Bulk Etch Rate Measurements and Calibrations of Plastic Nuclear Track Detectors

Details Bulk Etch Rate Measurements and Calibrations of Plastic Nuclear Track Detectors Bulk Etch Rate Measurements and Calibrations of Plastic Nuclear Track Detectors

2006-10-25

arxiv.org/abs/physics/0610227v1

Nucl.Instrum.Meth.B254:254-258,2007

Physics

Instrumentation and Detectors

11 pages, 5 EPS figures. Submitted to Nucl. Instr. Meth. B

Scientific paper

10.1016/j.nimb.2006.11.056

New calibrations of CR39 and Makrofol nuclear track detectors have been obtained using 158 A GeV Pb (82+) and In (49+) 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 measurement is adequate to identify nuclear fragments in the interval 7 <= Z/beta <= 49. For CR39 the detection threshold is at REL~50 MeV cm^2/g, corresponding to a nuclear fragment with Z/beta~7. Base cone area distributions for Makrofol foils exposed to Pb (82+) 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/beta = 78 - 83 (charge pickup). The Makrofol detection threshold is at REL 2700 MeV cm^2/g, corresponding to a nuclear fragment with Z/beta~50.

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