EFFECT OF COLLIMATOR ELEMENTS ON THE BEAM SPECTRUM AND KERMA IN GAMMA IRRADIATOR

Rasito Tursinah (Center for Science and Applied Nuclear Technology – BATAN, Jl. Tamansari 71 Bandung, Indonesia)
Bunawas Bunawas (Center for Science and Applied Nuclear Technology – BATAN, Jl. Tamansari 71 Bandung, Indonesia)
Tri Cahyo (Center for Science and Applied Nuclear Technology – BATAN, Jl. Tamansari 71 Bandung, Indonesia)
Ade Suherman
P Sukmabuana

Ganendra: Majalah IPTEK Nuklir
Volume 24 Nomor 2 Juli 2021

In the development of low-medium energy photon calibration facilities we have simulated several types of gamma irradiator collimator materials with ISO 4037-1 design connected to the output beam spectrum and the resulting kerma. Four types of collimator material, namely Al, Fe, Pb, and WCu have been simulated with gamma radiation sources 241Am, 57Co, 137Cs, and 60Co. Simulations were carried out using the Monte Carlo method with the PHITS computer program. Based on the comparison of air kerma produced, collimators made from Al are suitable for gamma sources 241Am, Fe material for gamma sources 57Co, and Pb material for sources 137Cs and 60Co.