A comparison of TLD and Monte Carlo calculation for beta dosimetry

Conference · Fri Jan 01 04:00:00 EST 1988 · Transactions of the American Nuclear Society; (USA)

OSTI ID:5551961

Hoffman, J M; Ben-Shacher, B; Levine, S H

Beta particle radiation, which always has a low-penetrating component, is strongly absorbed by the skin, i.e., at a depth of 7 mg/cm{sup 2}. The major problem in using thermoluminescent dosimeters (TLDs) for beta dosimetry is that the TLD chips have finite thickness and sometimes their response is nonlinear with beta energy. A new method of determining the beta dose to the skin has been investigated by combining analytic calculations with experimental measurements. The analysis was performed with an experimentally verified Monte Carlo computer program based on electron-transport theory and beta spectrometry. The experimental measurements were made with Li{sub 2}B{sub 4}O{sub 7}:Cu phosphors having different polyethylene shields and an extrapolation chamber. In the present work the authors used the Panasonic UD-806 badges, which contain four Li{sub 2}B{sub 4}O{sub 7}:Cu phosphors, shielded by 2, 49, 160, and 160 of mg/cm{sup 2} of polyethylene. The energy deposited by electrons in Li{sub 2}B{sub 4}O{sub 7}:Cu, shielded by different layers of polyethylene, as a function of the dept, was calculated by using the Monte Carlo electron transport code ZEBRA developed by Berger. Excellent agreement is found between the calculated and measured ratios for any two different shielded phosphors, for both sources, except for the ratios of {sup 204}T1 spectrum when the shield of 77 mg/cm is involved.

• OSTI ID: 5551961
• Report Number(s): CONF-881011--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (USA) Journal Volume: 57
• Country of Publication: United States
• Language: English

Related Subjects

560151 -- Radiation Effects on Animals-- Man
61 RADIATION PROTECTION AND DOSIMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
655003* -- Medical Physics-- Dosimetry
ABSORPTION
ANIMALS
BETA PARTICLES
BODY
CALIBRATION
CHARGED PARTICLES
COMPUTER CODES
DOSEMETERS
DOSES
DOSIMETRY
ENERGY ABSORPTION
LUMINESCENT DOSEMETERS
MAMMALS
MAN
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MOCKUP
MONTE CARLO METHOD
OCCUPATIONAL EXPOSURE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANS
PERFORMANCE
PERSONNEL DOSIMETRY
PHANTOMS
POLYETHYLENES
POLYMERS
POLYOLEFINS
PRIMATES
RADIATION DOSES
RADIATION PROTECTION
SHIELDING
SKIN
STRUCTURAL MODELS
THERMOLUMINESCENT DOSEMETERS
VERTEBRATES
Z CODES