Photodissociation spectroscopy and dynamics of Si4

被引：11

作者：

Hoops, AA

Bise, RT

Choi, HY

Neumark, DM ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 346卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(01)00961-7

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 photodissociation of Si-4 has been investigated using fast beam photofragment translational spectroscopy. The photofragment yield (PFY) spectrum shows features between 21370 and 22220 cm(-1) corresponding to the 1B(1u) --> (X) over tilde (1)A(g) transition that are attributed to multi-photon dissociation. Single-photon dissociation was examined at higher excitation energies ranging from 5.17 to 6.42 eV. The dominant product channel was found to be Si-3 + Si. Experimental photofragment translational energy distributions were modeled by phase space theory (PST), indicating statistical photo dissociation with no exit barrier along the dissociation coordinate. PST modeling yields a dissociation energy of 4.60 +/- 0.15 eV and DeltaH(f,0)(0) (Si-4) = 6.75 +/- 0.24 eV. (C) 2001 Published by Elsevier Science B.V.

引用

页码：89 / 96

页数：8

共 35 条

[11] Electronic absorption spectra of Si-n and Si-n(-) (n=2-4) in neon matrices [J].