Optically Forbidden Transition of A'3Δu ← X3Σg-in Oxygen
ZHU Lin-Fan**, XU Wei-Qing, SUN Jian-Min***, ZHANG Wen-Yao
Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026
Optically Forbidden Transition of A'3Δu ← X3Σg-in Oxygen
ZHU Lin-Fan**, XU Wei-Qing, SUN Jian-Min***, ZHANG Wen-Yao
Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026
摘要The electron energy loss spectra for the valence-shell excitations of oxygen are measured at an incident electron energy of 2500 eV and at scattering angles from 4° to 8.5°. The dipole−forbidden and octupole-allowed transition of the A'3Δu ←X3Σg- is observed from the measured spectra, and it is found that the peak profile of the A'3Δu ←X3Σg− excitation can be well represented by a Gaussin function. The energy position of 6.007±0.008 eV and Franck−Condon linewidth of 1.312±0.020 eV of the A'3Δu ←X3Σg−, which are independent of the scattering condition, have been determined for the first time. The peak profiles of the A'3Δu ←X3Σg− determined in this work provide a possibility to realize the spectral decomposition method of unfolding the Herzberg pseudocontinuum proposed by Campbell ıt et al. [Phys. Rev. A 61 (2000) 022706]
Abstract：The electron energy loss spectra for the valence-shell excitations of oxygen are measured at an incident electron energy of 2500 eV and at scattering angles from 4° to 8.5°. The dipole−forbidden and octupole-allowed transition of the A'3Δu ←X3Σg- is observed from the measured spectra, and it is found that the peak profile of the A'3Δu ←X3Σg− excitation can be well represented by a Gaussin function. The energy position of 6.007±0.008 eV and Franck−Condon linewidth of 1.312±0.020 eV of the A'3Δu ←X3Σg−, which are independent of the scattering condition, have been determined for the first time. The peak profiles of the A'3Δu ←X3Σg− determined in this work provide a possibility to realize the spectral decomposition method of unfolding the Herzberg pseudocontinuum proposed by Campbell ıt et al. [Phys. Rev. A 61 (2000) 022706]
[1] Meriwether J W Jr. 1989 J. Geophys. Res. 94 14629
[2] Nicolet M and Peetermans W 1980 Planet. Space Sci. 28 85
[3] Slanger T G 1994 Science 265 1817
[4] Huber K P and Herzberg G 1979 Molecular Spectra and Molecular Structure (New York: Van Nostrand) vol 4
[5] Chan W F, Cooper G and Brion C E 1993 Chem. Phys. 170 99
[6] Lewis B R, England J P, Gibson S T, Brunger M J and Allan M 2001 Phys. Rev. A 63 022707
[7] Zhu L F, Ren H F, Liu X J, Yuan Z S, Wu Y and Xu K Z 2005 J. Chem. Phys. 122 224303
[8] Herzberg G 1952 Can. J. Phys. 30 185
[9] Herzberg G 1953 Can. J. Phys. 31 657
[10] Wakiya K 1978 J. Phys. B: At. Mol. Opt. Phys. 11 3931
[11] Campbell L, Green M A, Brunger M J, Teubner P J O and Cartwright D C 2000 Phys. Rev. A 61 022706
[12] Shyn T W and Sweeney C J 2000 Phys. Rev. A 62 022711
[13] Green M A, Teubner P J O, Brunger M J, Cartwright D C and Campbell L 2001 J. Phys. B: At. Mol. Opt. Phys. 34 L157
[14] Green M A, Maddern T, Brunger M J, Campbell L, Cartwright D C, Newell W R and Teubner P J O 2002 J. Phys. B: At. Mol. Opt. Phys. 35 3793
[15] Xu K Z, Feng R F, Wu S L, Ji Q, Zhang X J, Zhong Z P and Zheng Y 1996 Phys. Rev. A 53 3081
[16] Liu X J, Zhu L F, Jiang X M, Yuan Z S, Cai B, Chen X J and Xu K Z 2001 Rev. Sci. Instrum. 72 3357
[17] Zhu L F, Cheng H D, Liu X J, Tian P, Yuan Z S, Li W B and Xu K Z 2003 Chin. Phys. Lett. 20 1718
[18] Ge M, Zhu L F, Liu C D and Xu K Z 2008 Chin. Phys. Lett. 25 3646
[19] Jiang W C, Zhu L F and Xu K Z 2008 Chin. Phys. Lett. 25 3649
[20] Inokuti M 1971 Rev. Mod. Phys. 43 297
[21] Liu X J, Zhu L F, Yuan Z S, Li W B, Cheng H D, Sun J M and Xu K Z 2004 J. Electron Spectrosc. Relat. Phenom. 135 15
[22] Cheng H D, Zhu L F, Yuan Z S, Liu X J, Sun J M, Jiang W C and Xu K Z 2005 Phys. Rev. A 72 012715
[23] Zhu L F, Cheng H D, Yuan Z S, Liu X J, Sun J M and Xu K Z 2006 Phys. Rev. A 73 042703
[24] Li W B, Zhu L F, Liu X J, Yuan Z S, Sun J M, Cheng H D, Zhong Z P and Xu K Z 2003 Phys. Rev. A 67 062708
[25] Cartwright D C, Trajmar S, Williams W and Huestis D L 1971 Phys. Rev. Lett. 27 704
[26] Jones D, Campbell L, Bottema M, Teubner P, Cartwright D, Newell W and Brunger M 2006 Planet. Space Sci. 54 45
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