Measurement of relative K X-ray intensity ratio following radioactive decay and photoionization

Yalçın, Paşa

doi:10.1016/j.nimb.2006.11.051

Cited by 21 publications

(2 citation statements)

References 18 publications

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“…X-rays are produced in different ways, such as photoninduced, proton-induced, ion-induced, and radioactive decay followed by X-ray emission (electron capture (EC) process and internal conversion (IC) of gamma transitions). It is reported that the change in the charge of nucleus and recoiling of the nucleus during EC process affects the X-ray emission probabilities [1,2]. On the contrary, this effect is not observed to be there when X-rays are produced via photon excitation methods.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, this effect is not observed to be there when X-rays are produced via photon excitation methods. Therefore, values of K shell X-ray intensity ratios following EC decay are different from the values obtained from photon-induced excitations [1][2][3][4][5][6][7]. The K shell X-ray intensity ratios of elements following photoionization have been extensively studied by several researchers employing reflection geometry methods [8,9].…”

Section: Introductionmentioning

confidence: 99%

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K shell X-ray intensity ratios and vacancy transfer probabilities of Fe, Ag, and Te following electron capture decay

GeorgeLinu

JosephDaisy

2014

Can. J. Phys.

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The K shell X-ray photons of Fe, Ag, and Te following the electron capture decay of Co 57 , Cd 109 , and I 125 , respectively, were detected using Si(Li) detector coupled to PC-based 8k multichannel analyzer employing a simple method suggested earlier by our group. The calculated K shell X-ray intensity ratios and vacancy transfer probabilities for these elements are compared with the theoretical values predicted by Scofield and with others' experimental values obtained via photoionization. It is found that the ⌲ ␤ to ⌲ ␣ X-ray intensity ratio of Fe is lower by 4.0%, while that of Ag and Te are greater by 7.9% and 19.1%, respectively, from the theoretical values. These deviations may be attributed to the exchange interactions occurring between the 3p-3d shell electrons as well as the recoil effect of the nucleus due to neutrino emission. PACS Nos.: 32.30.Rj, 32.80.Fb, 78.70.En. Résumé :Les photons X de la couche K dans le Fe, l'Ag et le Te, suivant la capture électronique par le Co 57 , le Cd 109 et l'I 125 sont détectés ici par des détecteurs Si(Li) couplés à un analyseur multicanaux 8k qui emploie une méthode simple proposée plus tôt par notre groupe. Nous comparons les rapports d'intensité des rayons X de la couche K et les probabilités de transfert de lacunes, avec les valeurs théoriques de Scofield et avec d'autres résultats expérimentaux obtenus de la photo-ionisation. Nous trouvons que le rapport d'intensité K ␤ sur K ␣ dans le Fe est 4% plus faible que la valeur théorique, alors qu'il est plus élevé de 7,9 % et 19,1 % dans l'Ag et le Te, respectivement. Ces déviations peuvent être attribuées aux interactions d'échange dans les couches électro-niques 3p-3d, ainsi qu'aux effets de recul du noyau suite à l'émission du neutrino. [Traduit par la Rédaction]

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

K shell X-ray intensity ratios and vacancy transfer probabilities of Fe, Ag, and Te following electron capture decay

GeorgeLinu

JosephDaisy

2014

Can. J. Phys.

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The investigation of K-shell fluorescence parameters of Zn-Fe alloys with different grain size and microstrain values

et al. 2017

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It is known that zinc alloys with iron group metals have better corrosion resistance than pure zinc. Owing to the corrosion resistance of these alloys, Zn-Fe coatings are widely used in automotive industry and have excellent mechanical performance. In this work, we investigated the relationship between the changes in the measured X-ray fluorescence parameters (K β /K α , σ Kα and σ Kβ ) and the changes in the structural parameters such as microstrain or grain size values for Zn-Fe alloys that were prepared with different pH values. To explain these changes, the K α and K β X-ray production cross sections, and the K β /K α X-ray intensity ratio values were calculated by three different ways for the elemental forms of Zn and Fe. The structural parameters, such as microstrain and grain size, were also calculated. We expect that the outer shell electronic distribution affects the structural parameters of the produced Zn-Fe alloys, changing the measured K α and K β X-ray production cross sections, and the K β /K α X-ray intensity ratio values. We also show that Zn-Fe alloy mi nimum microstrain value corresponds to the maximum changes in K β X-ray production cross-section values of Fe and Zn.

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Multiconfiguration Dirac–Fock calculations of Zn K‐shell radiative and nonradiative transitions

et al. 2019

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Zinc K‐shell radiative and radiationless transition rates are calculated using the multiconfiguration Dirac–Fock method. Correlation up to the 4p orbital is included in almost all transition rate calculations. Calculated radiative transition rates and transition probabilities are compared with Scofield's Dirac–Hartree–Slater and Dirac–Hartree–Fock calculations, presenting good agreement with the later. Radiative transition intensity ratios involving the strongest lines are compared with theoretical, experimental, and empirical‐fit values. Most ratios are in close agreement with the empirical‐fit values from NIST's Fundamental Parameters database. Calculated radiationless transition rates and ratios are compared with Chen et al.'s Dirac–Fock values and Safronova et al.'s Dirac–Fock values. The K‐LL transition rates are overall lower than Chen et al.'s values, whereas the K‐LX and K‐XY transition rates are overall higher. Calculated K‐LX/K‐LL and K‐XY/K‐LL ratios are relatively close to the experimental values compared. Some calculated intensities relative to K‐L are in good agreement with the experimental values, whereas others present worse agreement. The calculated fluorescence yield is higher than all theoretical, experimental, and empirical‐fitted values compared, probably because the total radiationless transition rate value calculated in the present work is relatively low.

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Measurement of relative K X-ray intensity ratio following radioactive decay and photoionization

Cited by 21 publications

References 18 publications

K shell X-ray intensity ratios and vacancy transfer probabilities of Fe, Ag, and Te following electron capture decay

K shell X-ray intensity ratios and vacancy transfer probabilities of Fe, Ag, and Te following electron capture decay

The investigation of K-shell fluorescence parameters of Zn-Fe alloys with different grain size and microstrain values

Multiconfiguration Dirac–Fock calculations of Zn K‐shell radiative and nonradiative transitions

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