Relativistic calculations of x-ray emission following a Xe-${\mathrm{Bi}}^{83+}$ collision

We study the x-ray emission following the collision of a ${\mathrm{Bi}}^{83+}$ ion with a neutral Xe atom at the projectile energy 70 MeV/u. The collisional and post-collisional processes are treated separately. The probabilities of various many-electron processes at the collision are calculated within a relativistic independent electron model using the coupled-channel approach with atomiclike Dirac-Fock-Sturm orbitals. The analysis of the post-collisional processes resulting in the x-ray emission is based on the fluorescence yields, the radiation, and Auger decay rates, and allows one to derive intensities of the x-ray emission and compare them with experimental data. A reasonable agreement between the theoretical results and the recent experimental data is observed. The role of the relativistic effects is investigated.

Figure 1

The probabilities of the Xe $q$-K-shell-vacancy production in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 2

The probabilities of the Xe $q$-L-shell-vacancy production in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 3

The probabilities of the Bi $q$-K-shell-vacancy surviving in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 4

The probabilities of the Bi $k$-L${}_1$-shell $\left(2s\right)$ electronic population in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 5

The probabilities of the Bi $k$-L${}_2$-shell $\left(2p_{1/2}\right)$ electronic population in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 6

The probabilities of the Bi $k$-L${}_3$-shell $\left(2p_{3/2}\right)$ electronic population in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$.

Figure 7

The intensity $I$ of the Xe K-shell-vacancy production weighted by the impact parameter in the Xe-${\mathrm{Bi}}^{83+}$ collision as a function of the impact parameter $b$. The dotted line indicates the results of the nonrelativistic calculations.

Figure 8

The total and $q$ intensities $I$ of the Xe L-shell-vacancy production weighted by the impact parameter in the Xe-${\mathrm{Bi}}^{83+}$ collision as functions of the impact parameter $b$. The dotted line indicates the total results of the nonrelativistic calculations.

Figure 9

The intensity $I$ of the Bi K${}_{{\alpha }_2}^{{}^{\prime \prime }}$ radiation weighted by the impact parameter in the Xe-${\mathrm{Bi}}^{83+}$ collision as a function of the impact parameter $b$. The dotted line indicates the results of the nonrelativistic calculations.

Figure 10

The intensity $I$ of the Bi K${}_{{\alpha }_2}^{{}^{\prime }}$ radiation weighted by the impact parameter in the Xe-${\mathrm{Bi}}^{83+}$ collision as a function of the impact parameter $b$. The dotted line indicates the results of the nonrelativistic calculations.

Figure 11

The intensity $I$ of the Bi K${}_{{\alpha }_1}$ radiation weighted by the impact parameter in the Xe-${\mathrm{Bi}}^{83+}$ collision as a function of the impact parameter $b$. The dotted line indicates the results of the nonrelativistic calculations.