title: A method based on Monte Carlo simulation for the determination of the G(E) function.
abstract: The G(E) function method is a spectrometric method for the exposure dose estimation; this paper describes a method based on Monte Carlo method to determine the G(E) function of a 4″ × 4″ × 16″ NaI(Tl) detector. Simulated spectrums of various monoenergetic gamma rays in the region of 40 -3200 keV and the corresponding deposited energy in an air ball in the energy region of full-energy peak were obtained using Monte Carlo N-particle Transport Code. Absorbed dose rate in air was obtained according to the deposited energy and divided by counts of corresponding full-energy peak to get the G(E) function value at energy E in spectra. Curve-fitting software 1st0pt was used to determine coefficients of the G(E) function. Experimental results show that the calculated dose rates using the G(E) function determined by the authors' method are accordant well with those values obtained by ionisation chamber, with a maximum deviation of 6.31 %.
authors.affiliation: Institute of Nuclear Science and Technology. SiChuan University, Chengdu 610051, China Northwest Institute of Nuclear Technology, Xi'an 710024, China chwei2601@163.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Tiancheng
authors.initials: T
authors.lastname: Feng
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Chuanying
authors.initials: C
authors.lastname: Su
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Tian
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015233:Models, Statistical; D009010:Monte Carlo Method; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013051:Spectrometry, Gamma / Q000295:instrumentation* / Q000379:methods*