Nonradiative process induced by external magnetic fields in the C2H2 Ã 1Au state near predissociation limit

✍ Scribed by Haruo Abe; Hisaharu Hayashi

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 601 KB
• Volume: 206
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)85561-2

✦ Synopsis

Fluorescence excitation spectra of the QKb (n= l-4) vibronic bands of the CzHl A state were measured under various magnetic fields up to 10 kG. It was found that external magnetic fields quench fluorescence remarkably from the levels near the predissociation threshold. From the observed vibrational-state, rotational-state, and field-strength dependences of the magnetic quenching, it could be interpreted in terms of the radiationless transition in magnetic fields. The vibrational-energy dependence of the quenching was found to he parallel to that of the Zeeman anticrossing density. The origin of the quenching was briefly discussed in connection with the predissociation.