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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:36.27(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:31.79(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

Journal Articles

Double-electron excited singlet and triplet Be-like ions produced by slow He-like ion-atom collisions

Kitazawa, Shinichi; *; *; *; Machida, Shuichi*; *; Wakiya, K.*; *; F.Currel*; *; et al.

Atomic Collision Research in Japan, (24), p.70 - 72, 1998/00

no abstracts in English

Journal Articles

Electron spectra from singlet and triplet states of N$$^{3+}$$(1s$$^{2}$$3l3l',1s$$^{2}$$3l4l') produced by low energy N$$^{5+}$$+He, Ne and Ar collisions

Kitazawa, Shinichi; *; Machida, Shuichi*; Matsui, Y.*; Ida, H.*; *; Wakiya, K.*; *; F.Currell*; *; et al.

Journal of Physics B; Atomic, Molecular and Optical Physics, 31(14), p.3233 - 3243, 1998/00

 Times Cited Count:9 Percentile:48.21(Optics)

no abstracts in English

Journal Articles

Ejected electron spectra from doubly-excited states 1s$$^{2}$$nln'l' of C$$^{2+}$$ ions produced by collisions of C$$^{4+}$$ ions with alkaline-earth atoms

Machida, Shuichi*; *; *; Wakiya, K.*; *; *; *; Kitazawa, Shinichi; Sekiguchi, M.*

Atomic Collision Research in Japan;Progress Report, (23), p.36 - 37, 1997/00

no abstracts in English

Journal Articles

Studies of ejected-electron spectra arising from O$$^{6+}$$-He, Ne, Ar and N$$^{5+}$$-He, Ne, Ar, collisions

Kitazawa, Shinichi; *; *; *; *; Sekiguchi, M.*; *; Wakiya, K.*; Machida, Shuichi*

Phys. Scr., T73, p.207 - 208, 1997/00

 Times Cited Count:1 Percentile:19.53(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Electron spectra from doubly-excited states 1s$$^{2}$$nln´l´ of Be-like ions produced by collisions of O$$^{6+}$$ and C$$^{4+}$$ ions with alkali earth atoms

Machida, Shuichi*; *; *; Wakiya, K.*; *; *; *; *; Kitazawa, Shinichi; Sekiguchi, M.*; et al.

Atomic Collision Research in Japan,No. 22, 0, p.49 - 50, 1996/00

no abstracts in English

Journal Articles

Electron spectra from doublet and quartet states of N$$^{4+}$$(1s3l3l') produced by 60keV N$$^{6+}$$+H$$_{2}$$,O$$_{2}$$ collisions

*; Awaya, Yoko*; F.J.Currell*; Kambara, Tadashi*; Kanai, Yasuyuki*; Kitazawa, Shinichi; *; *; U.I.Safronova*; *; et al.

Journal of Physics B; Atomic, Molecular and Optical Physics, 29, p.1995 - 2006, 1996/00

 Times Cited Count:5 Percentile:36.81(Optics)

no abstracts in English

Journal Articles

Studies of ejected-electron spectra arising from O$$^{6+}$$-He,Ne,Ar and N$$^{5+}$$-He,Ne,Ar collisions

Kitazawa, Shinichi; *; *; Matsui, Y.*; Ida, H.*; *; Wakiya, K.*; Sekiguchi, M.*

Annual Report 1994,Institute for Nuclear Study,University of Tokyo, 0, p.118 - 119, 1995/00

no abstracts in English

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