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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 7
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Phys. Rev. Lett. 94, 076401 (2005) [4 pages]

Two-Photon Spectroscopy of Core Excitons in Barium Fluoride Using Synchrotron Radiation and Laser Light

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Toru Tsujibayashi1,*, Minoru Itoh2, Junpei Azuma3, Masayuki Watanabe4, Osamu Arimoto5, Shunsuke Nakanishi6, Hiroshi Itoh6, and Masao Kamada3
1Department of Physics, Osaka Dental University, 8-1 Kuzuha-hanazono, Hirakata 573-1121, Japan
2Department of Electrical and Electronic Engineering, Shinshu University, Nagano 380-8553, Japan
3Synchrotron Light Application Center, Saga University, Saga 840-8502, Japan
4Department of Interdisciplinary Environment, Kyoto University, Kyoto 606-8501, Japan
5Department of Physics, Okayama University, Okayama 700-8530, Japan
6Department of Advanced Materials Science, Kagawa University, Takamatsu 761-0396, Japan

Received 4 September 2004; revised 22 November 2004; published 23 February 2005

We have conducted two-photon spectroscopy of core excitons in BaF2. Synchrotron radiation and laser light were used for 5p core-electron excitation and Auger-free luminescence was detected as the signal. Two-photon excitation enables access to f and p orbitals that cannot be reached by one-photon excitation of electrons in p orbitals. It has been found that the spin-orbit splittings of 4f and 6p states of the Ba ion in BaF2 are 0.7±0.1 and 1.4±0.1  eV, respectively.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.076401
DOI:
10.1103/PhysRevLett.94.076401
PACS:
71.35.Cc, 71.20.Ps, 78.90.+t

*Electronic address: toru-t@cc.osaka-dent.ac.jp

 
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