International Journal of Physics
ISSN (Print): 2333-4568 ISSN (Online): 2333-4576 Website: Editor-in-chief: B.D. Indu
Open Access
Journal Browser
International Journal of Physics. 2016, 4(1), 1-4
DOI: 10.12691/ijp-4-1-1
Open AccessArticle

Laser Effect on the Activation Energies, Bulk Etch Rate and Track Etch Rate of CR-39 Polymeric Detector

Ahmed A. Ibrahim1, and Sozan Bhaa-al-deen1

1Department Physics, College of Science, Kirkuk University, Kirkuk, Iraq

Pub. Date: January 07, 2016

Cite this paper:
Ahmed A. Ibrahim and Sozan Bhaa-al-deen. Laser Effect on the Activation Energies, Bulk Etch Rate and Track Etch Rate of CR-39 Polymeric Detector. International Journal of Physics. 2016; 4(1):1-4. doi: 10.12691/ijp-4-1-1


The aim of this paper is to find the effect of Nd: YAG laser of wavelength (532 nm), laser power 150 MW on the CR-39 polymer. Twenty three detectors were divided in to three sets. The first set (ten detectors) (post-exposed) was first exposed to alpha radiation from 241Am source at 3MeV and then treated in air with laser at different exposure time started from 10 minutes to 100 minutes with ten minutes differ between them (alpha + laser). For the second set (ten detectors) (pre-exposed), the process was reversed (laser +alpha) under the same conditions, for the last set (three detectors) (un-exposed to laser), used as a control set, was irradiated with an alpha source (241Am). Alpha track diameters, bulk etching velocity (VB), track etching velocity (VT), etching efficiency (η), etching ratio (V) were determined. The activation energies of bulk etch (EB) and track etch (ET) for unexposed, post- exposed and pre-exposed are found to be equal to 1.10, 0.92, 0.82 eV and 1.07, 0.86, 0.79 eV respectively.

nuclear track detectors CR-39 activation energy of bulk etch (EB) and track etch (ET) etching conditions

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit


[1]  Fleischer R.L, Price R.B and Walker R.M, Nuclear Tracks in Solids: Principles and Applications, University of California Press, Berkeley, USA, 1975.
[2]  Saffarini G., NidalD waikat, Mousa El-Hasan, Fuminobu Sato, Yushi Kato and Toshiyu kiIida “The effect of infrared laser on the activation energy of CR-39 polymeric detector” Nuclear Instruments and Methods in Physics Research” (A 680), 82-85, 2012.
[3]  Durrani S.M.A and. Abu-Jarad F., “The heat effect on CR-39 nuclear track detectors irradiated by a pulsed IR laser” Nuclear Instruments and Methods 100 (1), 97-102, 1995.
[4]  Babak Jaleh, Parviz Parvin, Kavoos Mirabaszadeh, and Mehran Katouz, KrF laser irradiation effects on nuclear track recording properties of polycarbonate,” Radiation Measurements, 38,(2), 137-254, April, 2004.
[5]  Benton E.V, and HenkeR.P, Charged particle tracks in polymers no. 7: sensitivity enhancement of lexan. Naval Radiological Defense Lab.(NRDL), San Francisco, CA, Report Number(s):AD-682922; USNRDL-TR(1968) 68-136.
[6]  Awad E.M and EL-Samman H.M, Activation energy of etching for CR-39 as a function of linear energy transfer of the incident ions. Radiation Measurements” 31, 109-114, 1999.
[7]  Virk H.K, Modgil S.K and Bhatia R.K, Activa -tion energy for the annealing of radiation damage in CR-39: An intrinsic property of the detector,” Nuclear Tracks and Radiation Measurements”, 11(6) 323 -325, 1986.
[8]  Surinder S. and Neerja. The effect of gamma-irradiation on the activation energy of bulk and track etching in CR-39 plastic track detector “Radiation Measurements “, 42, 1507-1507, 2007.
[9]  Khayrat A. H.and ; Durrani, S.A., variation of alpha-particle track diameter in CR-39 as a function of residual energy and etching “Radiation measurements”, 30, 15-18, 2012.
[10]  G.Saffarini, D. Nidal, M.El-Hassan. Kato and T.Lida, Discovery new solution etchant, “Nucl.Instr.and math in phy. Research'“, A. 680., 82-85, 2012.