The angularly resolved O 1 s ion-yield spectrum of O2 revisited

R. Püttner; K. Ueda

doi:10.1063/1.4971240

The angularly resolved O 1 s ion-yield spectrum of O₂ revisited

R. Püttner, K. Ueda

Division of Measurements

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The high-resolution photoabsorption spectrum of O₂ below the O 1sσ-1 ionization threshold has been reanalyzed by using a sophisticated fit approach. For the vibrational substates of the O 1sσu-1(4 u-)3sσg(3 u-) Rydberg state Fano lineshapes are observed indicating an interaction with the O 1sσg-1(4 g-)3σu- (3 u-) core-to-valence excited state. In the angularly resolved ion-yield spectrum recorded at 90° relative to the polarization direction of the synchrotron radiation clear evidence for the O 1sσg-1(2 g-)3σu- (3 u-) and the O 1sσu-1(2 u-)3sσg(3 u-) state was found. This observation clearly suggests thatΛ, the projection of total orbital angular momentum on the molecular axis, is not well separated in the angularly resolved ion-yield spectrum due to a partial breakdown of the axial-recoil approximation for these transitions.

Original language	English
Article number	224302
Journal	Journal of Chemical Physics
Volume	145
Issue number	22
DOIs	https://doi.org/10.1063/1.4971240
Publication status	Published - 2016 Dec 14

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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@article{efe20cbdf68a467a91ee6ee018038893,

title = "The angularly resolved O 1 s ion-yield spectrum of O2 revisited",

abstract = "The high-resolution photoabsorption spectrum of O2 below the O 1sσ-1 ionization threshold has been reanalyzed by using a sophisticated fit approach. For the vibrational substates of the O 1sσu-1(4 u-)3sσg(3 u-) Rydberg state Fano lineshapes are observed indicating an interaction with the O 1sσg-1(4 g-)3σu- (3 u-) core-to-valence excited state. In the angularly resolved ion-yield spectrum recorded at 90° relative to the polarization direction of the synchrotron radiation clear evidence for the O 1sσg-1(2 g-)3σu- (3 u-) and the O 1sσu-1(2 u-)3sσg(3 u-) state was found. This observation clearly suggests thatΛ, the projection of total orbital angular momentum on the molecular axis, is not well separated in the angularly resolved ion-yield spectrum due to a partial breakdown of the axial-recoil approximation for these transitions.",

author = "R. P{\"u}ttner and K. Ueda",

note = "Funding Information: The analysis at the Freie Universit't Berlin was supported by the Deutsche Forschungsgemeinschaft under Project No. PU180/6-1. R.P. gratefully acknowledges fruitful discussions with Professor Dr. N. Schwentner. Publisher Copyright: {\textcopyright} 2016 Author(s).",

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AU - Püttner, R.

AU - Ueda, K.

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PY - 2016/12/14

Y1 - 2016/12/14

N2 - The high-resolution photoabsorption spectrum of O2 below the O 1sσ-1 ionization threshold has been reanalyzed by using a sophisticated fit approach. For the vibrational substates of the O 1sσu-1(4 u-)3sσg(3 u-) Rydberg state Fano lineshapes are observed indicating an interaction with the O 1sσg-1(4 g-)3σu- (3 u-) core-to-valence excited state. In the angularly resolved ion-yield spectrum recorded at 90° relative to the polarization direction of the synchrotron radiation clear evidence for the O 1sσg-1(2 g-)3σu- (3 u-) and the O 1sσu-1(2 u-)3sσg(3 u-) state was found. This observation clearly suggests thatΛ, the projection of total orbital angular momentum on the molecular axis, is not well separated in the angularly resolved ion-yield spectrum due to a partial breakdown of the axial-recoil approximation for these transitions.

AB - The high-resolution photoabsorption spectrum of O2 below the O 1sσ-1 ionization threshold has been reanalyzed by using a sophisticated fit approach. For the vibrational substates of the O 1sσu-1(4 u-)3sσg(3 u-) Rydberg state Fano lineshapes are observed indicating an interaction with the O 1sσg-1(4 g-)3σu- (3 u-) core-to-valence excited state. In the angularly resolved ion-yield spectrum recorded at 90° relative to the polarization direction of the synchrotron radiation clear evidence for the O 1sσg-1(2 g-)3σu- (3 u-) and the O 1sσu-1(2 u-)3sσg(3 u-) state was found. This observation clearly suggests thatΛ, the projection of total orbital angular momentum on the molecular axis, is not well separated in the angularly resolved ion-yield spectrum due to a partial breakdown of the axial-recoil approximation for these transitions.

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