[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 9, Issue 2 (9-2011) ::
Int J Radiat Res 2011, 9(2): 95-102 Back to browse issues page
Experimental and Monte Carlo studies on the response of CR-39 detectors to Am-Be neutron spectrum
M.R. Deevband, P. Abdolmaleki , M.R. Kardan, H.R. Khosravi, M. Taheri, F. Nazeri, N. Ahmadi
, parviz@modares.ac.ir
Abstract:   (10034 Views)
Background: The Poly-Allyl Diglycol Carbonate (PADC) detector is of particular interest for development of a fast neutron dosimeter. Fast neutrons interact with the constituents of the CR-39 detector and produce H, C and O recoils, as well as (n, α) reaction. These neutron- induced charged particles contribute towards the response of CR-39 detectors. Material and Methods: Electrochemical etching was used to enlarge track diameter which was made by low energy recoil protons. Before electrochemical etching, a chemical etching was performed for 1 hour. The responses were also calculated by Monte Carlo simulations, using MCNPX code in different energy bins considering H, C and O recoils. The total registered efficiency and partial contributions of the efficiency, due to interactions with each constituent of CR-39, were calculated. Results: The optimized condition of etchant was obtained to be 6N KOH 15kV.cm-1, and 6 hours etching time. The obtained results show that track efficiency of CR-39 was a function of incident neutron energy. The tracks caused by O and C recoil nuclei were negligible for neutron energies lower than 1 MeV. At neutron energies lower than 1 MeV, only recoil protons would have sufficient energy to leave visible tracks. But, O and C recoils had important contributions in overall response of PADC at neutron energies of few MeV. Conclusion: The efficiency of a CR-39 based dosemeter could be calculated by MCNPX code and the results were in a good agreement with experimental results in energy range of 241Am – Be bare source and 241Am-Be was softened with a spherical polyethylene moderator of radius of 20 cm. Iran. J. Radiat. Res., 2011 9(2): 95-102
Keywords: Neutron dosemetry, electrochemical etching, MCNPX, simulation
Full-Text [PDF 493 kb]   (3302 Downloads)    
Type of Study: Original Research | Subject: Radiation Biology
Send email to the article author

Add your comments about this article
Your username or Email:


XML     Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Deevband M, Abdolmaleki P, Kardan M, Khosravi H, Taheri M, Nazeri F et al . Experimental and Monte Carlo studies on the response of CR-39 detectors to Am-Be neutron spectrum. Int J Radiat Res. 2011; 9 (2) :95-102
URL: http://ijrr.com/article-1-741-en.html

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 9, Issue 2 (9-2011) Back to browse issues page
International Journal of Radiation Research
Persian site map - English site map - Created in 0.05 seconds with 32 queries by YEKTAWEB 4331