Observation of Ortho-Para {bold H}{sup {bold +}}{sub {bold 3}} Selection Rules in Plasma Chemistry
Journal Article
·
· Physical Review Letters
- Department of Chemistry and Department of Astronomy and Astrophysics, The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
Intensity ratios of infrared spectral lines of ortho- and para-H{sup +}{sub 3} have been measured in hydrogen plasmas using normal and para-H{sub 2}. Large dependences of the intensity ratios on the parent gases have been observed, indicating the spin memory of protons even after chemical reactions. The results clearly demonstrate the existence of selection rules on nuclear spin modifications in chemical reactions theoretically anticipated by M. Quack[Mol.Phys.{bold 34}, 477 (1977)]. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 544355
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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