A New Method for Measuring Particle Size Distribution of Radon Decay Products Using Imaging Plate

Fading Characteristics of Alpha Radiation Signals Stored in an Imaging Plate

“…In those studies, the number of peaks (defined as ''alpha spots'' in this study) with the PSL values on it and its neighboring pixels larger than the threshold was counted instead of the gross PSL values to quantify alpha radiation. [6][7][8] For example, the threshold of PSL was determined as 0.1 for BAS-SR2025 type of IP (Fuji Film Co., Ltd.) by Saito et al to measure the airborne radon decay products. 6) However, it is known that the sensitivity of IP depends on the type of IP, its imaging reader, and the parameters selected for image readout.…”

Fading Characteristics of Alpha Radiation Signals Stored in an Imaging Plate

“…6) However, it is known that the sensitivity of IP depends on the type of IP, its imaging reader, and the parameters selected for image readout. Referring to the discrimination method proposed by Saito et al, 6) a new PSL value of 0.25 was recommended as the threshold to discriminate alpha radiation from natural background radiation and system noise for BAS-MS type of IP and BAS-2500 imaging reader system (Fuji Film Co., Ltd.) in our previous study. 9) Furthermore, compared with the traditional method using the PSL values, we also found that the alpha-spot counting method had better linearity and lower detection limit for measurements of alpha radiation, and the fading effect was relatively smaller.…”

“…3) Recently, the applications of IP have been extended to quantitative measurements of both natural and artificial radioactivity. [4][5][6][7][8] As the alpha signals in IP are potentially interfered by the background radiation and system noise, several previous studies have proposed and developed several methods to discriminate the signal of alpha radiation from that of other types of radiation by setting different thresholds of PSL. In those studies, the number of peaks (defined as ''alpha spots'' in this study) with the PSL values on it and its neighboring pixels larger than the threshold was counted instead of the gross PSL values to quantify alpha radiation.…”

“…In those studies, the number of peaks (defined as ''alpha spots'' in this study) with the PSL values on it and its neighboring pixels larger than the threshold was counted instead of the gross PSL values to quantify alpha radiation. [6][7][8] For example, the threshold of PSL was determined as 0.1 for BAS-SR2025 type of IP (Fuji Film Co., Ltd.) by Saito et al to measure the airborne radon decay products. 6) However, it is known that the sensitivity of IP depends on the type of IP, its imaging reader, and the parameters selected for image readout.…”

“…[6][7][8] For example, the threshold of PSL was determined as 0.1 for BAS-SR2025 type of IP (Fuji Film Co., Ltd.) by Saito et al to measure the airborne radon decay products. 6) However, it is known that the sensitivity of IP depends on the type of IP, its imaging reader, and the parameters selected for image readout. Referring to the discrimination method proposed by Saito et al, 6) a new PSL value of 0.25 was recommended as the threshold to discriminate alpha radiation from natural background radiation and system noise for BAS-MS type of IP and BAS-2500 imaging reader system (Fuji Film Co., Ltd.) in our previous study.…”