Near-resonant rovibronic Raman scattering from 0g+ (bb) valence state via the D0u+ ion-pair state in iodine molecule


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Abstract

Near-resonant Raman scattering from the electronic excited \({I_2}\left( {0_g^ + \left( {bb} \right)\xrightarrow{{hv}}D0_u^ + \to X0_g^ + } \right)\) state via the intermediate ion-pair D0u+ state to the X one is observed for the first time. The Raman scattering follows a laser pulse. Its intensity IR is inversely proportional to the squared value of detuning from the resonant D, 22, 51 ← 0g+(bb), 7, 52 transition, (Δν2)2, according to the theory of near-resonant Raman scattering. The ratio of Raman DX scattering intensity to that of the D0u+, νD = 22, JD = 51 → X0g+ luminescence, IR/IDX < 1.5 × 10–4 for Δν2 > 0.5 cm–1. The Raman and luminescence spectra are found to be identical.

About the authors

V. V. Baturo

Department of Physics

Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034

I. N. Cherepanov

Department of Physics

Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034

S. S. Lukashov

Department of Physics

Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034

A. N. Petrov

Department of Physics; Russian Research Centre Kurchatov Institute

Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034; Gatchina, Leningrad oblast, 188300

S. A. Poretsky

Department of Physics

Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034

A. M. Pravilov

Department of Physics

Author for correspondence.
Email: a.pravilov@spbu.ru
Russian Federation, 7/9 Universitetskaya nab., St. Petersburg, 199034

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