Temperature Dependence of NaI(Tl) Radiation Scintillation Detectors’ Characteristics

Csurgai, József; Padányi, József; Földi, L.

doi:10.3849/aimt.01328

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…Persze, manapság már a dinamikus hűtést megvalósító termoelektromos hűtés ki tudja váltani a kriosztátban tárolt folyékony nitrogénnel való statikus hűtést, de számunkra ez sem megoldás, mivel ez még szintén jelentős tömegtöbbletet eredményez, és nagy teljesítményű tápegységet követel. Így hát marad a jó öreg, nagy hatásfokú szcintillációs detektor, amelynek a környezeti mérésekhez csak a hőmérséklet változása okozta spektrumtorzulását kell kompenzálni [15].…”

Section: Szakirodalmi áTtekintésunclassified

Drónra szerelhető radiológiai modul fejlesztési koncepció, hardveres felépítés és nukleáris méréstechnikai alapok

Csurgai¹

2022

RepTudKoz

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Különböző célú és rendeltetésű, merev- vagy forgószárnyú drónokra kialakított szenzoros felépítmények széles skálája valósult már meg, vagy áll megvalósítás alatt. A szerző egy cikk keretében ízelítőt szeretne nyújtani a jelen TKP2021-NVA-16 pályázat keretében kialakítandó légi sugárfelderítő, drónra szerelhető szenzormodul fejlesztéséről. Jelen cikk röviden áttekinti az alkalmazás műveleti kritériumait, a szenzormodul fejlesztésének előzményeit, a K&F méréstechnikai alapjait, kialakítás alatt álló radioszenzoros és általános rendeltetésű érzékelő rendszerét, a hordozóeszköz lehetséges repülési magasságának és sebességének tervezési alapjait.

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Section: Szakirodalmi áTtekintésunclassified

Drónra szerelhető radiológiai modul fejlesztési koncepció, hardveres felépítés és nukleáris méréstechnikai alapok

Csurgai¹

2022

RepTudKoz

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“…Te second category is to stabilize the spectrum without adjusting the gain. Csurgai et al elaborated on a simple method for energy recalibration of scintillation detectors at diferent temperatures [18], which can be used in software processing. Bu et al adopted some simple ofine methods to correct the drift of a gamma spectrum [19].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Correction Methods of Temperature-Caused Peak Shift for a NaI(Tl) Gamma-Ray Spectrometer

Zhai

Lai

et al. 2023

Journal of Spectroscopy

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NaI(Tl) detectors are frequently operated under unstable temperature conditions when used in an open environment. Temperature changes would result in a peak shift and spectral distortion during measurement. Two easy-to-implement methodologies are proposed to stabilize the measured spectrum without the necessity of adjusting the gain, which are a correction algorithm for temperature-caused peak-shift based on multiple characteristic peak area weighting factors and an interpolation correction algorithm based on multicharacteristic peak sequence. Both of them can be used when the relative channel displacement of characteristic peaks in the spectrum due to temperature changes is not constant. Experimental data obtained under controlled temperature conditions in the laboratory were adopted to correct a spectrum, with joint consideration of some known characteristic peaks, such as 40K, U (214Bi), or Th (208Tl) peaks. Through constructing a reversible temperature coefficient matrix, one can easily obtain the coefficients of the n-th polynomial describing the influence of temperature on peak position, which presents their nonlinear mathematical relationship. Then, corrections of these two effects can also be easily calculated. Comparing the experimental results, peak positions before and after correction, it is proved that the interpolation correction algorithm based on multicharacteristic peak sequence has better correction accuracy, but the temperature-caused peak shift correction algorithm based on the multicharacteristic peak area weighting factor has a shorter calibration time.

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Radioactive source strength effect on gamma radiation monitoring with a NaI (Tl) scintillation detector

et al. 2022

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The accurate monitoring of gamma radiation doses in the environment has become essential due to its effect on human health. In this study, the temperature dependence of NaI (Tl) scintillation detectors based on the daily/annually measured dose rate in the environment as well as the importance of selecting the appropriate radioactive source strength when calibrating NaI (Tl) detectors for gamma radiation monitoring were investigated. The temperature correction coefficients discovered during the calibration of the BDKG-03 detector by Atomtex were verified, and whether the time duration of the measurement interval has an effect on readings of gamma radiation was also investigated in the city of Tomsk. NaI (Tl) scintillation detectors were used to monitor the gamma background radiation in the environment. The detectors were calibrated with both high and low radioactive sources to obtain a temperature correction coefficient in order to stabilize the influence of temperature change on the detector at different time intervals. This was used to study the correlation between the daily and annual dose rates of low gamma background radiation. The results showed that there was a shift in the spectrum of the daily and annual dose rates calculated using the algorithm obtained when the detector was calibrated with a highly radioactive source to the position of the constant coefficient for low-level dose. However, the ones obtained when the detector was calibrated with a low radioactive source and that of the constant coefficient for a low-level dose overlapped each other. This demonstrated that the type of radioactive source used in detector calibration during manufacture has an effect on the temperature correction coefficient, which in turn has an effect on the accuracy of the ambient dose rate when used to monitor gamma radiation. The duration of the time interval for measurement was found to be very important since it has an effect on dose rate readings.

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Temperature Dependence of NaI(Tl) Radiation Scintillation Detectors’ Characteristics

Cited by 5 publications

References 14 publications

Drónra szerelhető radiológiai modul fejlesztési koncepció, hardveres felépítés és nukleáris méréstechnikai alapok

Drónra szerelhető radiológiai modul fejlesztési koncepció, hardveres felépítés és nukleáris méréstechnikai alapok

Nonlinear Correction Methods of Temperature-Caused Peak Shift for a NaI(Tl) Gamma-Ray Spectrometer

Radioactive source strength effect on gamma radiation monitoring with a NaI (Tl) scintillation detector

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