High resolution spectroscopy of _x000d_ A1b1u ← x1ag 810410 _x000d_ Band of naphthalene referenced to an optical frequency comb

Misono, Masatoshi

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https://hdl.handle.net/2142/91085 Copy

Description

Title

High resolution spectroscopy of _x000d_ A1b1u ← x1ag 810410 _x000d_ Band of naphthalene referenced to an optical frequency comb

Author(s)

Misono, Masatoshi

Contributor(s)

• Nishiyama, Akiko
• Nakashima, Kazuki

Issue Date

2016-06-21

Keyword(s)

Fundamental interest

Abstract

In the excited vibronic states of naphthalene, there exist various interesting interactions such as intramolecular vibrational energy redistribution (IVR), intersystem crossing (ISC), and internal conversion (IC). More than thirty yeas ago, Beck ${\it et}$ ${\it al}$. showed that IVR became remarkable when the excess energy exceeded about 2000 cm$^{-1}$$^,$ $^a$. In the present study, we observe Doppler-free two-photon absorption spectra of $A^1B_{1u} \leftarrow X^1A_g 8^1_04^1_0$ band of naphthalene around 34281 cm$^{-1}$. The excess energy is 2261 cm$^{-1}$, which is just above the threshold of IVR. Thus we expect this band is suitable to analyze the dynamics in the excited vibronic states. In our experiment, the spectral resolution is about 100 kHz, and rovibronic lines are well-resolved. To decide the transition frequencies, frequency shifts, and spectral linewidths with high accuracy and precision, we employed the comb-referenced Doppler-free two-photon absorption spectroscopic system$^b$. We proceed to assign the rovibronic lines in $^qQ$ transition, and to determine molecular constants in the excited vibronic state. $^a$ S. M. Beck, J. B. Hopkins, D. E. Powers, and R. E. Smalley, J. Chem. Phys. {\bf 74}, 43(1981). $^b$ A. Nishiyama, K. Nakashima, A. Matsuba, and M. Misono, J. Mol. Spectrosc. {\bf 318}, 40 (2015).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

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http://hdl.handle.net/2142/91085

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Copyright 2016 by the authors

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