TY - JOUR
T1 - Effects of molecular rotation in low-energy electron collisions of H 3+
AU - Wolf, Andreas
AU - Kreckel, H.
AU - Lammich, L.
AU - Strasser, D.
AU - Mikosch, J.
AU - Glosík, J.
AU - Plašil, R.
AU - Altevogt, S.
AU - Andrianarijaona, V.
AU - Buhr, H.
AU - Hoffmann, J.
AU - Lestinsky, M.
AU - Nevo, I.
AU - Novotny, S.
AU - Orlov, D. A.
AU - Pedersen, H. B.
AU - Terekhov, A. S.
AU - Toker, J.
AU - Wester, R.
AU - Gerlich, D.
AU - Schwalm, D.
AU - Zajfman, D.
PY - 2006/11/15
Y1 - 2006/11/15
N2 - Measurements on the energetic structure of the dissociative recombination rate coefficient in the millielectronvolt range are described for H 3+ ions produced in the lowest rotational levels by collisional cooling and stored as a fast beam in the magnetic storage ring TSR (Test Storage Ring). The observed resonant structure is consistent with that found previously at the storage ring facility CRYRING in Stockholm, Sweden; theoretical predictions yield good agreement on the overall size of the rate coefficient, but do not reproduce the detailed structure. First studies on the nuclear spin symmetry influencing the lowest level populations show a small effect different from the theoretical predictions. Heating processes in the residual gas and by collisions with energetic electrons, as well as cooling owing to interaction with cold electrons, were observed in long-time storage experiments, using the low-energy dissociative recombination rate coefficient as a probe, and their consistency with the recent cold H3+ measurements is discussed.
AB - Measurements on the energetic structure of the dissociative recombination rate coefficient in the millielectronvolt range are described for H 3+ ions produced in the lowest rotational levels by collisional cooling and stored as a fast beam in the magnetic storage ring TSR (Test Storage Ring). The observed resonant structure is consistent with that found previously at the storage ring facility CRYRING in Stockholm, Sweden; theoretical predictions yield good agreement on the overall size of the rate coefficient, but do not reproduce the detailed structure. First studies on the nuclear spin symmetry influencing the lowest level populations show a small effect different from the theoretical predictions. Heating processes in the residual gas and by collisions with energetic electrons, as well as cooling owing to interaction with cold electrons, were observed in long-time storage experiments, using the low-energy dissociative recombination rate coefficient as a probe, and their consistency with the recent cold H3+ measurements is discussed.
KW - Collisional heating and cooling of rotations
KW - Dissociative recombination
KW - Low-energy resonances
UR - http://www.scopus.com/inward/record.url?scp=33751438620&partnerID=8YFLogxK
U2 - 10.1098/rsta.2006.1881
DO - 10.1098/rsta.2006.1881
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AN - SCOPUS:33751438620
SN - 1364-503X
VL - 364
SP - 2981
EP - 2997
JO - Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
JF - Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
IS - 1848
ER -