M sub-shell X-ray fluorescence cross-section measurements for six elements in the range Z = 78–92 at tuned synchrotron photon energies 5, 7 and 9 keV.

Bansal, Himani; Tiwari, M. K.; Mittal, Raj

doi:10.1016/j.jqsrt.2017.09.026

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…It can be achieved more studies about the M shell calculations or measurements using different irradiation source, different elements, different angles and different energy ranges [14][15][16][17][18][19][20][21][22][23]. Due to the complexity structure of M shell, the parameters were determined for pure elements and different energy ranges.…”

Section: Introductionmentioning

confidence: 99%

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

Aylikçi¹,

Aylıkçı²,

Tıraşoğlu³

et al. 2019

Adıyaman University Journal of Science

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In this study, Mβα X-ray production cross-sections and average M-shell fluorescence yields were determined by using EDXRF at 5.96 keV for Pt, Au and Tl compounds. The photo-peak areas were used for the measurement of M X-ray production cross-sections and also other parameters. The obtained values were compared with the theoretical values in the literature to explain the changes in parameters. It was obtained that the changes were resulted from the electronegativity differences between Pt, Br and O in Pt compounds and Au, Br and O in Au compounds. As for Tl compounds, it was obtained different results and attributed to both of the charge transfer from one element to another and polarizability mechanisms of Tl. Öz Bu çalışmada, Mβα X-ışını üretim tesir kesitleri ve ortalama M kabuğu flüoresans verimleri 5.96 keV enerjide, EDXRF yöntemi kullanılarak Pt, Au ve Tl bileşikleri için belirlenmiştir. Foto-piklerin altında kalan alanlar M X-ışını üretim tesir kesitlerinin ve aynı zamanda diğer parametrelerin ölçülmesinde kullanılmıştır. Elde edilen değerler, parametrelerdeki değişimi açıklamak için literatürdeki teorik değerlerle kıyaslanmıştır. Değişimlerin Pt bileşiklerinde Pt, Br ve O arasındaki, Au bileşiklerinde ise Au, Br ve O elementleri arasındaki elektronegativite farkından kaynaklandığı belirtilmiştir. Tl bileşiklerinde ise değişimler hem bir elementten diğerine yük transferi hem de Tl elementinin polarize olabilmesi mekanizmalarına atfedilmiştir. Anahtar Kelimeler: Mβα X-ışını üretim tesir kesiti, Ortalama M kabuğu flüoresans verimi, EDXRF

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Section: Introductionmentioning

confidence: 99%

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

Aylikçi¹,

Aylıkçı²,

Tıraşoğlu³

et al. 2019

Adıyaman University Journal of Science

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“…These measurements involved the creation of M i ( i = 1–5) subshell vacancies through the direct photoionization only. Most of these measurements were performed in air using radioisotopes, the X‐ray tubes with secondary exciter and the synchrotron radiation as photon source employing infinitely thick targets thereby resulting in large corrections due to the absorption of low energy (~1–3 keV) M shell X‐rays by the target itself and the air path between the target and the X‐ray detector. Therefore, the measured cross sections were not very reliable as these have large uncertainty due to use of theoretical total X‐ray mass‐attenuation coefficients for evaluating the absorption corrections.…”

Section: Introductionmentioning

confidence: 99%

“…The total/line resolved M shell XRP cross sections for some heavy elements (Z ≥ 70) measured at different incident photon energies in the range 6–12 keV (

E_{{normalM}_{1}} < E_{inc} < E_{{normalL}_{3}}

;

E_{{normalM}_{1}}

E_{{normalL}_{3}}

represent M 1 /L 3 subshell absorption edge energy) reported by different authors are available in the literature. These measurements involved the creation of M i ( i = 1–5) subshell vacancies through the direct photoionization only.…”

Section: Introductionmentioning

confidence: 99%

Cascade M_i (i = 1–5) subshell X‐ray emission at incident photon energies across the L_j (j = 1–3) subshell absorption edges of ₆₆Dy

et al. 2018

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The total M shell and the Mk (k = ξ, αβ, γ, m) X‐ray production cross sections for 66Dy have been measured at incident photon energies across its Lj (j = 1–3) subshell absorption edge energies, ranging 7.8–9.2 keV. This study aims to investigate the evolution of the probability for cascade decay of Lj subshell vacancies as the tunable incident energy ionizes progressively different 66Dy Lj subshells. The experimental X‐ray production cross sections have been compared with theoretical ones calculated using the nonrelativistic Hartree–Fock–Slater (HFS) model‐based photoionization cross sections; three sets of the X‐ray emission rates, fluorescence and Coster–Kronig yield based on the nonrelativistic Hartree–Slater (NRHS) model, Dirac–Hartree–Slater (DHS) model and Dirac–Fock (DF) model; the Lj (j = 1–3) subshell to the Mi (i = 1–5) subshell vacancy transfer probabilities evaluated in the present work. Presently measured total M shell and the Mαβ X‐ray production cross sections are found to be significantly lower than the theoretical ones evaluated using physical parameters based on the relativistic Dirac–Fock/Dirac–Hartree–Slater model calculations, whereas a much better agreement is observed with respect to the NRHS model‐based calculations; however, the measured X‐ray production cross sections are still systematically lower than the NRHS values.

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Updated database, new empirical and theoretical values of average L shell fluorescence yields of elements with 23≤Z≤96

Sahnoune

Kahoul

Daoudi

et al. 2020

Radiation Physics and Chemistry

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M sub-shell X-ray fluorescence cross-section measurements for six elements in the range Z = 78–92 at tuned synchrotron photon energies 5, 7 and 9 keV.

Cited by 4 publications

References 25 publications

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

Cascade M_i (i = 1–5) subshell X‐ray emission at incident photon energies across the L_j (j = 1–3) subshell absorption edges of ₆₆Dy

Updated database, new empirical and theoretical values of average L shell fluorescence yields of elements with 23≤Z≤96

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M sub-shell X-ray fluorescence cross-section measurements for six elements in the range Z = 78–92 at tuned synchrotron photon energies 5, 7 and 9 keV.

Cited by 4 publications

References 25 publications

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

M shell Fluorescence Parameters of Pt, Au and Tl Compounds with Oxygen and Bromide

Cascade Mi (i = 1–5) subshell X‐ray emission at incident photon energies across the Lj (j = 1–3) subshell absorption edges of 66Dy

Updated database, new empirical and theoretical values of average L shell fluorescence yields of elements with 23≤Z≤96

Contact Info

Product

Resources

About

M sub-shell X-ray fluorescence cross-section measurements for six elements in the range Z = 78–92 at tuned synchrotron photon energies 5, 7 and 9 keV.

Cascade M_i (i = 1–5) subshell X‐ray emission at incident photon energies across the L_j (j = 1–3) subshell absorption edges of ₆₆Dy