Response of a BaF₂ scintillation detector to quasi-monoenergetic fast neutrons in the range of 45 to 198MeV

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• 作者：Gunzert-Marx ; K. ; Schardt ; D. ; Simon ; R.S. ; Gutermuth ; F. ; Radon ; T. ; Dangendorf ; V. ; Nolte ; R.
• 关键词：29.40.Mc ; 29.25.Dz ; Bariumfluoride scintillator ; Neutron efficiency ; Quasi-monoenergetic neutron beam ; Monte-Carlo code FLUKA
• 刊名：Nuclear Inst. and Methods in Physics Research, A
• 出版年：2005
• 出版时间：January 1, 2005
• 年：2005
• 卷：536
• 期：1-2
• 页码：146-153
• 全文大小：359 K

文摘

We have studied the neutron response of a scintillation detector consisting of a 14cm long, hexagonal-shaped BaF₂-crystal with an inner diameter of 8.75cm coupled to an EMI9821QB photomultiplier tube. The detector was exposed to calibrated quasi-monoenergetic neutron fields obtained from ⁷Li(p,n)⁷Be reactions. The measurements were performed at neutron energies of 45, 60, 96, 147 and 198MeV as given by the energies of the incident protons. The experimental pulse-height spectra of the BaF₂-detector are compared with Monte Carlo simulations using the FLUKA code. The detection efficiency of the BaF₂-detector in the energy range of 45–198MeV was determined as a function of the discriminator threshold and compared to the literature data. At neutron energies above 100MeV the detection efficiency of the BaF₂-detector was found to be a factor of two higher than that of an NE213-detector of comparable size.