Electron scattering by ytterbium: I. Excitation of the 4f146s6p 1P1 resonance state and elastic collision
Electron scattering by ytterbium: I. Excitation of the 4f146s6p 1P1 resonance state and elastic collision
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镱的电子散射：I. 4f146s6p 1P1 共振态的激发和弹性碰撞
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. Filipović
中科院分区：
文献类型：
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作者：
B. Predojević;D. Šević;V. Pejčev;B. Marinković;D. Filipović
在入射电子能量为10、20、40、60和80 eV，散射角为2° ~ 150°的条件下，测量了镱原子4f 146 s6 p1 P1共振态的电子碰撞激发微分截面。1 P1态的绝对DCS标度是通过使用前向散射函数方法将其相对DCS归一化到光学振子强度来确定的。在10°和150°之间的θ下，在相同的能量下测量了镱的弹性电子散射的DCS。弹性与非弹性强度比是从能量损失谱中获得的，其总能量分辨率为65 meV（FWHM），角分辨率为1.5°。将非弹性和弹性DCS外推到0°和180°，并进行数值积分，得到积分、动量传递和粘性截面。我们的结果与稀缺的实验和理论数据进行了比较。
Differential cross sections (DCSs) for electron-impact excitation of the 4f146s6p 1P1 resonance state of ytterbium were measured at 10, 20, 40, 60 and 80 eV incident electron energies (E0) and scattering angles (θ) between 2° and 150°. The absolute DCS scale for the 1P1 state was determined through normalization of its relative DCSs to the optical oscillator strength using the forward scattering function method. DCSs for elastic electron scattering by ytterbium were measured at the same energies for θ between 10° and 150°. Elastic-to-inelastic intensity ratios were obtained from energy-loss spectra recorded with overall energy resolution of 65 meV (FWHM) and angular resolution of 1.5°. Both inelastic and elastic DCSs were extrapolated to 0° and 180° and numerically integrated to yield integral, momentum transfer and viscosity cross sections. Our results are compared with scarce experimental and theoretical data.