Ion-pair formation in the dissociative recombination of H₃⁺

Abstract

Dissociative recombination of H3+( nu =0) leading to H2++H- has been measured and the results are found to agree with earlier measurements by Peart et al (1979). A discussion is given on the measurement of recombination reactions using beam techniques.

Merged beam measurement of the dissociative recombination of HCN+and HNC+

“…It is not so clear, however, that such an assumption is true for heavier projectiles. In previous experiments of the dissociative recombination and excitation of light ions (H + 2 [17][18][19][20][21], H + 3 [22,23] and D + 3 [24,25]), absolute cross sections were measured which are in good agreement with other experiments performed at lower beam energies. Recent storage ring measurements [26] of recombination cross sections for heavier ions such as N + 2 however, found values larger than ours [27] causing us to have some doubt that the detector was in fact 100% efficient for slower moving heavy dissociation fragments.…”

Associative ionization in collisions of , with and

“…Unfortunately, the size of this effect is difficult to evaluate (see, for instance, the paper by Eerden et al [13]). Nevertheless, this could at least qualitatively explain why the cross sections measured for reactions (2)- (5) are almost identical at the same energy.…”

“…The dissociative recombination of H + 3 and isotopic varieties has been intensively studied both theoretically [3,4] and experimentally [2,[4][5][6][7][8][9]. But the processes leading to the formation of H + 3 are less well documented.…”

Study of the discharge of a multicusp ion source operating with H2and D2

“…There is, however, much uncertainty about the magnitude of the DR rate for H: [U]. It has been reported [16] that for H: the cross section for DR is very dependent on the vibrational state of the H: ion and that at centre of mass energies below about 0.5 eV the DR cross section in D: is lower (by about a factor of two) than that for H: [17].…”