skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Distinguishing resonance symmetries with energy-resolved photoion angular distributions from ion-pair formation in O2 following two-photon absorption of a 9.3 eV femtosecond pulse

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/5.0013485· OSTI ID:1638211
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2]
  1. Univ. of California, Berkeley, CA (United States). Graduate Group in Applied Science and Technology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division

We present a combined experimental and theoretical study on the photodissociation dynamics of ion-pair formation in O2 following resonant two-photon absorption of a 9.3 eV femtosecond pulse, where the resulting O+ ions are detected using 3-D momentum imaging. Ion-pair formation states of $$^3\Sigma^-_g$$ and $$^3\Pi_g$$ symmetry are accessed through predissociation of optically dark continuum Rydberg states converging to the B $$^2\Sigma^-_g$$ ionic state, which are resonantly populated via a mixture of both parallel-parallel and parallel-perpendicular two-photon transitions. This mixture is evident in the angular distribution of the dissociation relative to the light polarization, and varies with the kinetic energy release (KER) of the fragmenting ion-pair. The KER-dependent photoion angular distribution reveals the underlying two-photon absorption dynamics involved in the ion-pair production mechanism and indicates the existence of two nearly degenerate continuum resonances possessing different symmetries, which can both decay by coupling to ion-pair states of the same total symmetry through internal conversion.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1638211
Alternate ID(s):
OSTI ID: 1638404
Journal Information:
Journal of Chemical Physics, Vol. 153, Issue 2; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (34)

Mass spectrometric study of ion-pair processes in diatomic molecules: H2, CO, NO and O2 journal August 1971
Molecular-frame photoelectron and electron-frame photoion angular distributions and their interrelation journal January 2007
Ion‐pair states of O 2 journal December 1975
Anisotropies in Angular Distributions of Molecular Dissociation Products journal January 1962
Ion pair formation from photon irradiation of O2, NO and CO in 17–30 eV journal March 1980
Doppler line shape of atomic fluorescence excited by molecular photodissociation journal January 1963
Direct mapping of recoil in the ion-pair dissociation of molecular oxygen by a femtosecond depletion method journal December 2008
Time resolved 3D momentum imaging of ultrafast dynamics by coherent VUV-XUV radiation journal June 2016
Effects of the close approach of potential curves in photoabsorption by diatomic molecules—II. Temperature dependence of the O2 cross section in the region 130–160 nm journal July 1987
High resolution photoionization study of ion-pair formation in H2, HD, and D2  journal January 1975
Molpro: a general-purpose quantum chemistry program package: Molpro
  • Werner, Hans-Joachim; Knowles, Peter J.; Knizia, Gerald
  • Wiley Interdisciplinary Reviews: Computational Molecular Science, Vol. 2, Issue 2 https://doi.org/10.1002/wcms.82
journal July 2011
Velocity Map Imaging Study of the O 2 Ion-Pair Production at 17.499 eV:  Simultaneous Parallel and Perpendicular Transitions journal July 2005
A graphical unitary group approach to study multiplet specific multichannel electron correlation effects in the photoionization of O 2 journal June 1995
AB initio vibrational analysis of the Schumann—Runge bands and the neighboring absorption region of molecular oxygen journal September 1976
Multiplet‐specific multichannel electron‐correlation effects in the photoionization of NO journal June 1996
Ion-pair dissociation dynamics of O 2 in the range 17.2–17.5 eV studied by XUV laser and velocity map imaging method journal August 2013
The role of Rydberg states in photoionization of NO 2 and (NO + , O ) ion pair formation induced by one VUV photon journal July 2013
Time-dependent quantum mechanical study of photodissociation of molecular oxygen in the Schumann–Runge continuum journal January 2000
About strange discrete eigenvalues; Über merkwürdige diskrete Eigenwerte book January 1993
Electron energy dependence of the energy and angular distributions of O from dissociative ion pair formation in O 2 journal April 1974
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Refractive index of alkaline earth halides and its wavelength and temperature derivatives journal January 1980
Separation of high order harmonics with fluoride windows journal January 2009
Electron affinities of the first‐row atoms revisited. Systematic basis sets and wave functions journal May 1992
Universal Gaussian basis sets for an optimum representation of Rydberg and continuum wavefunctions journal July 1989
Competing pre-dissociations of O+2(B̃ 2∑−g) journal December 1981
VUV and XUV reflectance of optically coated mirrors for selection of high harmonics journal January 2016
High resolution study of photoionization processes in O 2 journal June 1975
Ion Pair Formation in Multiphoton Excitation of NO 2 Using Linearly and Circularly Polarized Femtosecond Light Pulses: Kinetic Energy Distribution and Fragment Recoil Anisotropy journal September 2010
Resonance signatures in the body-frame valence photoionization of CF 4 journal January 2018
Measurement of the Intensity-Dependent Atomic Dipole Phase of a High Harmonic by Frequency-Resolved Optical Gating journal April 2002
Pulse Compression of a High-Order Harmonic by Compensating the Atomic Dipole Phase journal September 1999
Positive ion ? negative ion coincidence spectroscopy of O2 and H2 using synchrotron radiation journal September 1993
Recoil anisotropy following multiphoton dissociation via near-resonant intermediate states journal May 2005