ACTIVITY DETERMINATION OF IR-192 SOLID SOURCES BY IONIZATION-CHAMBER MEASUREMENTS USING CALCULATED CORRECTIONS FOR SELF-ABSORPTION

Authors
BUERMANN L KRAMER HM SCHRADER H SELBACH HJ
Citation
L. Buermann et al., ACTIVITY DETERMINATION OF IR-192 SOLID SOURCES BY IONIZATION-CHAMBER MEASUREMENTS USING CALCULATED CORRECTIONS FOR SELF-ABSORPTION, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 339(1-2), 1994, pp. 369-376
Citations number
22
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
339
Issue
1-2
Year of publication
1994
Pages
369 - 376
Database
ISI
SICI code
0168-9002(1994)339:1-2<369:ADOISS>2.0.ZU;2-P
Abstract
A re-entrant-well ionization chamber calibrated in terms of activity f or standard solution sources and a spherical ionization chamber calibr ated in terms of air kerma rate were used to determine independently t he activity of a typical Ir-192 brachytherapy source. Corrections for absorption and attenuation of photons inside the source and the capsul e were calculated with Monte Carlo methods. The results of both method s agree within 1%. It is concluded that the specification of brachythe rapy sources in terms of activity and reference air kerma rate yield c onsistent results if the real geometry and composition of the source a re taken into account.