CENTRIFUGAL-DISTORTION ANALYSIS AND STUDY OF T2-RELAXATION FOR L-TYPEDOUBLET TRANSITIONS OF NITROUS-OXIDE (N-15(2)O) BY A MICROWAVE PULSE TECHNIQUE

We investigated l-type doublet transitions of (N2O)-N-15 in the first excited state of the degenerate bending vibration nu2 with 14 less-tha n-or-equal-to J less-than-or-equal-to 34. From analysis of the J-depen dence of the line center frequencies, the doubling constant q(0) was o btained together with the first and second order centrifugal distortio n constants q(1) and q(2), respectively. For the lines in the J band ( 4 to 8.2 GHz) and K-band (18 to 26.5 GHz) we have also investigated th e pressure broadening due to self-collisions with use of the transient emission technique. The experimental results for the pressure broaden ing parameter GAMMA(p) are compared with predictions from binary colli sion theory, based on the modified Murphy-Boggs perturbative treatment .