Application of CdZnTe Quasi-Hemispherical Detectors in Strong Gamma-Radiation Fields

The results of a study of some ways to improve spectroscopy characteristics of the CdZnTe quasi-hemispherical detectors when working in high gamma radiation fluxes are presented. It was shown that the use of IR illumination with a wavelength of 1050 nm or 1200 nm or at slight warm-up of the detector to +30°C … +40°C can significantly improve spectroscopy performance of the CdZnTe detectors of size 3.5 mm × 3.5 mm × 1.75 mm when operating in a tested gamma-radiation field with a dose rate up to 590 mGy/h.

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Statistical and sensitivity analysis of stepper motor parameters used in high gamma radiation field

10.1109/ecai52376.2021.9515038 ◽

2021 ◽

Author(s):

Mihai-Catalin Arva ◽

Dorin n Mirel Stanica ◽

Nicu Bizon ◽

Cosmin Ivan

Keyword(s):

Sensitivity Analysis ◽

Gamma Radiation ◽

Radiation Field ◽

Stepper Motor ◽

High Gamma

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Investigation on the chemical behaviour of a crown ether irradiated in high gamma radiation fields

Radiochimica Acta ◽

10.1524/ract.2005.93.9-10.601 ◽

2005 ◽

Vol 93 (9-10) ◽

Cited By ~ 3

Author(s):

María C. Fornaciari Iljadica ◽

J. C. Furnari ◽

Isaac M. Cohen

Keyword(s):

Crown Ether ◽

Gamma Radiation ◽

Radiation Doses ◽

Radiation Fields ◽

High Gamma ◽

Chemical Behaviour

SummaryThe performance, after irradiation at high gamma radiation doses, of the material known under the commercial name SrResin (Eichrom Industries, USA), consisting of a crown ether, 4,4

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Influence of high .gamma. radiation fields on response of ion-selective electrodes

Analytical Chemistry ◽

10.1021/ac00277a024 ◽

1984 ◽

Vol 56 (13) ◽

pp. 2367-2368 ◽

Cited By ~ 3

Author(s):

Janis. Gulens ◽

Steven J. West ◽

James W. Ross

Keyword(s):

Gamma Radiation ◽

Ion Selective Electrodes ◽

Radiation Fields ◽

High Gamma

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Operation of {sup 3}He Proportional Chambers in High Gamma Radiation Fields

10.2172/15042 ◽

1999 ◽

Author(s):

N.W. Hill ◽

V.C. Miller ◽

T.E. Valentine ◽

J.A. Williams

Keyword(s):

Gamma Radiation ◽

Radiation Fields ◽

High Gamma

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Calculation of the Effective Energy Release Centerʼs Position of Inorganic Scintillation Detectors for Calibration at Small “Source–Detector” Distances

Devices and Methods of Measurements ◽

10.21122/2220-9506-2021-12-3-239-248 ◽

2021 ◽

Vol 12 (3) ◽

pp. 239-248

Author(s):

R. V. Lukashevich ◽

G. A. Fokov

Keyword(s):

Gamma Radiation ◽

Dose Rate ◽

Energy Release ◽

Radiation Field ◽

Scintillation Detector ◽

Radiation Source ◽

Radiation Flux ◽

Scintillation Detectors ◽

Effective Energy ◽

Radiation Sources

Inorganic scintillation detectors are widely used to measure of dose rate in the environment due to their high sensitivity to photon radiation. A distinctive feature when using such detectors is the need to take into account of the position of the effective energy release center. This peculiarity is actual when using measuring instruments with inorganic scintillation detectors as working standards during calibration at short “source–detector” distances in conditions of low-background shield or using a facility with protection from external gamma radiation background in the dose rate range from 0.03 to 0.3 μSv/h (μGy/h). The purpose of this work was to calculate the position of the effective energy release center of NaI(Tl) scintillation detectors and to take it into account when working at short “source–detector” distances.An original method of determining the position of the effective energy release center when irradiating the side and end surfaces of inorganic scintillation detector with parallel gamma radiation flux and point gamma radiation sources at small “source–detector” distances using Monte Carlo methods is proposed. The results of calculations of the position of the effective energy release center of NaI(Tl) based detectors of “popular” sizes for the cases of parallel gamma radiation flux and point sources of gamma radiation at small “source–detector” distances are presented. The functional dependences of the position of the effective energy release center of NaI(Tl) based detectors on the distance to the point gamma radiation sources and the energy of gamma radiation sources are presented.As a result of the study it was found that for scintillation NaI(Tl) detectors of medium size (for example, Ø25×40 mm or Ø40×40 mm) the point gamma radiation source located at a distance of 1 m or more, creates a radiation field which does not differ in characteristics from the radiation field created by a parallel flux of gamma radiation. It is shown that approaching the point gamma radiation source to the surface of scintillation detector leads to displacement of the position of the effective energy release center to the surface of the detector.

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