An innovative idea for developing a new gamma-ray dosimetry system based on optical colorimetry techniques

다국어 초록 (Multilingual Abstract)

Obtaining knowledge of the absorbed dose up-taken by a certain material when it is exposed to a specificionizing radiation field is a very important task. Even though there are a plenitude of methods fordetermining the absorbed dose, each one has its own strong points and also drawbacks. In this article, aninnovative idea for the development of a new gamma-ray dosimetry system is proposed. The methoddescribed in this article is based on optical colorimetry techniques. A color standard is fixed to the back ofa BK-7 glass plate and then placed in a point in space where the absorbed dose needs to be determined.
Gamma-rayeinduced defects (color centers) in the glass plate start occurring, leading to a degree ofsaturation of the standard color, which is proportional, on a certain interval, to the absorbed dose. Afterthe exposure, a high-quality digital image of the sample is taken, which is then processed (MATLAB), andits equivalent IRGB intensity value is determined. After a prior corroboration between various well-knownabsorbed dose values and their corresponding IRGB values, a calibration function is obtained. By using thiscalibration function, an "unknown" up-taken dose value can be determined

참고문헌 (Reference)

1 I. Ursu, "The radiopharmaceuticals research center (ccr) of ifin-hh at start" 58 : 1327-1336, 2013

2 Schott Advanced Optics, "TIE-42: radiation Resistant optical glasses"

3 M.-R. Ioan, "Study of the optical materials degradation caused by gamma radiation and the Recovery process by controlled heat treatment" 61 : 892-902, 2016

4 A.R. Smith, "Radiation events in astronomical {CCD} images" 4669 : 172-183, 2002

5 E. Mazy, "Optical design of the optical monitoring camera (OMC) of INTEGRAL" 411 : L269-L273, 2003

6 N.V. Zamfir, "Nuclear physics with 10 PW laser beams at extreme light infrastructure - nuclear physics (ELI-NP)" 223 : 1221-1227, 2014

7 M.-R. Ioan, "LIDT test coupled with gamma radiation degraded optics" 369 : 94-99, 2016

8 I. Spiridonov, "Investigation of colour inconstancy and colour gamut changes of printed images depending on the standard illuminants" 42 : 627-641, 2012

9 M.-R. Ioan, "Investigation of RGB spectral components in the images captured through gamma rays affected optical focusing lens" 61 : 1198-1206, 2016

10 L.F. Santos, "Influence of Ionizing Radiation on Optical Glasses for Space Applications" Ann. Opt. 2006

11 N.V. Zamfir, "Extreme light infrastructure - nuclear physics (ELI-NP) European Research centre" 66 : 11043-, 2014

12 S. Baccaro, "Effect of ${\gamma}$ irradiation on optical components" 52 : 1779-1784, 2005

13 S. Tominaga, "Colour temperature estimation of scene illumination by the sensor correlation method" 95-108, 2007

14 M.-R. Ioan, "Analyzing of the radiation induced damage to optical glasses by using online heating laser measurements" 61 : 614-625, 2016

15 M.-R. Ioan, "Amorphous and crystalline optical materials used as instruments for high gamma radiation doses estimations" 377 : 43-49, 2016

16 M.-R. Ioan, "A novel method involving Matlab coding to determine the distribution of a collimated ionizing radiation beam" 11 : P08005-P08005, 2016