@article{Arai_Yayama_Kono_2008, place={Харків, Україна}, title={Electron attachment to atomic hydrogen on the surface of liquid 4He: Электроны над жидким гелием}, volume={34}, url={http://fnt.ilt.kharkov.ua/index.php/fnt/article/view/f34-0496e}, DOI={10.1063/1.2911662}, abstractNote={We demonstrate a possibility that helium surface electrons at cryogenic temperatures can be used as a new source of very low energy electrons. Since both electrons (e-) and hydrogen atoms (H) are bound on liquid helium surface, two-dimensional mixture gas of these two species is available on the surface. We found that low energy collision of e- and H drives electron attachment to form a negative hydrogen ion (H-) in the mixture. From our temperature dependence measurement of the reaction rate, it was found that another H atom participate in the reaction. Namely, the reaction is expressed as H + H + e- + H- + H. Possible reaction mechanisms are discussed in terms of direct three-body process and dissociative attachment process. Measurements in applied magnetic field (B) show that the reaction rate coefficient is suppressed as ~ B-2. This implies that electron spin singlet collision is relevant for electron attachment.}, number={4-5}, journal={ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР}, author={Arai, Toshikazu and Yayama, Hideki and Kono, Kimitoshi}, year={2008}, month={Бер}, pages={496–503} }