Improvement and calibration of a SSNT personal dosemeter and study of importance of albedo factor for dose calculation.
The Neutriran albedo neutron dosemeter has been improved and calibrated for neutron personal dosimetry. The Monte Carlo code MCNP4b was used to calculate the thermal neutrons backscattered from the body (albedo factor). Backscattering from the wall, ceiling and floor in calibration room was considered also via simulation by MCNP4C. A semi automated counting system applying a high-resolution scanner was used for counting of tracks. An 241Am source was used to produce similar alpha particles from 10B (n,alpha)7Li reaction for the optimisation of scanner parameters to distinguish and separate the tracks in SSNTD, which lead to a better distinction between etched alpha tracks and, consequently, a higher linear region of dose characteristic.
Torkzadeh
F
F
Atom Energy Organisation of Iran, Department Radiation Protection Division: Dosimetry, Avenue North Kargar, P.O. Box 14155-4494, Tehran, Iran. ftorkzadeh@aeoi.org.ir
Taheri
M
M
D000465:Algorithms; D002138:Calibration; D004781:Environmental Exposure / Q000032:analysis*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007492:Iran; D009502:Neutrons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000592:standards; D011835:Radiation Protection / Q000295:instrumentation* / Q000592:standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity