Energy transfer kinetics of the np5(n + 1)p excited states of Ne and Kr.

Energy transfer rate constants for Ne(2p(5)3p) and Kr(4p(5)5p) atoms colliding with ground state rare gas atoms (Rg) have been measured. In part, this study is motivated by the possibility of using excited rare gas atoms as the active species in optically pumped laser systems. Rg(np(5)(n + 1)s) metastable states may be produced using low-power electrical discharges. The potential then exits for optical pumping and laser action on the np(5)(n + 1)p ↔ np(5)(n + 1)s transitions. Knowledge of the rate constants for collisional energy transfer and deactivation of the np(5)(n + 1)p states is required to evaluate the laser potential for various Rg + buffer gas combinations. In the present study we have characterized energy transfer processes for Ne (2p(5)3p) + He for the six lowest energy states of the multiplet. Rate constants for state-to-state transfer have been determined. Deactivation of the lowest energy level of Kr (4p(5)5p) by He, Ne, and Kr has also been characterized. Initial results suggest that Kr (4p(5)5p) + Ne mixtures may be the best suited for optically pumped laser applications.

[1]  B. Verhaar,et al.  Collision-induced intramultiplet mixing for Ne/emph>{(2p)5 (3p)}+He : experiments and quantum calculations , 1988 .

[2]  P. Kramer,et al.  A crossed-beam experiment on intramultiplet mixing collisions with short-lived Ne** {(2p)5(3p)} atoms , 1988 .

[3]  I. Kholin,et al.  INVITED PAPER: Penning high-pressure lasers on the 3p --- 3s transitions in neon emitting at 703 and 920 nm , 2003 .

[4]  D. Sealer,et al.  Collisional and Radiative Relaxation of Selected States in Neon I and Argon II , 1971 .

[5]  Verhaar,et al.  Polarization effects in collision-induced intramultiplet mixing for Ne , 1986, Physical review letters.

[6]  R. Chang,et al.  Radiative lifetimes and collisional deactivation rate constants of excited Ne(2p 5 3p) states , 1980 .

[7]  F. Masnou-Seeuws,et al.  Longitudinal alignment transfer between fine-structure levels in Ne*(2p53p) + He collisions. Comparison between cell experiments and quantum calculations , 1999 .

[8]  G. Perram,et al.  A pulsed, optically-pumped rubidium laser at high pump intensity , 2010 .

[9]  S. Davis,et al.  Front Matter: Volume 7581 , 2010 .

[10]  V. K. Kanz,et al.  End-pumped continuous-wave alkali vapor lasers: experiment, model, and power scaling , 2004 .

[11]  M. Shaw,et al.  Excitation transfer in the 2p levels of Ne due to collisions with ground-state He atoms , 1979 .

[12]  N. Djeu,et al.  Optically pumped CW Hg laser at 546.1 nm , 1974 .

[13]  I. Borthwick,et al.  Investigation of the neon 2p collisional excitation transfer processes via CW laser collisionally induced fluorescence , 2001 .

[14]  R. Chang,et al.  Radiative lifetimes and two‐body collisional deactivation rate constants in argon for Kr(4p55p) and Kr(4p55p′) states , 1980 .

[15]  F. Masnou-Seeuws,et al.  Model potential calculations for the excited states of Ne*-He and Ne*-Ne. Application to the interpretation of collision experiments , 1985 .

[16]  J. Grandin,et al.  Transferts de population entre niveaux 2p du néon, par collisions contre atomes de néon a l'état fondamental , 1975 .