The role of nuclear spin in inelastic Na (3p) + H2 collisions

✍ Scribed by Ricardo R.B. Correia; Goran Pichler; Silvio L. Cunha; Peter Hering

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 380 KB
• Volume: 175
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)80124-v

✦ Synopsis

Using the CARS (coherent am-Stokes Raman spectroscopy) detection technique, we measured the rotational distribution in the a=3 vibrational level of the para-H, modification of the hydrogen molecule after inelastic collision with the Na(3p) atom.

Para-H1 was used in a flowing-regime cell at a temperature of 523 K and at pressures of paraHz ranging from IO to 200 mbar. Our measurements show that the para-H, modification is conserved in inelastic collisions. The conservation of the nuclear spin was also studied at very low hydrogen pressures, where we obtained the non-thermal rotational distribution at the highest attainable vibrational level u= 3.