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Journal Articles

Fine dispersion of Pt$$_{4-5}$$ subnanoclusters and Pt single atoms over porous carbon supports and their structural analyses with X-ray absorption spectroscopy

Itoi, Hiroyuki*; Nishihara, Hirotomo*; Kobayashi, Shunsuke*; Ittisanronnachai, S.*; Ishii, Takafumi*; Berenguer, R.*; Ito, Masashi*; Matsumura, Daiju; Kyotani, Takashi*

Journal of Physical Chemistry C, 121(14), p.7892 - 7902, 2017/04

 Times Cited Count:30 Percentile:72.07(Chemistry, Physical)

Journal Articles

Complementary spectroscopy of tin ions using ion and electron beams

Ohashi, Hayato*; Suda, Shintaro*; Tanuma, Hajime*; Fujioka, Shinsuke*; Nishimura, Hiroaki*; Nishihara, Katsunobu*; Kai, Takeshi; Sasaki, Akira; Sakaue, Hiroyuki*; Nakamura, Nobuyuki*; et al.

Journal of Physics; Conference Series, 163, p.012071_1 - 012071_4, 2009/06

 Times Cited Count:7 Percentile:89.27

Extreme ultra-violet (EUV) emission spectra of multiply charged tin ions were measured in the wavelength range of 10-22 nm following charge exchange collisions or the electron impact excitation of tin ions. In charge exchange collisions, we observed both the resonance lines and the emission lines corresponding to the transitions between the excited states. On the other hand, we observed mainly the resonance lines in the electron impact experiments. We can distinguish the resonance lines from other emission lines in the charge exchange spectrum by comparison with the emission lines in the electron impact spectrum.

Journal Articles

X-ray spectra from neon-like tungsten ions in the interaction with electrons

Watanabe, Hirofumi*; Nakamura, Nobuyuki*; Kato, Daiji*; Nakano, Tomohide; Otani, Shunsuke*

Plasma and Fusion Research (Internet), 2, p.027_1 - 027_3, 2007/06

X-ray spectra from highly charged W ions have been observed in the interaction with an electron beam at the energies ranged from 14 to 1.5 keV by using the Tokyo-EBIT. In this energy range, resonant X-ray transitions at around 9 keV are predominantly taken place through dielectronic recombination processes. The measured spectra are compared with the theoretical calculation with HULLAC.

Journal Articles

Electron spectroscopy of doubly excited states in He produced by slow collisions of He$$^{2+}$$ ions with Ba atoms

Iemura, K.*; Otani, Shunsuke*; Suzuki, H.*; Takeda, Junichi*; Machida, Shuichi*; Tanabe, K.*; Takayanagi, Toshinobu*; Wakiya, K.*; Sekiguchi, M.*; Kanai, Yasuyuki*; et al.

Physical Review A, 64(6), p.062709_1 - 062709_14, 2001/12

 Times Cited Count:6 Percentile:35.78(Optics)

We measured ejected electron spectra caused by autoionization of doubly excited states in He atoms; the excited He was made by double electron capture of low-energy He$$^{2+}$$ ions colliding with Ba atoms. Measurements were performed by means of zero degree electron spectroscopy at projectile energies from 40 to 20 keV. Electron spectra due to autoionization from the states He(2lnl) to He+(1s) for n$$geq$$2, and those from He(3lnl) to He$$^+$$(2s or 2p) for n$$geq$$3, were observed. Line peaks in the spectra were identified by comparing observed electron spectra with those of several theoretical calculations. It was found that doubly excited states of relatively high angular momenta such as the D and F terms were conspicuously created in a quite different manner from the cases of the production of doubly excited states by the use of photon, electron, or ion impacts on neutral He atoms. Rydberg states with large n values were observed with high population in both the He(2lnl) and He(3lnl) series.

Journal Articles

Electron spectrra from singlet and triplet states of Ne$$^{6+**}$$ produced by low energy Ne$$^{8+}$$+He, Ne and Ar collisions

Kitazawa, Shinichi; Ida, H.*; Matsui, Y.*; Takayanagi, Toshinobu*; Wakiya, K.*; Iemura, K.*; Otani, Shunsuke*; Suzuki, H.*; Kanai, Yasuyuki*; Safronova, U. I.*

Journal of Physics B; Atomic, Molecular and Optical Physics, 34(16), p.3205 - 3220, 2001/08

 Times Cited Count:5 Percentile:31.42(Optics)

no abstracts in English

Journal Articles

Production of doubly excited He atoms in collisions of He$$^{2+}$$ ions with aklaline-earth atoms

Iemura, K.*; Suzuki, H.*; Otani, Shunsuke*; Takeda, Junichi*; Takayanagi, Toshinobu*; Wakiya, K.*; Sekiguchi, M.*; Kanai, Yasuyuki*; Kitazawa, Shinichi; Tong, X. M.*; et al.

Atomic Collision Research in Japan, No.25, p.42 - 43, 1999/11

no abstracts in English

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