Determination of radioactive bulk and surface concentration by beta-detection

I. Quantitative analysis

J. Solymosi, P. Zagyvai, L. Nagy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The activity concentration of bulk and surface samples contaminated with β-emitting radioisotopes is difficult to measure without the "a priori" knowledge of the nature of the non-gamma emitting components. Beta-emitters cannot be identified from any measured spectral distribution. The counting efficiency of the measuring system changes significantly with β-energy so it cannot be assumed to have a single value obtained with a standard source with known energy. Application of an energy selective β-detector is introduced for determining bulk and surface activity concentration. Samples of "infinitely thick" or "infinitely thin" nature are to be prepared. The distribution of β-energy deposited in the detector is registered as counts in 8 or 16 energy intervals. No information is needed on the qualitative composition of the sample. Normalised integral distributions (intensity ratios) are derived from the count rates of the intervals. These distributions are then compared to calibrated intensity ratios obtained with suitable standard sources. An average (effective) counting efficiency is generated from this comparison by a special algorithm. Activity concentration of an unknown sample is then obtained using this average efficiency. Calibration and sensitivity data are presented for different types of bulk and surface samples.

Original languageEnglish
Pages (from-to)3-14
Number of pages12
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume209
Issue number1
Publication statusPublished - 1996

Fingerprint

Chemical analysis
Radioisotopes
Calibration
Detectors

ASJC Scopus subject areas

  • Analytical Chemistry
  • Inorganic Chemistry
  • Nuclear Energy and Engineering

Cite this

Determination of radioactive bulk and surface concentration by beta-detection : I. Quantitative analysis. / Solymosi, J.; Zagyvai, P.; Nagy, L.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 209, No. 1, 1996, p. 3-14.

Research output: Contribution to journalArticle

@article{e2014a9f3cb245f7a6a88f3e458354ca,
title = "Determination of radioactive bulk and surface concentration by beta-detection: I. Quantitative analysis",
abstract = "The activity concentration of bulk and surface samples contaminated with β-emitting radioisotopes is difficult to measure without the {"}a priori{"} knowledge of the nature of the non-gamma emitting components. Beta-emitters cannot be identified from any measured spectral distribution. The counting efficiency of the measuring system changes significantly with β-energy so it cannot be assumed to have a single value obtained with a standard source with known energy. Application of an energy selective β-detector is introduced for determining bulk and surface activity concentration. Samples of {"}infinitely thick{"} or {"}infinitely thin{"} nature are to be prepared. The distribution of β-energy deposited in the detector is registered as counts in 8 or 16 energy intervals. No information is needed on the qualitative composition of the sample. Normalised integral distributions (intensity ratios) are derived from the count rates of the intervals. These distributions are then compared to calibrated intensity ratios obtained with suitable standard sources. An average (effective) counting efficiency is generated from this comparison by a special algorithm. Activity concentration of an unknown sample is then obtained using this average efficiency. Calibration and sensitivity data are presented for different types of bulk and surface samples.",
author = "J. Solymosi and P. Zagyvai and L. Nagy",
year = "1996",
language = "English",
volume = "209",
pages = "3--14",
journal = "Journal of Radioanalytical and Nuclear Chemistry",
issn = "0022-4081",
publisher = "Elsevier BV",
number = "1",

}

TY - JOUR

T1 - Determination of radioactive bulk and surface concentration by beta-detection

T2 - I. Quantitative analysis

AU - Solymosi, J.

AU - Zagyvai, P.

AU - Nagy, L.

PY - 1996

Y1 - 1996

N2 - The activity concentration of bulk and surface samples contaminated with β-emitting radioisotopes is difficult to measure without the "a priori" knowledge of the nature of the non-gamma emitting components. Beta-emitters cannot be identified from any measured spectral distribution. The counting efficiency of the measuring system changes significantly with β-energy so it cannot be assumed to have a single value obtained with a standard source with known energy. Application of an energy selective β-detector is introduced for determining bulk and surface activity concentration. Samples of "infinitely thick" or "infinitely thin" nature are to be prepared. The distribution of β-energy deposited in the detector is registered as counts in 8 or 16 energy intervals. No information is needed on the qualitative composition of the sample. Normalised integral distributions (intensity ratios) are derived from the count rates of the intervals. These distributions are then compared to calibrated intensity ratios obtained with suitable standard sources. An average (effective) counting efficiency is generated from this comparison by a special algorithm. Activity concentration of an unknown sample is then obtained using this average efficiency. Calibration and sensitivity data are presented for different types of bulk and surface samples.

AB - The activity concentration of bulk and surface samples contaminated with β-emitting radioisotopes is difficult to measure without the "a priori" knowledge of the nature of the non-gamma emitting components. Beta-emitters cannot be identified from any measured spectral distribution. The counting efficiency of the measuring system changes significantly with β-energy so it cannot be assumed to have a single value obtained with a standard source with known energy. Application of an energy selective β-detector is introduced for determining bulk and surface activity concentration. Samples of "infinitely thick" or "infinitely thin" nature are to be prepared. The distribution of β-energy deposited in the detector is registered as counts in 8 or 16 energy intervals. No information is needed on the qualitative composition of the sample. Normalised integral distributions (intensity ratios) are derived from the count rates of the intervals. These distributions are then compared to calibrated intensity ratios obtained with suitable standard sources. An average (effective) counting efficiency is generated from this comparison by a special algorithm. Activity concentration of an unknown sample is then obtained using this average efficiency. Calibration and sensitivity data are presented for different types of bulk and surface samples.

UR - http://www.scopus.com/inward/record.url?scp=0029803352&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029803352&partnerID=8YFLogxK

M3 - Article

VL - 209

SP - 3

EP - 14

JO - Journal of Radioanalytical and Nuclear Chemistry

JF - Journal of Radioanalytical and Nuclear Chemistry

SN - 0022-4081

IS - 1

ER -