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Saito, Hiroyuki
no journal, ,
no abstracts in English
Tode, Mayumi; Harries, J.; Teraoka, Yuden; Yoshigoe, Akitaka
no journal, ,
Research into the correlation between surface degeneration layer control and hydrogen desorption temperature characteristic of the hydrogen storage materials. The degeneration process was observed by the high-resolution synchrotron radiation X-ray photoelectron spectroscopy. The desorption degree of hydrogen was observed by thermal desorption spectrometry. The experiments were performed at the JAEA soft X-ray beamline BL23SU at SPring-8, using the "SUREAC2000" surface reaction analysis apparatus. Spectra were recorded for two samples(V
Cr
Ti
) covered with native oxide layers, one of which was implanted with deuterium ions. For the un-implanted sample, the oxide layer changes dramatically between 373 K and 473 K, for the deuterium-implanted sample, the change occurs between 473 K and 573 K. The implantation of deuterium leads to a stabilization (of approximately 100 K) of the surface oxide layer.
Kamakura, Nozomu
no journal, ,
Here, the electronic structure of lithium amide LiNH
, which is expected as a candidate for high capacity hydrogen storage materials, is presented. In this study, the electronic structure of insulator lithium amide has been investigated by N 1
soft X-ray emission (XES) and absorption (XAS) spectroscopies. The XES and XAS spectra show a band gap between the valence and conduction bands. The valence bands consist of three peaks, which extend up to 
8 eV from the valence band top. These features are consistent with the calculation. The high binding energy peak in the XES spectrum is attributed to the N 2
state strongly hybridized with H 1 state. The bonding between N and H in the amide ion [NH]
has been discussed in the presentation.