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.

Bulk etch rate measurements and calibrations of plastic nuclear track detectors

COZZI, MICHELA;GIACOMELLI, GIORGIO MARIA;GIACOMELLI, ROBERTO;GIORGINI, MIRIAM;KUMAR, AMIT;MARGIOTTA, ANNARITA;MEDINACELI VILLEGAS, EDUARDO;PATRIZII, LAURA;POPA, VLAD;SIRRI, GABRIELE;SPURIO, MAURIZIO;
2007

Abstract

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.
S. Balestra; M. Cozzi; G. Giacomelli; R. Giacomelli; M. Giorgini; A. Kumar; G. Mandrioli; S. Manzoor; A.R. Margiotta; E. Medinaceli; L. Patrizii; V. Popa; I.E. Qureshi; M.A. Rana; G. Sirri; M. Spurio; V. Togo; C. Valieri
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/130504
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