High-resolution x-ray spectra from highly charged Si, S and Cl ions showing evidence of fluorescence active resonant states

Kasthurirangan, S; Saha, Jayanta K.; Agnihotri, A. N.; Banerjee, A; Kumar, Ajay; Misra, Deepankar; Santos, J. P.; Costa, Ana Maria Medeiros da; Indelicato, P.; Mukherjee, Tapan Kumar; Tvibedi, L C

doi:10.1088/1742-6596/488/13/132027

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The need of data related to the interactions of light with matter is important in the development of research tools in several fields, such as fundamental physics [1], spectroscopy [2], plasma physics [3], and astrophysics [4]. Atomic calculations constitute an important source of information that partially fulfill this need.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Parameters Related to Selenium Kα and Kβ Emission X-ray Spectra

Guerra

Sampaio

Vília

et al. 2021

Atoms

View full text Add to dashboard Cite

We present relativistic ab initio calculations of fundamental parameters for atomic selenium, based on the Multiconfiguration Dirac-Fock method. In detail, fluorescence yields and subshell linewidths, both of K shell, as well as Kβ to Kα intensity ratio are provided, showing overall agreement with previous theoretical calculations and experimental values. Relative intensities were evaluated assuming the same ionization cross-section for the K-shell hole states, leading to a statistical distribution of these initial states. A method for estimating theoretical linewidths of X-ray lines, where the lines are composed by a multiplet of fine-structure levels that are spread in energy, is proposed. This method provides results that are closer to Kα1,2 experimental width values than the usual method, although slightly higher discrepancies occur for the Kβ1,3 lines. This indicates some inaccuracies in the calculation of Auger rates that have a higher contribution for partial linewidths of the subshells involved in the Kβ1,3 profile. Apart from this, the calculated value of Kβ to Kα intensity ratio, which is less sensitive to Auger rates issues, is in excellent agreement with recommended values.

show abstract

Section: Introductionmentioning

confidence: 99%

Fundamental Parameters Related to Selenium Kα and Kβ Emission X-ray Spectra

Guerra

Sampaio

Vília

et al. 2021

Atoms

View full text Add to dashboard Cite

show abstract

“…The knowledge of accurate fluorescence yields in the X-ray regime is of great importance in many areas of physics and technology, such as fundamental physics [1], biological studies [2,3], biomedical [4,5], environmental sciences [6], spectroscopy [7,8], plasma physics [9], nanoelectronics and microelectronics [10,11], and astrophysics [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical approaches for determining the K-shell fluorescence yield of carbon

Hönicke,

Unterumsberger,

Guerra

et al. 2021

Preprint

View full text Add to dashboard Cite

The knowledge of atomic fundamental parameters, such as the fluorescence yields with low uncertainties, is of decisive importance in elemental quantification involving X-ray fluorescence analysis techniques. However, especially for the low-Z elements, the available literature data are either of poor quality, of unknown or very large uncertainty, or both. For this reason, the K-shell fluorescence yield of carbon was determined in the PTB laboratory at the synchrotron radiation facility BESSY II. In addition, theoretical calculations of the same parameter were performed using the multiconfiguration Dirac-Fock method, including relativistic and quantum electrodynamics (QED) corrections. Both values obtained in this work are compared to the corresponding available literature data.

show abstract

High-resolution x-ray spectra from highly charged Si, S and Cl ions showing evidence of fluorescence active resonant states

Cited by 2 publications

References 8 publications

Fundamental Parameters Related to Selenium Kα and Kβ Emission X-ray Spectra

Fundamental Parameters Related to Selenium Kα and Kβ Emission X-ray Spectra

Experimental and theoretical approaches for determining the K-shell fluorescence yield of carbon

Contact Info

Product

Resources

About