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- W1969919885 abstract "Nonperturbative $R$-matrix-with-pseudostates (RMPS) and time-dependent close-coupling (TDCC) methods are used to determine electron-impact-ionization cross sections for the excited states of B, ${mathrm{B}}^{+}$, and ${mathrm{B}}^{2+}$. RMPS calculated cross sections are presented for the $1{s}^{2}2{s}^{2}3l$ and $1{s}^{2}2{s}^{2}4l$ configurations of B, the $1{s}^{2}2s3l$ and $1{s}^{2}2s4l$ configurations of ${mathrm{B}}^{+}$, and the $1{s}^{2}3l$, $1{s}^{2}4l$, and $1{s}^{2}5l$ configurations of ${mathrm{B}}^{2+}$. It is shown that the TDCC-calculated cross sections for the $1{s}^{2}2{s}^{2}3s$ configuration of B, the $1{s}^{2}2s3s$ configuration of ${mathrm{B}}^{+}$, and the $1{s}^{2}3s$ configuration of ${mathrm{B}}^{2+}$ are in reasonable agreement with the RMPS results. Furthermore, $n$ scaling of these nonperturbative cross sections is investigated and a scheme proposed to allow for the extrapolation of electron-impact-ionization cross sections to higher $n$ shells. Two semiempirical ionization cross-section expressions are fitted to the peak of the highest $n$-bundled RMPS cross sections for B, ${mathrm{B}}^{+}$, and ${mathrm{B}}^{2+}$. These are subsequently used for accurate evaluation of the higher $n$-shell ionization cross sections needed to obtain temperature- and density-dependent generalized collisional-radiative ionization coefficients for the impurity and transport modeling of magnetic fusion plasmas." @default.
- W1969919885 created "2016-06-24" @default.
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- W1969919885 date "2010-10-29" @default.
- W1969919885 modified "2023-10-02" @default.
- W1969919885 title "Electron-impact-ionization cross sections for excited states ofBq+(q=0–2) and an investigation intonscaling of ionization cross sections" @default.
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- W1969919885 doi "https://doi.org/10.1103/physreva.82.042721" @default.
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