Simulation of a NE213 γ-response function using an improved multi-parameter minimization procedure

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• 作者：O. Litaize
• 关键词：NE213 ; γ ; -response function ; MINUIT2 ; Monte-Carlo ; MCNPX
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2007
• 出版时间：21 September 2007
• 年：2007
• 卷：580
• 期：1
• 页码：98-101
• 全文大小：446 K

文摘

The γ-response functions of a 15 cm diameter×6 cm thick NE213 detector were recently measured with standard ²²Na, ⁶⁰Co and ²⁴¹Am γ-sources in order to calibrate the scintillation counter and were simulated in the present work with the MCNPX2.5e Monte-Carlo code. The MINUIT2 package, developed at C.E.R.N., was used to minimize the χ² between measured and calculated pulse height distributions in order to derive the experimental resolution parameters. A C++ code was written to simulate various resolution broadening and background shapes. The results are in good agreement with the experimental response function except in the low-energy range (below 100 keV) which could be improved by a better description of the detector environment.