Velocity dependence of the penning ionization cross section of D atoms by He (2 1S) and He (2 3S) atoms |
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| Authors: | J Fort JJ Laucagne A Pesnelle G Watel |
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| Institution: | Service de Physique Atomique, Centre d''Etudes Nucléaires de Saclay, 91190 Gif-sur-Yvette, France |
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| Abstract: | Measurements of the Penning ionization cross section, σPI of D atoms by metastable He atoms show that σPI for the reaction He (2 1S) + D is much larger than σPI for He (2 3S) + D. In the relative velocity range νr = (2.3–4.8) × 105 cm/s (0.037–0.163 eV), σPI for He (2 1S) + D collisions was found to vary as νr?0.33. |
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