Characterization of a gamma-ray tracking array: A comparison of GRETINA and Gammasphere using a ⁶⁰Co source

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• 作者：T. Lauritsen^a ; ^{torben@anl.gov" class="auth_mail" title="E-mail the corresponding author} ; A. Korichi^b ; S. Zhu^a ; A.N. Wilson^c ; D. Weisshaar^d ; J. Dudouet^e ; A.D. Ayangeakaa^a ; M.P. Carpenter^a ; C.M. Campbell^f ; E. Clé ; ment^h ; H.L. Crawford^f ; M. Cromaz^f ; P. Fallon^f ; J.P. Greene^a ; R.V.F. Janssens^a ; T.L. Khoo^a ; N. Lalović^k ; ⁱ ; I.Y. Lee^f ; A.O Macchiavelli^f ; R.M. Perez-Vidal^g ; S. Pietriⁱ ; D.C. Radford^j ; D. Ralet^b ; L.A. Riley^l ; D. Seweryniak^a ; O. Stezowski^e
• 关键词：Segmented germanium detectors ; Efficiency measurements ; γ-Ray tracking ; Gammasphere ; GRETINA ; GRETA ; γ-Ray spectroscopy ; Nuclear structure
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：11 November 2016
• 年：2016
• 卷：836
• 期：Complete
• 页码：46-56
• 全文大小：1084 K

文摘

In this paper, we provide a formalism for the characterization of tracking arrays with emphasis on the proper corrections required to extract their photopeak efficiencies and peak-to-total ratios. The methods are first applied to Gammasphere, a well characterized 4π array based on the principle of Compton suppression, and subsequently to GRETINA. The tracking efficiencies are then discussed and some guidelines as to what clustering angle to use in the tracking algorithm are presented. It was possible, using GEANT4 simulations, to scale the measured efficiencies up to the expected values for the full 4π implementation of GRETA.