A flowing &e&low apparatus has been used to measure the cross section for Penning ionization of hvdrogen atoms by helium ZZ3S metastable atoms at thermal energy. The result was found to be 22 I 6'~ lo-l6 cm2 at 300ยฐK, and protons were identified as the major ion product. A novel method employing arg
Crossed beam measurement of the H+ velocity-angle distribution from He*(2 1S) + H penning ionization
โ Scribed by A. Khan; H.R. Siddiqui; D.W. Martin; P.E. Siska
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 565 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Thhe first measurement of a doubly ddferenhal cross scctmn for Penmng loruzatlon 1s reported_ At an energy of 0.33 eV, the protons are scattered sharply forward, and an adchtlonal 0.26 eV IS released as translational energy. A completely ab uutlo prcchctlon compares favorably ~11th these results.
๐ SIMILAR VOLUMES
Penning ionization of He(2%) +HrO and DzO has been studied by observing the A\*A,-a \*B, emission system of HrO+ and DzO+ in a low-pressure flowing afterglow. The vibrational distributions of HrO+ (A) and DrO+(& were consistent with those predicted from Franck-Condon-type vertical excitation. A stro