Journal: Radiation Measurements

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Publisher

Elsevier

Journal Volumes

ISSN

1879-0925
1350-4487

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2015 - 201952020 - 20232
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Publications 1 - 7 of 7
  • Calibration of intensity spectra from fluorescent nuclear track detectors in clinical ion beams
    Item type: Journal Article
    Verkhovtsev, Alexey; Zimmer, Lucas; Greilich, Steffen (2019)
    Radiation Measurements
  • Violet stimulated luminescence: geo- or thermochronometer?
    Item type: Journal Article
    Ankjærgaard, Christina; Guralnik, Benny; Porat, Naomi; et al. (2015)
    Radiation Measurements
  • Luminescence characteristics of quartz from Hsuehshan Range (Central Taiwan) and implications for thermochronometry
    Item type: Conference Paper
    Wu, Tzushuan; Jain, Mayank; Guralnik, Benny; et al. (2015)
    Radiation Measurements
  • Testing the S/Sᵣ procedure using TLDs and OSLDs and a lexsyg smart automated reader for precise dosimetry
    Item type: Journal Article
    Motta, S.; Christensen, J.B.; Yukihara, E.G. (2023)
    Radiation Measurements
    This work demonstrates the precision achieved with thermoluminescence (TL) and optically stimulated luminescence (OSL) detectors (TLDs and OSLDs) using a procedure that takes advantage of the capabilities of automated TL/OSL readers (lexsyg smart), for potential applications in medical dosimetry. The procedure makes use of the ⁹⁰Sr/⁹⁰Y beta source present in the reader to correct for sample-to-sample sensitivity variations. Typical data obtained using four types of TLDs (LiF:Mg,Ti, LiF:Mg,Cu,P, CaF₂:Tm, Al₂O₃:C single crystal) and two types of OSLDs (BeO and Al₂O₃:C film) are presented along with the estimated uncertainties achieved. The results demonstrate that the material-specific optimized procedure enables a precision (standard deviation of the data) better than 3 % in the 0.2 Gy–2 Gy dose range with all the materials, except for the TL signal of Al₂O₃:C single crystal. The highest precision (¡ 1 %) is achieved using the OSL from Al₂O₃:C film over a wide dose range (∼0.2 Gy to 10 Gy).
  • Radiation-induced growth and isothermal decay of infrared-stimulated luminescence from feldspar
    Item type: Conference Paper
    Guralnik, Benny; Li, Bo; Jain, Mayank; et al. (2015)
    Radiation Measurements
  • Kinetics of infrared stimulated luminescence from feldspars
    Item type: Conference Paper
    Jain, Mayank; Sohbati, Reza; Guralnik, Benny; et al. (2015)
    Radiation Measurements
  • Characterization of a Gd-based color CMOS detector for proton dosimetry
    Item type: Journal Article
    Liu, Qi; Rohrer, Benno; Safai, Sairos; et al. (2023)
    Radiation Measurements
    A color scintillation detector for relative dose distribution measurement was developed at PSI. The system consists of a gadolinium-based scintillating screen mounted perpendicularly to the beam axis and coupled with a color CMOS camera in a light-tight box. The camera is equipped with an iris (aperture) controller to remotely adjust the number of photons reaching the image sensor. To improve the measurement accuracy and decrease the image artifacts, we investigated different methods for spatial calibration and optimized the internal light reflection by adjusting the detector structure. The response dependence on camera working distance, iris setting, and color channels was assessed. The depth-dose curves of the gadolinium-based scintillator in three RGB channels were compared with reference curves measured by an Advanced Markus plane-parallel ion chamber. The quenching effect of the [Formula presented] screen measured with this system amounts to about 10% in the Bragg peak region of a 150 MeV proton beams. The shape of the emission spectrum was observed to be independent of the ionization density. Preliminary investigations showed that it is possible to correlate the ratio of the detector response in different color channels with the proton ionization density.
Publications 1 - 7 of 7