Accession Number:

ADA220966

Title:

The Radiative Lifetime of N2(a 1IIg, v=O-2)

Descriptive Note:

Corporate Author:

AIR FORCE SYSTEMS COMMAND HANSCOM AFB MA GEOPHYSICS LAB

Report Date:

1990-04-03

Pagination or Media Count:

8.0

Abstract:

Direct two-photon laser excitation of specific vibrational levels of N2a Pi sub g to measure the lifetime of this state. Direct observation of emission from the a 1 Pi sub g - X 1 Sigma sub g transition in a large cell was employed to follow fluorescence decays. Experiments were conducted to verify that the effects of collisional transfer and diffusion were not contributing to the observed lifetime. Our experiments showed that the radiative lifetime of vibrational levels 0-2 is 56 or - 4 microsecs and is independent of vibrational level, within experimental error. The observed lifetimes are in good agreement with recently reported theoretical calculations. Reprints.

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE