N_2分子价电子激发的非弹性X射线和电子散射的比较研究
A Comparative Study of the Valence Electronic Excitations of N_2 by Inelastic X-ray and Electron Scattering
摘要：
用非共振非弹性X射线和电子散射方法研究了N_2的束缚态、价电子激发谱。在通常的理论处理中，由两个探针导出的动力学结构因子应该相同。然而，我们发现强烈的分歧以外的偶极散射的限制，即使在高探测能量。这表明了一个意想不到的重要贡献，从核心电子或原子核的探针电子的分子内多次散射。随着目标物质的原子序数的增加，这些效应应逐渐增强。
英文摘要：
Bound state, valence electronic excitation spectra of N_2 are probed by nonresonant inelastic x-ray and electron scattering. Within the usual theoretical treatments, dynamical structure factors derived from the two probes should be identical. However, we find strong disagreements outside the dipole scattering limit, even at high probe energies. This suggests an unexpectedly important contribution from intra-molecular multiple scattering of the probe electron from core electrons or the nucleus. These effects should grow progressively stronger as the atomic number of the target species increases.
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