Electron impact dissociation of hydrogen molecule. Time-resolved measurements of the Balmer line

✍ Scribed by Keiji Nakashima; Masaharu Taniguchi; Teiichiro Ogawa

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 385 KB
• Volume: 197
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)86024-c

✦ Synopsis

The time-resolved Balmer S line produced in e-H2 collisions was measured to separate H'(4s) from H*( 4p) and H'(4d). The time-resolved excitation function of H'(4s) started to decrease at an electron energy of about 40 eV compared to the excitation function of H*( n= 4). This decrease indicated that a new dissociation process, which did not produce H*(4s), opened at this energy. The translational energy distribution of H"(4s) obtained from the time-resolved Doppler profile had a dip at about 4 eV. This dip indicated that the new dissociation process, which did not produce H*(4s), produced H*(4p) and H'(4d) with a translational energy of about 4 eV. The new dissociation process proceeds through Qz excited states.