A compact system for measurement of radiophotoluminescence of phosphate glass dosimeter

Ihara, Yohei; Kishi, Atsuya; Kada, Wataru; Sato, F.; Kato, Yushi; Yamamoto, Tatsuya; Iida, Toshiyuki

doi:10.1016/j.radmeas.2007.11.045

Cited by 16 publications

(7 citation statements)

References 3 publications

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“…7, the decay time of the pulse signal for the X-ray irradiated dosimeter is much longer than that for the non-irradiated dosimeter. It is clear from previous papers 8,9,10) The thickness of the X-ray absorption glass filter was replaced by the depth of the glass dosimeter because the glass filter had almost the same photon attenuation coefficient as the glass dosimeter. As described in the chapter 3, the measured results on the energy spectrum (Fig.6) of the X-ray field were used for the dose calculations.…”

Section: Calculationmentioning

confidence: 99%

Response of a Radiophotoluminescence Glass Dosimeter to Low Energy X-rays Necessary for Mammography

Maki

Kobayashi

Hisakado

et al. 2009

Radiat. Safety. Manag.

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New-type radiophotoluminescence (RPL) glass dosimeters, which had thin sensitive layers near their surface, were made for the examination of their response to low energy (15-25 keV) X-rays necessary for mammography. We constructed a laser scanning microscope system for the effective measurement of RPL photons from an X-ray irradiated glass dosimeter. The X-ray sensitive region of the new-type glass dosimeter was near its surface, and moreover a thin X-ray absorption glass filter, whose photon attenuation coefficient was almost the same as the glass dosimeter, was put on the new-type glass dosimeter. These new-type glass dosimeters were irradiated with low energy X-rays and measured results of absorbed dose around their surface layers agreed on the whole with results from photon transport calculations. It was confirmed that RPL glass dosimeters could make a reliable service to the low energy X-ray dosimetry for mammography.

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Section: Calculationmentioning

confidence: 99%

Response of a Radiophotoluminescence Glass Dosimeter to Low Energy X-rays Necessary for Mammography

Maki

Kobayashi

Hisakado

et al. 2009

Radiat. Safety. Manag.

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“…Furthermore, the influence of glass composition on the sensitivity to ionising radiation and the RPL 'build-up' kinetics (i.e., the RPL centre concentration increases as a function of time after irradiation) have been also studied [6]. At the same time, a readout system for the detection of RPL from a glass dosimeter has been developed using a pulsed ultraviolet (UV) nitrogen laser [7] and a UV light emitting diode (LED) [8] as an excitation source. Although the study of the RPL 'build-up' kinetics and development of the readout system address the most important problems for practical applications of radiophotoluminescent glass dosimeters, successful work has not yet been achieved.…”

Section: Introductionmentioning

confidence: 99%

Assignments and optical properties of X-ray-induced colour centres in blue and orange radiophotoluminescent silver-activated glasses

Zheng

Kurobori

2011

Journal of Luminescence

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We have systematically investigated the origin and optical properties of the X-ray-induced colour centres based on the blue and red radiophotoluminescence (RPL) in a silver-activated phosphate glass. The induced-absorption band was decomposed into six Gaussian bands on the basis of its strong analogy with silver-activated sodium chloride. We have ascribed these bands to Ag 0 , Ag 2+ , Ag 2 + and other silver ion species by means of optical and thermal measurements such as colour centre formation and dissolusion by highly successive femtosecond-pulse irradiation, excited-state lifetime and thermal annealing characteristics.The data confirmed that the blue RPL at 450 nm could be attributed to the 270 and 345 nm bands due to the Ag 2 + and Ag 0 centres, respectively, and that the orange RPL at 560 nm was associated with the 308 nm band due to the Ag 2+ centres.

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“…In addition, the integrated value Q for the long-term component was evaluated by interpolating the decay curve of the long-term component over 40 μs. In our previous research (Ihara et al, 2008;Maki et al, 2011), the integrated value P-Q was found to be precisely proportional to the radiation dose. This process is reasonably effective for improving the signal-to-noise ratio at a low dose level.…”

Section: Methodsmentioning

confidence: 79%

Radiophotoluminescence light scope for high-dose dosimetry

Sato

Zushi

Sakiyama

et al. 2015

Radiation Measurements

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A radiophotoluminescence (RPL) light scope is a remote-sensing technique for measuring in situ the radiation dose in an RPL detector placed at a distance. The RPL light scope is mainly composed of an ultraviolet (UV) pulse laser, telescopic lenses, a photomultiplier tube, and camera modules. In a performance test, some RPL detectors were placed at distances up to 30 m and were illuminated with a pulsed UV laser beam. The photoluminescence responses of the RPL detectors were analyzed using this scope. Their radiation doses were determined from the amplitude of the given component of the photoluminescence responses. The RPL readout could be repeated without fading, and its amplitude exhibited good linearity at a dose ranging from 0.1 to 60 Gy. Furthermore, a two-dimensional distribution of radiation dose was obtained by laser scanning on an RPL detector. It was confirmed that the RPL light scope was a useful remote-sensing tool for high-dose dosimetry.

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A compact system for measurement of radiophotoluminescence of phosphate glass dosimeter

Cited by 16 publications

References 3 publications

Response of a Radiophotoluminescence Glass Dosimeter to Low Energy X-rays Necessary for Mammography

Response of a Radiophotoluminescence Glass Dosimeter to Low Energy X-rays Necessary for Mammography

Assignments and optical properties of X-ray-induced colour centres in blue and orange radiophotoluminescent silver-activated glasses

Radiophotoluminescence light scope for high-dose dosimetry

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