A new model to account for track overlap in CR-39 data

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• 作者：A.B. Zylstra^a ; ^{zylstra@mit.edu} ; ^{azylstra@psfc.mit.edu} ; J.A. Frenje^a ; F.H. Sé ; guin^a ; M. Gatu Johnson^a ; D.T. Casey^a ; M.J. Rosenberg^a ; C. Waugh^a ; N. Sinenian^a ; M.J.-E. Manuel^a ; C.K. Li^a ; R.D. Petrasso^a ; Y. Kim^b ; H.W. Herrmann^b
• 关键词：CR-39 ; Nuclear track detectors ; Inertial confinement fusion
• 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
• 出版年：2012
• 期刊代码：41_01689002
• 类别：ph
• 出版时间：21 July, 2012
• 卷：681
• 期：Complete
• 页码：84-90
• 文件大小：933 K

摘要

The solid-state nuclear track detector CR-39 is widely used as a detecting mechanism in physics experiments as well as for industrial purposes such as neutron dosimetry and radon detection. The upper limit of detectable charged-particle fluence on CR-39 is set by physical overlapping or 鈥榩ulse pileup鈥?of particle tracks on the surface. In the low-overlap regime the overlapping fraction of tracks scales as where is the density of tracks and is the average track diameter. We report on the development of a Monte Carlo simulation to predict the severity of track overlap for any fluence of an arbitrary diameter distribution of tracks. Furthermore, we present an algorithm to correct for particle-track overlap in a post hoc manner based on these Monte Carlo simulations, which can extend the upper fluence limit for a quasi-monoenergic source by a factor of 3-4 when counting accuracies are acceptable.