Binary and ternary recombination of D-3(+) ions with electrons in He-D-2 plasma
Abbreviated Journal Title
Phys. Rev. A
DISSOCIATIVE RECOMBINATION; H-3(+) IONS; AFTERGLOW PLASMA; RYDBERG; STATES; COLLISIONS; HCO+; GAS; INTERSTELLAR; DEPENDENCE; PRESSURE; Optics; Physics, Atomic, Molecular & Chemical
An experimental study is reported about the recombination of D-3(+) ions with electrons in a low-temperature plasma (200-300K) consisting of He with a small admixture of D-2. At several temperatures, the pressure dependence of the apparent binary recombination rate coefficient (alpha(eff)) was measured over a broad range of helium pressures (200-2000 Pa). The binary and ternary recombination rate coefficients were obtained from measured pressure dependences of alpha(eff). The binary recombination rate coefficient obtained alpha(bin)(300 K) = (2.7 +/- 0.9) x 10(-8) cm(3) s(-1) is in agreement with recent theory. The ternary recombination rate coefficient obtained is K-He(300 K) = (1.8 +/- 0.6) x 10(-25) cm(6) s(-1). In analogy with the recently described process of helium-assisted ternary recombination of H-3(+) ions, it is suggested that the ternary helium- assisted recombination of D-3(+) ions proceeds through the formation of a neutral long- lived highly excited Rydberg molecule D-3 followed by a collision with a He atom.
Physical Review A
"Binary and ternary recombination of D-3(+) ions with electrons in He-D-2 plasma" (2009). Faculty Bibliography 2000s. 1578.