Anomalous kinetic energies of adsorbed 4He on active carbon fibre (ACF)
Anomalous kinetic energies of adsorbed 4He on active carbon fibre (ACF)
复制标题
活性碳纤维（ACF）上吸附 4He 的反常动能
DOI：
10.1088/0953-8984/11/35/303
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
J. Mayers
中科院分区：
文献类型：
--
作者：
D. Nemirovsky;R. Moreh;K. Andersen;J. Mayers
报道了在亚单层覆盖下，直接测量氦原子吸附在活性碳纤维(ACF)上的动能。采用了利用中子康普顿散射技术的ISIS中子源的电子伏谱仪(EVS)。ACF的比吸附面积为3000m2g-1。在4.6K和10.2K下测量了吸附氦的动量分布，测得平均动能Ks为54.3±3.0K，比假设直径约为0.7 nm的狭缝状气孔和石墨型吸附器上的近单分子层覆盖率估算的动能Ks高30%。
Direct measurements of the kinetic energies of He atoms adsorbed on active carbon fibre (ACF), at submonolayer coverage, are reported. The electronvolt spectrometer (eVs) of the ISIS neutron source, that utilizes the neutron Compton scattering technique, was employed. The specific adsorption area of the ACF was 3000 m2 g-1. The momentum distribution of adsorbed helium was measured at 4.6 K and 10.2 K and the average kinetic energy Ks was found: 54.3±3.0 K. This value is 30% higher than that estimated by assuming slit-shaped pores of dimensions ~0.7 nm together with a nearly monolayer coverage on a graphitic type adsorber.