THE DYNAMICS AND ITS POWER DEPENDENCE OF S-1 (B-1(3U)) PYRAZINE STUDIED WITH TRANSFORM-LIMITED NANOSECOND LASER-PULSES

被引：10

作者：

BITTO, H

WILLMOTT, PR

机构：

[1] Physikalisch-Chemisches Institut der Universität Zürich, Ch- 8057 Zürich

来源：

CHEMICAL PHYSICS | 1992年 / 165卷 / 01期

关键词：

D O I：

10.1016/0301-0104(92)80048-Z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The vibrationless S1 (1B3u) state of pyrazine has been investigated by time-resolved spectroscopy with Fourier transform-limited nanosecond laser pulses. The appearance of biexponential fluorescence decays was found to depend strongly on the laser pulse energy between 1.5 and 320-mu-J, corresponding to estimated spectral intensities of 11 and 2200 W/MHz cm2, respectively. The behaviour observed at the lowest pulse energies is discussed in the light of explanations given for the fast emission component in the literature, and agrees best with near resonance Raman scattering/resonance fluorescence of an intermediate level structure. Contradictions in the dynamics apparent in published data are resolved if saturation effects are taken into account.

引用

页码：113 / 121

页数：9

共 30 条

[1] ROTATIONAL EFFECTS ON PYRAZINE S1(B-1(3)U) DYNAMICS .2. ROTATIONAL TEMPERATURE EFFECTS ON EXPERIMENTAL OBSERVABLES FROM A SINGLE ROTATIONAL TRANSITION [J].