The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve

Helmer, R.G.; Hardy, J.C.; Iacob, V. E.; Sanchez‐Vega, M.; Neilson, R. G.; Nelson, J.W.

doi:10.1016/s0168-9002(03)01942-9

Cited by 150 publications

(150 citation statements)

References 28 publications

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“…Their result, 1.29 (11), is statistically consistent with ours but is a factor of 6 less precise -see Eq. (8).…”

Section: Resultsmentioning

confidence: 99%

“…We take the ratio ǫ γ88 /ǫ K22.6 = 1.069(8) from our previously reported measurement [6]. The ratio ǫ γ150 /ǫ γ88.0 = 0.8707 (13) is determined from our known detector efficiency curve calculated with the CYLTRAN code [8], while ǫ K22.6 /ǫ K23.6 = 0.9849 (9) comes from a CYLTRAN calculation as well but in an energy region with higher uncertainty. Nevertheless, the energy span is so small that the uncertainty on the ratio is also very small (∼0.1%).…”

Section: Discussionmentioning

confidence: 99%

“…We acquired spectra with our precisely calibrated HPGe detector and with the same electronics used in its calibration [8]. Our analog-to-digital converter was an Ortec TRUMP T M -8k/2k card controlled by MAESTRO T M software.…”

Section: B Radioactive Decay Measurementsmentioning

confidence: 99%

“…What makes such precise measurements possible for us is our having an HPGe detector whose relative efficiency is known to ±0.15% (±0.20% absolute) over a wide range of energies: See, for example, Ref. [8]. By detecting both the K x rays and the γ rays from a transition of interest in the same wellcalibrated detector at the same time, we can avoid many sources of error.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
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We have measured the K-shell and total internal conversion coefficients, αK and αT , for the 150.8-keV E3 transition in 111 Cd to be 1.449 (18) and 2.217(26) respectively. The αK result agrees well with Dirac-Fock calculations in which the effect of the K-shell atomic vacancy is accounted for; it extends our precision tests of αK calculations to Z = 48, the lowest Z yet measured. However, the result for αT disagrees by about two standard deviations from the calculated αT value, whether or not the atomic vacancy is included.

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“…Their result, 1.29 (11), is statistically consistent with ours but is a factor of 6 less precise -see Eq. (8).…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: B Radioactive Decay Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
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show abstract

“…In particular, we used our HPGe detector, which has been efficiency calibrated to 0.15% relative precision between 50 keV and 1.4 MeV [12][13][14] at a source-detector distance of 151 mm. Three series of spectra were recorded: the first, consisting of spectrum 1 with source C1, and spectrum 2 with source O1, began 15 days (one half-life of 191 Os) after activation; the second, consisting of spectra 3-5 with C1, O1, and O2, respectively, began about 1.5 half-lives later; and the third, consisting of spectra 6 and 7 with C1 and O2, respectively, began about 2.5 half-lives after that.…”

Section: B Radioactive Decay Measurementsmentioning

confidence: 99%

Precise measurement ofK-shell fluorescence yield in iridium: An improved test of internal-conversion theory

et al. 2005

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We have measured the total intensity of K x rays relative to 129.4-keV γ rays from decay of the second excited state in 191 Ir. This (M1 + E2) transition was observed following the β decay of 15. 4-d 191 Os. Our measured ratio yields the result α K ω K = 2.044(11). When combined with a recent measurement of the same ratio for the 80.2-keV M4 transition from 193 Ir m , this result strongly confirms the need for the K-shell hole to be included in calculations of internal-conversion coefficients α K . Since the α K value calculated for the 191 Ir transition is virtually independent of the hole treatment, our result also yields a model-independent value for the iridium fluorescence yield, ω K = 0.954(9).

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Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

Sima

2012

Encyclopedia of Analytical Chemistry

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γ‐Ray spectrometry is a powerful nondestructive multielemental analysis technique. Its quantitative application requires efficiency calibration. Among the methods available for the computation of the efficiency calibration curve, Monte Carlo simulation is ever increasing in popularity. The need for Monte Carlo simulation is the consequence of the inability of experimental calibration to cope with the broader scope and measuring configurations (shape, volume, and matrices of the samples), with the enhanced coincidence‐summing nuclide specific effects (favored by the current tendency to use high‐efficiency detectors) and with the desired performance parameters (detection limit and uncertainty) met in present‐day applications of γ‐ray spectrometry. The availability of a variety of Monte Carlo packages that can be applied to efficiency computation, several of them user friendly indeed, enlarged the class of potential users of this method. While experimental calibration remains the preferred method in the case of point sources and specific volume sources, such as solutions, it is the flexibility of Monte Carlo calculation that can provide a comprehensive calibration of γ‐ray detectors for a broad range of applications. In this article, the principles of Monte Carlo method are introduced, the applications to detector simulation are presented, and the solutions of typical problems in the calibration of γ‐spectrometry systems are reviewed.

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The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve

Cited by 150 publications

References 28 publications

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
View full text Add to dashboard Cite

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
View full text Add to dashboard Cite

Precise measurement ofK-shell fluorescence yield in iridium: An improved test of internal-conversion theory

Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

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The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve

Cited by 150 publications

References 28 publications

Precise measurement ofαKandαTfor the 150.8-keVE3transition inNica1, Hardy2, Iacob3 et al. 2016Phys. Rev. C132150View full textAdd to dashboardCite

Precise measurement ofαKandαTfor the 150.8-keVE3transition inNica1, Hardy2, Iacob3 et al. 2016Phys. Rev. C132150View full textAdd to dashboardCite

Precise measurement ofK-shell fluorescence yield in iridium: An improved test of internal-conversion theory

Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

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Product

Resources

About

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
View full text Add to dashboard Cite

Precise measurement ofαKandαTfor the 150.8-keVE3transition in
Nica
¹
,
Hardy
²
,
Iacob
³

et al. 2016
Phys. Rev. C
13
2
15
0
View full text Add to dashboard Cite