Temperature dependence of the Hg*(6 3P1) quenching cross-section for collision with H2 or D2

✍ Scribed by O. Nédélec; M. Giroud

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 473 KB
• Volume: 165
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)87197-y

✦ Synopsis

The quenching cross-sections for collision of Hg( 6 'PI ) with HZ or D2 are measured in the temperature range 300 < T< 700 K. They show a minimum at Tz400 K, suggesting the occurrence of two processes, which may be interpreted using calculated HgH, potential energy curves. These processes depend on the entrance channel. One, from the attractive 'B, state, would dominate at lower relative velocities. The other, from the repulsive OX+ state would dominate at higher kinetic energies. Each one provides both HgH formation and Ha excitation or dissociation. They correspond to the "rapid" and "5low" processes respectively, as observed by selective excitation of HgHz in a beam followed by detection of HgH.