Effect of interchannel coupling on the partial and total autoionization widths: Application to the 1s3s3p 4Po and 1s3p2 4P states for Z=2-5, 10.

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We have computed the partial and total widths with interchannel coupling for the 1s3s3p $^{4}$${\mathit{P}}^{\mathit{o}}$ and 1s3${\mathit{p}}^{2}$ $^{4}$P states for Z=2--5 and 10, by solving the corresponding complex matrix equations constructed from square-integrable N-electron functions with numerical and analytic real and complex orbitals. The correlated wave functions are computed by the state-specific method. Oscillator strengths for one- and two-electron transitions from the metastable 1s2s2p $^{4}$${\mathit{P}}^{\mathit{o}}$ state suggest that the states are reachable in ${\mathrm{He}}^{\mathrm{\ensuremath{-}}}$ and in Li directly, (1s3${\mathit{p}}^{2}$ $^{4}$P), or via the 1s2${\mathit{p}}^{2}$ $^{4}$P state (1s3s3p $^{4}$${\mathit{P}}^{\mathit{o}}$). The effect of interchannel coupling on the partial widths in the case of the $^{4}$${\mathit{P}}^{\mathit{o}}$ state is considerable. On the contrary, interchannel coupling has no significant effect on the total widths. This computational result is discussed formally.