Model calculations for a 600 angstrom laser based on photopumping of Mo(sup 6+) by a spectral line of Mo(sup 11+)
We assess aspects of the feasibility of a recent proposal to use the coincidence between a Mo (11+), 136.499 angstrom line and a 4p(6 minus) 4p(5) sub 1/2 6s, J = 1, transition of Mo(6+), to obtain amplified spontaneous emission around 600 angstroms. A collisional-radiative model for the Mo(6+) ion, including resonant photoexcitation of the 4p(5) sub 1/2 6s level, was constructed using the HULLAC atomic physics package. The model included the 4s(2); 4p(6); 4p(5) 4d,4f; 4p(5) 5s,5p,5d; 4p(5) 6s,6p,6d; 4s4p(6) 4d,4f; 4p(6) 4d(2) and 4s(2) 4p(4) 4d(2) configurations, amounting to 193 levels. All configuration interactions and collisional mixing was taken into account. A gain of 3 cm (minus 1) is obtained for the 4p(5) 6s(J = 1)--4p(5) 5p(J = 2) transition at 645 angstroms with T sub e = eV, n sub e = 10(18) cm (minus 3), and an effective radiation temperature of T(sub rad) greater than 40 eV for the pump transition. Other transitions exhibit lower gains.
Presented at the 9th International Conference on Vacuum Ultraviolet Radiation Physics
- Pub Date:
- July 1989
- Optical Pumping;
- Line Spectra;
- Lasers and Masers