Abstract:
:Lead attenuation characteristic curves are often consulted in premises radiation shielding assessments employing the non-destructive testing (NDT) method. This study developed lead attenuation characteristics mathematical models for the radionuclide Co-57. These models take into account the statistical variation of the attenuation characteristics. The results are a set of equations that a NDT assessor can use to predict the range of transmission factors for the NDT measurement or, using the inverse functions, to gauge the lead equivalence (with the associated uncertainty) of a radiation barrier. This study showed that the combined effect of types of statistical variations can form an uncertainty region on the transmission characteristics such that the relative uncertainty decreases for values of lead mass per unit area up to approximately 20 kg/m2 and 15 kg/m2 for the Ludlum 18 and Ludlum 2241-2 survey meters respectively but thereafter increases.
journal_name
Australas Phys Eng Sci Medjournal_title
Australasian physical & engineering sciences in medicineauthors
Lee KL,Schick Ddoi
10.1007/BF03179241subject
Has Abstractpub_date
2009-12-01 00:00:00pages
212-9issue
4eissn
0158-9938issn
1879-5447journal_volume
32pub_type
杂志文章abstract::The reference air kerma rate from 192Ir High Dose Rate (HDR) brachytherapy sources can be measured using a suitably calibrated Farmer chamber and an appropriate in-air calibration jig. When a primary standard for 192Ir gamma rays is available, a calibration coefficient for the chamber and jig combination can be determ...
journal_title:Australasian physical & engineering sciences in medicine
pub_type: 杂志文章
doi:10.1007/BF03178603
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journal_title:Australasian physical & engineering sciences in medicine
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journal_title:Australasian physical & engineering sciences in medicine
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journal_title:Australasian physical & engineering sciences in medicine
pub_type: 杂志文章
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更新日期:1996-12-01 00:00:00
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journal_title:Australasian physical & engineering sciences in medicine
pub_type: 杂志文章
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journal_title:Australasian physical & engineering sciences in medicine
pub_type: 杂志文章
doi:
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journal_title:Australasian physical & engineering sciences in medicine
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journal_title:Australasian physical & engineering sciences in medicine
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journal_title:Australasian physical & engineering sciences in medicine
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