Non-radiative transitions: Fundamental difficulties of the adiabatic base approach

✍ Scribed by M. Wagner

• Book ID: 104547016
• Publisher: John Wiley and Sons
• Year: 1983
• Tongue: English
• Weight: 552 KB
• Volume: 115
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2221150212

✦ Synopsis

Abstract

The adiabatic base approach is extensively used in literature (“Condon” approximation, “non‐Condon” approximations). Two fundamental difficulties are indicated: (a) for large Huang‐Rhys factors it is not the non‐adiabaticity operator which governs the non‐radiative decay but tunneling; (b) for a small transitive coupling parameter Δ very high potential barriers (with divergent area) are built up as a non‐adiabatic consequence of non‐crossing. A possible way out is shown by suggesting a release of the non‐crossing requirement.