Theoretical investigation of spectroscopic properties of $W^{25+}$

Abstract

Energy levels and emission spectra of $W^{25+}$ ion have been studied by performing the large-scale relativistic configuration interaction calculations. Configuration interaction strength is used to determine the configurations exhibiting the largest influence on the $4f^3$, $4d^{9}4f^4$, $4f^{2}5s$, $4f^{2}5p$, $4f^{2}5d$, $4f^{2}5f$, $4f^{2}5g$, and $4f^{2}6g$ configuration energies. It is shown that correlation effects are crucial for the $4f^{2}5s\to 4f^3$ transition which in single-configuration approach occurs due to the weak electric octupole transitions. As well, the correlation effects affect the $4f^{2}5d\to 4f^3$ transitions by increasing transition probabilities by an order. Corona model has been used to estimate the contribution of various transitions to the emission in a low-density electron beam ion trap (EBIT) plasma. Modeling in 10--30 nm wavelength range produces lines which do not form emission bands and can be observed in EBIT plasma.

26 pages including 8 figures and 3 tables

References in corpus (3)

• Spectra of W${}^{39+}$-W${}^{47+}$ in the 12 nm to 20 nm region observed with an EBIT light source
• Theoretical energy level spectra and transition data for 4p${}^6$4d, 4p${}^6$4f and 4p${}^5$4d${}^2$ configurations of W${}^{37+}$ ion
• Theoretical energy level spectra and transition data for 4p${}^6$4d${}^2$, 4p${}^6$4d4f and 4p${}^5$4d${}^3$ configurations of W${}^{36+}$ ion

Cited by in corpus (2)

• Theoretical investigation of spectroscopic properties of W${}^{26+}$ in EBIT plasma
• Cascade emission in electron beam ion trap plasma of W${}^{25+}$ ion