Evaluation of scattered radiation in a calibration range using exposure rate energy spectra.

Abstract:

:ISO standard 4037 specifies that for calibrating protection level dosimeters, scattered radiation should contribute less than 5% of the exposure. In previous work, the authors reported the results of an MCNP analysis of the shadow shield technique that was performed for a calibration range with a Cs irradiator. This paper examines the energy distribution of the photons contributing to the exposure percent scatter (S%) and the detailed origin of the scatter that originates in the irradiator. In summary, it reports that: 1) the majority of S% is due to photons with energies that are significantly below the source energy, 2) a significant percentage of S% is due to photons that scatter within the source and source capsule walls, and 3) S% due to scatter within the irradiator is even more significant than previously reported.

journal_name

Health Phys

journal_title

Health physics

authors

Petrie CM,Blue TE,Herminghuysen K

doi

10.1097/HP.0b013e3182259a98

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

71-80

issue

1

eissn

0017-9078

issn

1538-5159

pii

00004032-201201000-00008

journal_volume

102

pub_type

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