@article{oai:nagoya.repo.nii.ac.jp:00012281,
 author = {Shimizu, Yuta and Inagaki, Makoto and Kumada, Takayuki and Kumagai, Jun},
 issue = {24},
 journal = {THE JOURNAL OF CHEMICAL PHYSICS},
 month = {Jun},
 note = {We performed electron spin resonance studies of trapped electrons and H6^+ radical cations produced by radiolysis of solid parahydrogen (p-H2), p-H2−ortho-D2 (o-D2), and p-H2−HD mixtures. Yields of trapped electrons, H6+ radical cations, and its isotopic analogs H6−nDn+ (4 ≥ n ≥ 1) increased with increasing o-D2 and HD concentrations in solid p-H2. Electrons were found trapped near an o-D2 or an HD in solid p-H2 due to the long-range charge-induced dipole and quadrupole interactions between electrons and isotopic hydrogen molecules. H6^+ radical cations diffuse in solid p-H2 by repetition of H6^++H2→H2+H6^+ and are trapped by ortho-D2 or HD to form H6−nDn+ (4 ≥ n ≥ 1) as isotope condensation reactions. Decay behaviors of these cations by the repetition, isotope condensation, and geminate recombination between electrons and H6−nDn+ (4 ≥ n ≥ 0) were reproduced by determining the corresponding reaction rate constants k1, k2, and k3. Values of 0.045 and 0.0015 L mol^−1 min^−1 were obtained for k1 (H6^++D2→H2+H4D2^+) and k2 (H4D2++D2→H2+H2D4^+), respectively, and the value was quasinull for k3 (H2D4^++D2→H2+D6^+). These rate constants suggest that hole mobility drastically decreased in the repetition reaction when H6+ radical cations acting as hole carriers formed H4D2^+ or H2D4^+. HD and D2 molecules, therefore, act as electron and hole acceptors in irradiated solid p-H2−o-D2 and p-H2−HD mixtures.},
 pages = {244503--244503},
 title = {Negative and positive ion trapping by isotopic molecules in cryocrystals in case of solid parahydrogen containing electrons and H6^+ radical cations},
 volume = {132},
 year = {2010}
}