OPTICAL ENERGY TRANSFER PROCESSES
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
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Experimental and analytical investigations have been carried out on photo-excitation and ionization processes in barium and titanium systems. It has been shown that, in order to explain the observed rates of photoionization of barium clouds, photoionization involving barium metastables must be assumed. Population of these metastables can be achieved through an optical pumping process involving resonance absorption from the ground state followed by branching into the metastable levels. A quasi-steady state analysis of this process indicates that an f number of approximately 0.1 is necessary to explain the observed rates of ion production in the barium clouds. Experimental studies using both optical absorption techniques and photo-ionization mass spectrometry indicate this f number to be in the range of 0.01 to 0.1.
- Radiation and Nuclear Chemistry