Accession Number : AD0477918


Title :   RESEARCH ON THE OPACITY OF LOW TEMPERATURE AIR: OSCILLATOR STRENGTHS AND TRANSITION MOMENTS OF BAND SYSTEMS OF N2, O2, AND NO.


Descriptive Note : Final rept. 1 Jul 64-31 Jul 65,


Corporate Author : RESEARCH AND ADVANCED DEVELOPMENT DIV AVCO CORP WILMINGTON MASS


Personal Author(s) : Wentink,Tunis ,Jr. ; Isaacson ,Louis ; Spindler,Robert J.


Report Date : DEC 1965


Pagination or Media Count : 164


Abstract : This report gives new data on molecular bands related to the opacity of air. Experimental work covering the 0.2 to 2.0 micron region and employing radiative lifetime measurements yielded new or confirmatory numbers on several band systems. Other systems explored are discussed. Cascading and resulting interference with deduction of single spontaneous decays, both from the experimental and mathematical aspects, are treated. From the lifetime results oscillator strengths (f-numbers) and electronic transition moments and transition probabilities were deduced. A critical review and compilation of the various formulations for these quantities are presented and recommendations for consistent definitions are urged. Considerable attention was paid to the moment variation over a given band system. Extensive computations employing new machine programs produced new or extended matrices of Franck-Condon factors and r-centroids. Some Morse and RKR potential comparisons are given. Another major machine code for calculation of the transition moment variation is described. (Author)


Descriptors :   (*AIR, OPTICAL PROPERTIES), (*ELECTRON TRANSITIONS, NITROGEN), (*NITROGEN COMPOUNDS, ELECTRON TRANSITIONS), (*BAND SPECTRA, OXYGEN), (*LOW TEMPERATURE, AIR), INFRARED RADIATION, MOLECULAR SPECTROSCOPY, OXIDES, OSCILLATION, COMPUTER PROGRAMMING, MATRICES(MATHEMATICS), ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, INFRARED SPECTRA, ABSORPTION SPECTRA, EMISSIVITY, TABLES(DATA), EXPERIMENTAL DATA, OSCILLATORS


Subject Categories : OPTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE