Estimation of I-131 Concentration Using Time History of Pulse Height Distribution at Monitoring Post and Detector Response for Radionuclide in Plume

A procedure to obtain analytical models for the elemental X-ray pulse-height distribution libraries necessary in the library least-squares analysis of energy-dispersive x-ray fluorescence spectra is outlined. This is accomplished by first obtaining the response function of Si(Li) detectors for incident photons in the energy range of interest. Subsequently this response function is used to generate the desired elemental library standards for use in the least-squares analysis of spectra, or it can be used directly within a least-squares computer program, thus eliminating the large amount of computer storage required for the standards.

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Energy-dependent dead-time correction in digital pulse processors applied to silicon drift detector's X-ray spectra

Journal of Synchrotron Radiation ◽

10.1107/s1600577517018318 ◽

2018 ◽

Vol 25 (2) ◽

pp. 484-495 ◽

Cited By ~ 1

Author(s):

Suelen F. Barros ◽

Vito R. Vanin ◽

Alexandre A. Malafronte ◽

Nora L. Maidana ◽

Marcos N. Martins

Keyword(s):

Dead Time ◽

Pulse Height ◽

Height Distribution ◽

Pulse Height Distribution ◽

Dead Time Correction ◽

Time Model ◽

X Ray ◽

Digital Pulse ◽

Analytical Correction ◽

Energy Dependent

Dead-time effects in X-ray spectra taken with a digital pulse processor and a silicon drift detector were investigated when the number of events at the low-energy end of the spectrum was more than half of the total, at counting rates up to 56 kHz. It was found that dead-time losses in the spectra are energy dependent and an analytical correction for this effect, which takes into account pulse pile-up, is proposed. This and the usual models have been applied to experimental measurements, evaluating the dead-time fraction either from the calculations or using the value given by the detector acquisition system. The energy-dependent dead-time model proposed fits accurately the experimental energy spectra in the range of counting rates explored in this work. A selection chart of the simplest mathematical model able to correct the pulse-height distribution according to counting rate and energy spectrum characteristics is included.

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Determination of the Ion‐Induced Electron Yield from a Statistical Treatment of Pulse‐Height Distribution Curves Measured with an Ion‐Electron‐Scintillation Detector

Journal of Applied Physics ◽

10.1063/1.1661354 ◽

1972 ◽

Vol 43 (4) ◽

pp. 1524-1529 ◽

Cited By ~ 4

Author(s):

H. W. Werner ◽

J. v. d. Berg

Keyword(s):

Scintillation Detector ◽

Statistical Treatment ◽

Pulse Height ◽

Height Distribution ◽

Pulse Height Distribution ◽

Electron Yield

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Air concentration estimation of radionuclides discharged from Fukushima Daiichi Nuclear Power Station using NaI(Tl) detector pulse height distribution measured in Ibaraki Prefecture

Journal of Nuclear Science and Technology ◽

10.1080/00223131.2016.1193453 ◽

2016 ◽

Vol 53 (12) ◽

pp. 1919-1932 ◽

Cited By ~ 14

Author(s):

Yuta Terasaka ◽

Hiromi Yamazawa ◽

Jun Hirouchi ◽

Shigekazu Hirao ◽

Hiroki Sugiura ◽

...

Keyword(s):

Nuclear Power ◽

Pulse Height ◽

Height Distribution ◽

Air Concentration ◽

Power Station ◽

Pulse Height Distribution ◽

Detector Pulse ◽

Concentration Estimation ◽

Fukushima Daiichi ◽

Ibaraki Prefecture

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THE RESOLUTION CORRECTION IN THE SCINTILLATION SPECTROMETRY OF CONTINUOUS X RAYS

Canadian Journal of Physics ◽

10.1139/p58-163 ◽

1958 ◽

Vol 36 (12) ◽

pp. 1624-1633 ◽

Cited By ~ 17

Author(s):

W. R. Dixon ◽

J. H. Aitken

Keyword(s):

Integral Equation ◽

Numerical Analysis ◽

Numerical Methods ◽

Analytical Procedure ◽

Pulse Height ◽

Matrix Inversion ◽

Height Distribution ◽

X Rays ◽

Smooth Solutions ◽

Pulse Height Distribution

The problem of making resolution corrections in the scintillation spectrometry of continuous X rays is discussed. Analytical solutions are given to the integral equation which describes the effect of the statistical spread in pulse height. The practical necessity of making some kind of numerical analysis is pointed out. Difficulties with numerical methods arise from the fact that the observed pulse-height distribution cannot be defined precisely. As a result it is possible in practice only to find smooth "solutions". Additional difficulties arise if the numerical method is based on an invalid analytical procedure. For example matrix inversion is of doubtful value in making the resolution correction because there does not appear to be an inverse kernel for the integral equation in question.

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