Hydrogen in a graphite-rubidium intercalation compound RbC8 studied by positron annihilation
Hydrogen in a graphite-rubidium intercalation compound RbC8 studied by positron annihilation
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通过正电子湮灭研究石墨铷插层化合物 RbC8 中的氢
DOI：
10.1016/0022-3697(88)90107-2
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发表时间：
1988
影响因子：
4
通讯作者：
H. Inokuchi
中科院分区：
文献类型：
--
作者：
H. Murakami;I. Kanazawa;M. Sano;T. Enoki;H. Inokuchi
测量了300K和373K下RbC8吸氢的正电子湮没辐射的多普勒展宽谱。RbC8的谱由窄分量和宽分量组成。300K的吸氢抑制了窄组分的强度，而373K的吸收使窄组分的强度先减小后增加。从谱线形状的变化来看，300K时RBC[In8]中的氢原子是原子的，373K时是氢化物离子的形式。
Doppler-broadened spectra of positron-annihilation radiation have been measured on RbC8absorbing hydrogen at 300 or 373 K. The spectrum of RbC8was composed of a narrow component and a broad one. The intensity of the narrow component was suppressed through hydrogen absorption at 300 K, while it decreased at first and then increased through the absorption at 373 K. From the change in line-shape of the spectra, the hydrogen accommodated in RbC[in8] is considered to be atomic at 300 K and to be in the form of the hydride ion at 373 K. The spectrum was compared with that calculated for the lattice accommodating hydrogen atoms.