Note on the scattering corrections in 2πα counting

Ballaux, C.

doi:10.1016/0020-708x(85)90035-3

Cited by 12 publications

(3 citation statements)

References 16 publications

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“…As electrons backscatter easily from the backing, the applicability is limited to alpha-particle emitters, for which significant correction factors have to be taken into account [7]. These have been studied theoretically [25][26][27][28], experimentally [29][30][31][32][33][34] and by simulations [35][36][37][38][39]. From the energy and angular distribution of the backscattered αparticles, one can conclude that backscattering is primarily due to a large number of interactions with atomic electrons and rarely by nuclear collisions (Rutherford scattering).…”

Section: π Proportional Countingmentioning

confidence: 99%

Methods for primary standardization of activity

Pommé

2007

Metrologia

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Section: π Proportional Countingmentioning

confidence: 99%

Methods for primary standardization of activity

Pommé

2007

Metrologia

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“…Traditionally these corrections were evaluated theoretically by using simplified scattering models, such as those of Crawford [1], White [2] or Lucas and Hutchinson [3]. Some results for the experimental determination of the backscattering coefficient are given in the literature [4][5][6][7], although they are generally subject to large uncertainties because the net contribution of the backscattered particles to the total counting rate is low.…”

Section: Introductionmentioning

confidence: 99%

A comparison between the codes SRIM and AlfaMC in the Monte Carlo simulation of alpha-particle backscattering

Vargas

Timón

2015

J Radioanal Nucl Chem

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The well-known code Stopping and Range of Ions in Matter (SRIM) and the more recent code AlfaMC were used in this work to evaluate the backscattering corrections required in the measurement of alpha particle sources. The differences found in the energy and angular distribution of backscattered particles for point sources mounted on backings of aluminum, silver, and platinum, were analyzed taking into account the models of multiple scattering included in each code. The lateral dispersion of alpha particles and the backscattering coefficients obtained with SRIM were in all the cases some greater than those derived with AlfaMC.

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“…These corrections have been theoretically studied by several workers [1][2][3][4][5], generally assuming models that take into account the multiple scattering of particles, most of them based on the general theory of multiple scattering from Williams [6]. These corrections can also be estimated experimentally [7][8][9][10], but it requires the measurement of a great number of sources prepared with a wide range of thicknesses and using a substrate with a similar chemical composition to the source of interest. An alternative method to calculate the desired corrections to the counting rate in 2 detection systems is the use of Monte Carlo simulation to model the behavior of the particles in the source and backing.…”

Section: Introductionmentioning

confidence: 99%

Application of the new Monte Carlo code AlfaMC to the calibration of alpha-particle sources

2015

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Abstract. Measurements of -particle sources require corrections to the counting rate due to scattering and self--absorption in the source and the backing material. In this study, we describe a simple procedure to estimate these corrections using the new Monte Carlo code AlfaMC to consider the effects of scattering and self-absorption conjointly, and so to determine the activity of  emitters. The procedure proposed was applied to 235 UO 2 sources deposited on highly polished platinum backings. In general, the dependence of the effi ciency with source thickness was in good agreement with a simple model considering a linear and a hyperbolic behavior for thin and thick sources, respectively, although signifi cant deviations from this model were found for very thin sources. For these very thin sources, the Monte Carlo simulation revealed to be as a required method in the primary calibration of -particle sources. The effi ciency results obtained by simulation with AlfaMC were in agreement with available effi ciency data.

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Note on the scattering corrections in 2πα counting

Cited by 12 publications

References 16 publications

Methods for primary standardization of activity

Methods for primary standardization of activity

A comparison between the codes SRIM and AlfaMC in the Monte Carlo simulation of alpha-particle backscattering

Application of the new Monte Carlo code AlfaMC to the calibration of alpha-particle sources

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