TY - JOUR
T1 - Angular distributions of vibrationally-resolved C 1s photoelectrons from fixed-in-space CO molecules
T2 - Vibrational effect in the shape-resonant C 1s photoionization of CO
AU - Adachi, J.
AU - Hosaka, K.
AU - Furuya, S.
AU - Soejima, K.
AU - Takahashi, M.
AU - Yagishita, A.
AU - Semenov, S. K.
AU - Cherepkov, N. A.
N1 - Funding Information:
The experiment has been performed under the approval of the Photon Factory Program Advisory Committee (project No. 02G021). This work has been supported by Grant-in-Aid from Matsuo Foundation, by Grant-in-Aid for Scientific Research (B) 1434016 from Japan Society for the Promotion of Science, and by Grant-in-Aid for Scientific Research on Priority Areas from the MEXT of Japan. N.A.C. and S.K.S. acknowledge the financial support of the DFG-RFBR grant 436 RUS 113/740/0-1R. J.A. is grateful to Prof. A.V. Golovin for checking the manuscript.
PY - 2004/7
Y1 - 2004/7
N2 - We have measured vibrationally-resolved molecular-frame photoelectron angular distributions (MF-PAD) from the C 1s level of CO molecules in the σ shape resonance region. The MF-PAD's for vibrational levels (v f=0, 1, and 2) in the C 1s→εℓσ channel are apparently different one from another at each incident photon energy. These experimental MF-PAD's agree with the present theoretical results from averaging the nuclear distance dependent dipole matrix elements with the relaxed core Hartree-Fock calculations. The results show that the MF-PAD's sensitively depend on the vibrational levels. This means that the internuclear distance dependences of phases and of magnitudes of dipole matrix elements play a crucial role in the C 1s photoionization of CO.
AB - We have measured vibrationally-resolved molecular-frame photoelectron angular distributions (MF-PAD) from the C 1s level of CO molecules in the σ shape resonance region. The MF-PAD's for vibrational levels (v f=0, 1, and 2) in the C 1s→εℓσ channel are apparently different one from another at each incident photon energy. These experimental MF-PAD's agree with the present theoretical results from averaging the nuclear distance dependent dipole matrix elements with the relaxed core Hartree-Fock calculations. The results show that the MF-PAD's sensitively depend on the vibrational levels. This means that the internuclear distance dependences of phases and of magnitudes of dipole matrix elements play a crucial role in the C 1s photoionization of CO.
KW - Core-level photoelectron spectroscopy
KW - Molecular photoionization dynamics
KW - Shape resonance
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U2 - 10.1016/j.elspec.2004.02.043
DO - 10.1016/j.elspec.2004.02.043
M3 - Article
AN - SCOPUS:2942628389
VL - 137-140
SP - 243
EP - 248
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
SN - 0368-2048
IS - SPEC. ISS.
ER -