EVIDENCE OF SUPERELASTIC ELECTRON COLLISIONS FROM H2+ STUDIED BY
DISSOCIATIVE
RECOMBINATION IN A COOLER RING

T.Tanabe1, H.Takagi2, I.Katayama3.1, K.Chida1, T.Watanabe1, Y.Arakaki1,
Y.Haruyama4, M.Saito4, I.Nomura5,T.Honma6, K.Noda6, and K.Hosono7

1High Energy Accelerator Research Organization, Tanashi, Tokyo, 188-8501,
Japan
2Physics Laboratory, School of Medicine, Kitasato University, Sagamihara
228-0829, Japan
3Center for Nuclear Study, University of Tokyo, Tanashi, Tokyo, 188-8501,
Japan
4Kyoto Prefectural University, Kyoto, 606-0823, Japan
5National Institute for Fusion Science, Toki 509-5292, Japan
6National Institute of Radiological Sciences, Anagawa, Chiba 263-8555, Japan
7Himeji Institute of Technology, Himeji 671-220, Japan

Vibrational cooling of H2+ by superelastic electron collisions is
demonstrated by
dissociative recombination using an ultracold electron beam from a storage
ring.