Bulk etch rate measurements and calibrations of plastic nuclear track detectors

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• 作者：S. Balestra ; M. Cozzi ; G. Giacomelli ; R. Giacomelli ; M. Giorgini ; A. Kumar ; G. M ; rioli ; S. Manzoor ; A.R. Margiotta ; E. Medinaceli ; et al.
• 关键词：Nuclear track detector ; Bulk etch rate ; Relativistic ions ; Nuclear fragmentation
• 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
• 出版年：2007
• 期刊代码：42_0168583x
• 类别：ph
• 出版时间：January 2007
• 卷：254
• 期：2
• 页码：254-258
• 文件大小：409 K

摘要

New calibrations of CR39 and Makrofol nuclear track detectors have been obtained using 158 A GeV Pb⁸²⁺ and In⁴⁹⁺ions; a new method for the bulk etch rate determination, using both cone height and base diameter measurements, was developed. The CR39 charge resolution based on the etch-pit base area measurements is adequate to identify nuclear fragments in the interval 7 Z/β 49. For CR39 the detection threshold is at REL 50 MeV cm² g⁻¹, corresponding to a nuclear fragment with Z/β 7. Base cone area distributions for Makrofol foils exposed to Pb⁸²⁺ ions have shown for the first time all peaks due to nuclear fragments with Z > 50; the distribution of the etched cone heights shows well separated individual peaks for Z/β 78 to 83 (charge pick-up). The Makrofol detection threshold is at REL 2700 MeV cm² g⁻¹, corresponding to a nuclear fragment with Z/β = 50.