Energy-resolved positron annihilation for molecules

被引：0
|
作者：
Barnes, L.D. [1 ]
Gilbert, S.J. [1 ]
Surko, C.M. [1 ]
机构：
[1] Department of Physics, University of California, San Diego, CA 92093-0319, United States
来源：
| 2003年 / American Physical Society卷 / 67期
关键词：
Binding energy - Molecular dynamics - Molecular vibrations - Molecules - Paraffins;
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摘要：
Detailed measurements of positron annihilation rates for a number of molecules resolved as a function of positron energy are presented. In alkane molecules, these data show large vibrational resonance peaks that are down-shifted from the vibrational mode energies by an among ΔΕ, which increases with molecular size. These observations are consistent with a model by Gribakin that predicts large enhancements of Zeff due to vibrational Feshbach resonances.
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