TY - JOUR
T1 - Microscopic ultraviolet photoelectron spectroscopy using He-I and He-II resonance lines
AU - Kondo, Yuzi
AU - Ejima, Takeo
AU - Takatsuka, Hirofumi
AU - Watanabe, Makoto
N1 - Funding Information:
We would like to thank Profs. Y. Fujii and M. Kamada for supplying the CREA. We also thank Mrs. K. Iwabuchi, I. Tanaka and S. Yanagida for fabricating the micro-UPS. We are also grateful to Drs. I. Matsubara and R. Funahashi for preparing the NiWO4 microcrystals. The present work was supported by a Grant-in-Aid for Scienti c Research (A) (2) (Contract No. 09355004) from the Ministry of Education, Science, Sports and Culture and the Reimei Research Resources from the Japan Atomic Energy Research Institute.
PY - 2002/2
Y1 - 2002/2
N2 - A microscopic ultraviolet photoelectron spectrometer (micro-UPS) is developed using a Schwarzschild objective coated with the two-color multilayer which reflects efficiently both He-I (21.2 eV) and He-II (40.8 eV) resonance lines. The spot size by the use of a pinhole of 300 μm diameter is 5 μm, which was measured using the visible light from a Xe lamp. In the present micro-UPS, a pinhole of 2 mm diameter is used to gain sufficient photon intensity, so that the spot size is 25 μm. The valence band spectra of a NiWO4 microcrystal, which cannot be grown in sufficient size, were measured by the present micro-UPS. The origin of atomic orbitals constituting the valence band of NiWO4 was elucidated.
AB - A microscopic ultraviolet photoelectron spectrometer (micro-UPS) is developed using a Schwarzschild objective coated with the two-color multilayer which reflects efficiently both He-I (21.2 eV) and He-II (40.8 eV) resonance lines. The spot size by the use of a pinhole of 300 μm diameter is 5 μm, which was measured using the visible light from a Xe lamp. In the present micro-UPS, a pinhole of 2 mm diameter is used to gain sufficient photon intensity, so that the spot size is 25 μm. The valence band spectra of a NiWO4 microcrystal, which cannot be grown in sufficient size, were measured by the present micro-UPS. The origin of atomic orbitals constituting the valence band of NiWO4 was elucidated.
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U2 - 10.1142/S0218625X02002580
DO - 10.1142/S0218625X02002580
M3 - Article
AN - SCOPUS:0036463033
SN - 0218-625X
VL - 9
SP - 521
EP - 527
JO - Surface Review and Letters
JF - Surface Review and Letters
IS - 1
ER -