High accuracy experimental determination of copper and zinc mass attenuation coefficients in the 100 eV to 30 keV photon energy range

Ménesguen, Y.; Gerlach, Martin; Pollakowski, B.; Unterumsberger, Rainer; Haschke, Michael; Beckhoff, Burkhard; Lépy, Marie‐Christine

doi:10.1088/0026-1394/53/1/7

Cited by 34 publications

(50 citation statements)

References 19 publications

(45 reference statements)

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“…The comparison with the absolute angles gives an offset that is provided to the monochromator device. The residual difference between the angular position given by the encoder and the values derived from the tabulated absorption edges is presented in [7] and is kept below 0.04%. The minimization of harmonics or stray light are managed in the same way as detailed in [7].…”

Section: The Hard X-ray Branch At Soleil Metrology Beamlinementioning

confidence: 99%

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Experimental determination of the x-ray atomic fundamental parameters of nickel

et al. 2017

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X-ray atomic properties of nickel were investigated in a singular approach that combines different experimental techniques to obtain new and useful reliable values of atomic fundamental parameters for X-ray spectrometric purposes and for comparison to theoretical predictions. We determined the mass attenuation coefficients in an energy range covering the L-and K-absorption edges, the K-shell fluorescence yield and the Kβ/Kα and Kβ 1,3/K α1,2 transition probability ratios. The obtained line profiles and linewidths of the Kα and Kβ transitions in Ni can be considered as the contribution of the satellite lines arising from the [KM] shake processes suggested by Deutsch et al. [1] and Ito et al. [2]. Comparison of the new data with several databases showed a good agreement but also discrepancies were found with existing tabulated values.

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Section: The Hard X-ray Branch At Soleil Metrology Beamlinementioning

confidence: 99%

“…The LNHB carried out the measurements of absolute mass attenuation coefficients using a transmission method of thin films [7]. As the photon energy decreases, the higher is the attenuation and the thinner the film has to be.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the x-ray atomic fundamental parameters of nickel

et al. 2017

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“…These coefficients were obtained following an experimental procedure previously established and validated for similar measurements on germanium, copper and other metallic targets. [10][11][12] Mass attenuation coefficients, μ ρ E ð Þ, were measured in transmission mode using a monochromatic parallel photon beam with energy E under normal incidence to the sample with thickness x. The principle of the measurement consists in measuring the intensity of photon flux before the sample, I 0 (E), and immediately after it I(E).…”

Section: Mass Attenuation Coefficientsmentioning

confidence: 99%

“…The experiment included two steps: First, accurate values of the attenuation coefficients of niobium and rhodium were measured at the SOLEIL synchrotron, [9] using procedures such as optimized for similar measurements. [10,11] In a second step, the fluorescence yields were determined in a traditional experimental configuration where the target is installed at 45°b oth from the incident radiation and from an energy-dispersive detector. [12] Experimental procedure Most of the experiments were conducted at the Metrology beam line of the SOLEIL synchrotron facility (proposal 20160731).…”

Section: Introductionmentioning

confidence: 99%

Measurement of K fluorescence yields of niobium and rhodium using monochromatic radiation

et al. 2017

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Both reactions Nb-93(n,n 0 )Nb-93 m and Rh-103(n,n 0 )Rh-103 m are of particular importance for dosimetry in reactor, and the measurement of the activity of Nb and Rh dosimeters provides the basic data that can be traced back to the reactor operating information. These radionuclides emit only X-rays of which emission intensities in recommended data are determined thanks to the γ-ray transition probabilities and fluorescence yield values. In general, the knowledge of fluorescence yields is rather poor and based on old measurements. Nowadays, the use of tunable monochromatic X-ray sources allows performing optimized measurements. In a first step, accurate values of the attenuation coefficients are measured at the metrology beam line of the SOLEIL synchrotron, using procedures such as optimized for similar measurements. In a second step, the fluorescence yields are determined using experimental approaches in a traditional experimental configuration. For both materials, several incident energies are used to get experimental spectra with energy-dispersive spectrometer. The peaks of interest are processed using the COLEGRAM software, which allows detailed fitting of the peak shape. The K fluorescence yields are derived with about 2% relative uncertainty.

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“…These coefficients were obtained following an experimental procedure previously established and validated for similar measurements on different metallic targets [12,13]. Mass attenuation coefficients, were measured in transmission mode using a monochromatic parallel photon beam with energy E, under normal incidence to the sample with thickness x.…”

Section: Mass Attenuation Coefficientsmentioning

confidence: 99%

Improvement of ^93mNb and ^103mRh activity measurement methodology for reactor dosimetry

et al. 2017

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Abstract. Reactor dosimetry is based on the analysis of the activity of irradiated dosimeters, such as 93m Nb and 103m Rh. The activity measurement of these dosimeters is conventionally performed by X-ray spectrometry, but the low-energy of emitted photons makes it difficult to derive reliable results with low uncertainties. Approaches to improve these characterisations are presented: they include high accuracy efficiency calibration of a HPGe detector using both experiments and Monte Carlo simulation, calculation of corrective factors for the geometry (selfabsorption) and self-fluorescence effects. Improvement of the knowledge of the 103m Rh decay scheme is also required and a specific experiment is proposed, including activity measurement of a 103m Rh solution by liquid scintillation, and measurement of the photon emission intensities by X-ray spectrometry. A method for calculating coefficients to take into account the self-fluorescence effects in dosimeters is also suggested to improve the uncertainties on activity measurements.

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High accuracy experimental determination of copper and zinc mass attenuation coefficients in the 100 eV to 30 keV photon energy range

Cited by 34 publications

References 19 publications

Experimental determination of the x-ray atomic fundamental parameters of nickel

Experimental determination of the x-ray atomic fundamental parameters of nickel

Measurement of K fluorescence yields of niobium and rhodium using monochromatic radiation

Improvement of ^93mNb and ^103mRh activity measurement methodology for reactor dosimetry

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High accuracy experimental determination of copper and zinc mass attenuation coefficients in the 100 eV to 30 keV photon energy range

Cited by 34 publications

References 19 publications

Experimental determination of the x-ray atomic fundamental parameters of nickel

Experimental determination of the x-ray atomic fundamental parameters of nickel

Measurement of K fluorescence yields of niobium and rhodium using monochromatic radiation

Improvement of 93mNb and 103mRh activity measurement methodology for reactor dosimetry

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Improvement of ^93mNb and ^103mRh activity measurement methodology for reactor dosimetry