Dead-time corrections in the measurement of short-lived radionuclides

Axton, E.J.; Ryves, T.B.

doi:10.1016/0020-708x(63)90111-x

Cited by 29 publications

(13 citation statements)

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“…Activation analysis was carried out on samples from rod 9 and 14. measured by the double-pulse and two-source methods. Deadtime counting losses were corrected according to Axton and Ryves [16].…”

Section: Molar Massmentioning

confidence: 99%

The Avogadro constant — Recent results on the molar volume of silicon

Seyfried

Balhorn

Kochsiek

et al. 1987

IEEE Trans. Instrum. Meas.

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The density p of two silicon crystals has been determined by precision hydrostatic weighing, based on very accurate solid density standards (SDS's). Densities of additional crystals were gained from density differences measured by the temperature-of-f1oatation method. The molar mass M of the crystals was determined by comparing the isotopic abundances against the known abundances of the National Bureau of Standards (NBS) reference material SRM 990 using activation analysis and mass spectroscopy. Combining the measured values for M and p leads to M / p = (12.058 822 ± 0.000 013) cnr' / mol. With the known volume of the unit cell the following value for the Avogadro constant was calculated: N A = (6.022 137 ± 0.000 007) x 10 23 mol-I.

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Section: Molar Massmentioning

confidence: 99%

The Avogadro constant — Recent results on the molar volume of silicon

Seyfried

Balhorn

Kochsiek

et al. 1987

IEEE Trans. Instrum. Meas.

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“…For non-extending dead time, Axton and Ryves (1963) derived their equation (4) for their error “ k ”, which is a measure of our f d −1 .

f_{d} - 1 \approx \frac{ñ τ {false(λ T_{tot} false)}^{2}}{12},

where their ñ is the observed average count rate, without dead-time correction, that is, N L / T tot .…”

Section: Comparisons To Previous Derivationsmentioning

confidence: 99%

“…Axton and Ryves (1963) derived an approximate correction formula with leading-order expansion for the count rate at the start of the counting period for non-extending dead times. Müller (1981) derived expressions for non-extending and extending systems without live-timing.…”

Section: Introductionmentioning

confidence: 99%

Corrections for the combined effects of decay and dead time in live-timed counting of short-lived radionuclides

Fitzgerald

2016

Applied Radiation and Isotopes

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Studies and calibrations of short-lived radionuclides, for example 15O, are of particular interest in nuclear medicine. Yet counting experiments on such species are vulnerable to an error due to the combined effect of decay and dead time. Separate decay corrections and dead-time corrections do not account for this issue. Usually counting data are decay-corrected to the start time of the count period, or else instead of correcting the count rate, the mid-time of the measurement is used as the reference time. Correction factors are derived for both those methods, considering both extending and non-extending dead time. Series approximations are derived here and the accuracy of those approximations are discussed.

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“…The resolving time of the counter was determined by the method described by Marais, Karsten, Lotz & Smit (1966) by using 28Al. All samples and standards were counted for 1 min and mean counting rates were corrected for background and resolving time losses and were converted to instantaneous count rates as described by Axton & Ryves (1963). Instantaneous counting rates were corrected for decay using a half-life of 2,28 min.…”

Section: Radiometric Analysismentioning

confidence: 99%

Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

Kotze

Joubert

Villiers

et al. 1984

South African Journal of Plant and Soil

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Isotopically exchangeable AI was determined in soils and clay minerals by equilibration with 28AI. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable AI was indepen· dent of the amount of carrier·AI added with the 28AI. In some soils isotopically exchangeable AI did not appear to be related to the amount of AI which could be extracted by various electrolyte solutions. This technique provides an improved means of studying the exchange reactions of AI in acid soils and clay minerals. S. Afr. J. Plant Soil 1984, 1: 57 -60Isotopies-uitruilbare AI is in gronde en kleiminerale bepaal deur ekwilibrasie met 28AI. Die beste resultate is verkry wanneer 'n swak ekstraheermiddel gebruik is met 'n ekwilibrasietyd van agt minute. Die berekende hoeveelheid isotopies-uitruilbare AI was onafhanklik van die hoeveelheid draer-AI wat saam met 28AI toegedien is. In sommige gronde is isotopies-uitruilbare AI skynbaar nie verwant aan die hoeveelheid AI wat met verskillende elektrolietoplossings geekstraheer kon word nie. Hierdie tegniek bied 'n verbeterde metode vir die bestudering 'Ian die uitruilreaksies van AI in suur gronde en kleiminerale.S.-Afr. Tydskr. Plant Grand 1984,1: 57-60

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Dead-time corrections in the measurement of short-lived radionuclides

Cited by 29 publications

References 0 publications

The Avogadro constant — Recent results on the molar volume of silicon

The Avogadro constant — Recent results on the molar volume of silicon

Corrections for the combined effects of decay and dead time in live-timed counting of short-lived radionuclides

Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange

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