Generation of coherent vuv (vacuum ultraviolet) and soft x-rays. Semiannual report No. 1, 1 Aug 1975--31 Jan 1976. [Excitation of strongly forbidden levels by thermal-velocity charge exchange collisions]
During this reporting period three projects have been active. The first project is a study of three frequency summing in inert gases for the generation of short wavelength radiation. The authors have studied both helium and neon systems; they have concluded that the helium experiment is impractical because of the technical difficulties involved in generating the required wavelength. These difficulties are much less severe for the neon system, because of a natural near-coincidence of a neon non-allowed transition and the 16th harmonic of the Nd:YAG laser frequency. The second project resulted in the first observation of a laser induced inelastic collision. In the experiment, energy was switched from the resonant level of strontium to an excited state level of calcium by the application of a short visible laser pulse. The third project describes studies of thermal-velocity charge exchange collisions as a method of selectively exciting strongly forbidden levels of singly ionized column IIA elements, leaving the ground state empty. The authors have successfully demonstrated a charge exchange collisional energy transfer from Mg/sup +/ to the Sr/sup +/ 4d/sup 2/D metastable level. (GRA)
- Research Organization:
- Stanford Univ., Calif. (USA). Center for Materials Research
- DOE Contract Number:
- N00014-75-C-1175
- OSTI ID:
- 7137041
- Report Number(s):
- AD-A-022759; CMR-76-3; ML-2542
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHARGE EXCHANGE
D STATES
ENERGY TRANSFER
EXCITATION
FORBIDDEN TRANSITIONS
MAGNESIUM IONS
ION-ION COLLISIONS
METASTABLE STATES
STRONTIUM IONS
ATOMIC IONS
CHARGED PARTICLES
COLLISIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
ION COLLISIONS
IONS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena