Study on dose estimation for low energy photons

Recently, the use of low energy photons from ultraviolet to several tens of keV has been extensively increased in synchrotron radiation and free electron laser facilities, where the beam is almost completely parallel and the intense photon sources several orders higher than that of conventional x-ray machines are available. In this context, the development of dose evaluation for low energy photons has been crucial for radiation protection, medical application such as coronary angiography, and heat stress in optical devices of the beam filters and monochromators. From this point, in this study the validity of a theory used for dose evaluation was examined for low energy photons, dosimeter responses of thermoluminescent dosimeters (TLDs) were measured using monoenergetic photons from synchrotron radiation, and furthermore by applying those results to dose measurements the dose estimation techniques were improved. (J.P.N.)