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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(07) [July 2012] >
| Title: | Bremsstrahlung source term determination for 450MeV electrons |
| Authors: | Nayak, M K
Haridas, G
Sahu, T K
Dashora, S
Nandedkar, R V
Sarkar, P K |
| Keywords: | Bremsstrahlung source term
Electron accelerator
450 MeV
CaSO4:Dy
EGSnrc code |
| Issue Date: | Jul-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Bremsstrahlung X-ray
source term at 450 MeV was experimentally determined at booster synchrotron of
Indus-1 facility at Raja Ramanna Centre for Advanced Technology. Electron beam
at 450 MeV extracted from booster synchrotron was allowed to fall on 25 mm lead
target for the generation of the bremsstrahlung X-rays. The dose rate due to
the X-rays in the forward direction was measured in 30 cm ´ 30 cm ´ 30 cm
water phantom using CaSO4:Dy thermoluminescent discs. The water
phantom was placed at 1m from the target. Maximum dose rate obtained was 3.04
Gy/h at a depth of 5 cm in the phantom. The experiment was simulated using
EGSnrc code and the value obtained is 3.10 Gy/h at 5 cm depth. The data is
compared with the source term usually evaluated using the empirical relation
suggested by W P Swanson, which gave
3.90 Gy/h. The experimental value is found to be in excellent agreement with
the simulated dose rate. It is also found to be in good agreement with the
value obtained from Swanson’s empirical relation within ±28%.
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| Page(s): | 494-497 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(07) [July 2012]
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