Accession Number:

ADA056767

Title:

Research Investigation Directed Toward Extending the Useful Range of the Electromagnetic Spectrum.

Descriptive Note:

Interim progress rept. no. 28, 1 Apr 77-31 Mar 78,

Corporate Author:

COLUMBIA RADIATION LAB NEW YORK

Personal Author(s):

• Happer,William

Report Date:

1978-03-31

Pagination or Media Count:

347.0

Abstract:

A method has been developed which provides a complete description of the energy and population distributions in a laser pumped, metastable polyatomic molecule. Different temperatures are required for each mode and for the translationalrotational degrees of freedom. Good agreement between calculated and measured distributions has been found for CH3F. Vibrational energy for this system tends to accumulate preferentially in the nu 3 C-F stretch vibrational mode. As a result, extremely large population inversions are predicted for CH3F when optically pumped by a CO2 laser. These results are expected to apply to many polyatomic molecules.

Descriptors:

• *LASER PUMPING
• *MOLECULAR SPECTROSCOPY
• *ATOMIC SPECTROSCOPY
• INFRARED DETECTION
• OPTICAL RADAR
• HETERODYNING
• PHOTOCHEMICAL REACTIONS
• MOLECULAR VIBRATION
• RAMAN SPECTROSCOPY
• HETEROJUNCTIONS
• CHARGE CARRIERS
• ENERGY TRANSFER
• OPTICAL COMMUNICATIONS
• TRANSPORT PROPERTIES
• QUANTUM EFFICIENCY
• PHOTOIONIZATION
• SCHOTTKY BARRIER DEVICES

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE