Pressure Broadening of Some He I Lines

الملخص EN

Quantum statistical approach is adopted for calculating the spectral line shapes of neutral helium in dense plasmas.

Stark broadening of isolated He I lines 5048 Å (21P−41S), 3889 Å (23S−33P), and 3188Å (23S−43P) is presented.

Based on thermodynamic Green's function, the electronic contribution to the shift and width is considered.

The participation of ions to the line broadening is treated in a quasistatic approximation, by taking both quadratic Stark effect and quadrupole interaction into account.

The calculated shifts and widths are compared with existing data.