Studies of E-Beam Pumped Molecular Lasers

Numerical simulation of Ar-N2excitation transfer in flowing afterglow

“…We consider only the reactions involving excited states of N, which may be related to the Nz(A3Zut) metastable level. Among these, only the N2(B3ng) level has been split into U = 0 and U = 1 vibrational states (higher vibrational levels may be neglected), because the quenching rate coefficients of these states appear to be very different [19]. Such a splitting of the N2(C311u) state would be less significant because of its short lifetime as compared with that of the B level.…”

“…Nz(A3Zu+) being metastable, its rate of quenching by Ar or N2 is negligible, and the only ways we consider for leaving this state are the so-called 'feed-back' reactions [6,19,201 leading to higher excited states, for which only the global branching ratios are known (we have neglected the E-level whose branching ratio is at most 5% of the total 'feed back' process).…”

“…The rate coefficients for the first four groups of reactions are those of the Stanford Group [19,20], except when they have been modified by later considerations of laser processes [6,12]. As the excitation transfer occurs without remaining electrons, the fifth group of reactions is not used, except to establish the selectivity of this process by comparison with direct excitation of nitrogen in the mixture.…”

<title>Lasers For Thermonuclear Fusion And Their Properties</title>

“…in the e-beam excited rare-gas oxygen mixture, a process not yet firmly established. It has been suggested by Lorents and Huestis [16 ] that a two-step mechanism can be used to explain the Xe, kinetic decay dependence on 0, as well as the similar yields of 0{ £) from various oxygen donors (0,, CO,). Ground state oxygen atoms are first produced hy a dissociation step and are then excited to the 0( S) state by collision * with a rare gas excimer (Xe^).…”