiency calibration of a high-purity co-axial germanium detector

B. Blank; J. Souin; P. Ascher; L. Audirac; G. Canchel; M. Gerbaux; S. Grevy; J. Giovinazzo; H. Guerin; T. Kurtukian Nieto; I. Matea; H. Bouzomita; P. Delahaye; G. F. Grinyer; J. C. Thomas

doi:10.1016/j.nima.2014.12.071

arXiv · 1404.1246

High-precision efficiency calibration of a high-purity co-axial germanium detector

B. Blank·J. Souin·P. Ascher·L. Audirac·G. Canchel·M. Gerbaux·S. Grevy·J. Giovinazzo·H. Guerin·T. Kurtukian Nieto·I. Matea·H. Bouzomita·P. Delahaye·G. F. Grinyer·J. C. Thomas

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Abstract

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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B. Blank, J. Souin, P. Ascher, L. Audirac, G. Canchel, M. Gerbaux, S. Grevy, J. Giovinazzo, H. Guerin, T. Kurtukian Nieto, I. Matea, H. Bouzomita, P. Delahaye, G. F. Grinyer, J. C. Thomas. 2014-04-04. High-precision efficiency calibration of a high-purity co-axial germanium detector. https://doi.org/10.1016/j.nima.2014.12.071

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