Abstract
Full text: Spectroscopy of atoms and molecules in their metastable states offers the possibility to access excited states otherwise forbidden by dipole selection rules. In the case of molecular oxygen excitation from the metastable O{sub 2}(a{sup 1}{delta}{sub g}) gives access to the singlet manifold of excited states and opens otherwise forbidden ionization channels. Here we present the K-edge resonant Auger spectra of metastable O{sub 2}(a{sup 1}{delta}{sub g}) molecules recorded at high resolution. The metastable molecules have been prepared directly on the inlet line of the spectrometer using a microwave discharge. Although the production yield was {approx} 20% it was possible to separate the metastable molecule decay spectrum excited via the {pi}* {sup 1}{pi} state from the decay of the precursor ground state O{sub 2} molecule proceeding via the triplet excitation. In this way the spectroscopic parameters of the singlet excited state have been obtained. In the same experiment oxygen 1s photoelectron spectra of the metastable molecule were also recorded. The higher photon and photoelectron resolution permitted us to obtain the spectroscopic parameters of the dipole-forbidden {sup 2}{delta} core hole ionic state with higher accuracy compared to our previous study.
Alagia, M;
[1]
INFM-TASC, Trieste;
[2]
Coreno, M;
[3]
De Simone, M;
[4]
Farrokhpour, H;
Tabrizchi, M;
[5]
Isfahn University of Technology (Iran, Islamic Republic of)];
Prince, K C;
[6]
Richter, R;
[6]
Stranges, S
[7]
- CNR-ISMN Sez. Romal, Roma (Italy)
- Italy
- CNR-IMIP Area della Ricerca di Roma (Italy)
- INFM-TASC, Trieste (Italy)
- The Abdus Salam International Centre for Thoretical Physics (Italy)
- Sincrotrone Trieste (Italy)
- Universita di Roma (Italy)
Citation Formats
Alagia, M, INFM-TASC, Trieste, Coreno, M, De Simone, M, Farrokhpour, H, Tabrizchi, M, Isfahn University of Technology (Iran, Islamic Republic of)], Prince, K C, Richter, R, and Stranges, S.
Resonant Auger spectroscopy of metastable molecular oxygen.
Australia: N. p.,
2004.
Web.
Alagia, M, INFM-TASC, Trieste, Coreno, M, De Simone, M, Farrokhpour, H, Tabrizchi, M, Isfahn University of Technology (Iran, Islamic Republic of)], Prince, K C, Richter, R, & Stranges, S.
Resonant Auger spectroscopy of metastable molecular oxygen.
Australia.
Alagia, M, INFM-TASC, Trieste, Coreno, M, De Simone, M, Farrokhpour, H, Tabrizchi, M, Isfahn University of Technology (Iran, Islamic Republic of)], Prince, K C, Richter, R, and Stranges, S.
2004.
"Resonant Auger spectroscopy of metastable molecular oxygen."
Australia.
@misc{etde_20601707,
title = {Resonant Auger spectroscopy of metastable molecular oxygen}
author = {Alagia, M, INFM-TASC, Trieste, Coreno, M, De Simone, M, Farrokhpour, H, Tabrizchi, M, Isfahn University of Technology (Iran, Islamic Republic of)], Prince, K C, Richter, R, and Stranges, S}
abstractNote = {Full text: Spectroscopy of atoms and molecules in their metastable states offers the possibility to access excited states otherwise forbidden by dipole selection rules. In the case of molecular oxygen excitation from the metastable O{sub 2}(a{sup 1}{delta}{sub g}) gives access to the singlet manifold of excited states and opens otherwise forbidden ionization channels. Here we present the K-edge resonant Auger spectra of metastable O{sub 2}(a{sup 1}{delta}{sub g}) molecules recorded at high resolution. The metastable molecules have been prepared directly on the inlet line of the spectrometer using a microwave discharge. Although the production yield was {approx} 20% it was possible to separate the metastable molecule decay spectrum excited via the {pi}* {sup 1}{pi} state from the decay of the precursor ground state O{sub 2} molecule proceeding via the triplet excitation. In this way the spectroscopic parameters of the singlet excited state have been obtained. In the same experiment oxygen 1s photoelectron spectra of the metastable molecule were also recorded. The higher photon and photoelectron resolution permitted us to obtain the spectroscopic parameters of the dipole-forbidden {sup 2}{delta} core hole ionic state with higher accuracy compared to our previous study.}
place = {Australia}
year = {2004}
month = {Jul}
}
title = {Resonant Auger spectroscopy of metastable molecular oxygen}
author = {Alagia, M, INFM-TASC, Trieste, Coreno, M, De Simone, M, Farrokhpour, H, Tabrizchi, M, Isfahn University of Technology (Iran, Islamic Republic of)], Prince, K C, Richter, R, and Stranges, S}
abstractNote = {Full text: Spectroscopy of atoms and molecules in their metastable states offers the possibility to access excited states otherwise forbidden by dipole selection rules. In the case of molecular oxygen excitation from the metastable O{sub 2}(a{sup 1}{delta}{sub g}) gives access to the singlet manifold of excited states and opens otherwise forbidden ionization channels. Here we present the K-edge resonant Auger spectra of metastable O{sub 2}(a{sup 1}{delta}{sub g}) molecules recorded at high resolution. The metastable molecules have been prepared directly on the inlet line of the spectrometer using a microwave discharge. Although the production yield was {approx} 20% it was possible to separate the metastable molecule decay spectrum excited via the {pi}* {sup 1}{pi} state from the decay of the precursor ground state O{sub 2} molecule proceeding via the triplet excitation. In this way the spectroscopic parameters of the singlet excited state have been obtained. In the same experiment oxygen 1s photoelectron spectra of the metastable molecule were also recorded. The higher photon and photoelectron resolution permitted us to obtain the spectroscopic parameters of the dipole-forbidden {sup 2}{delta} core hole ionic state with higher accuracy compared to our previous study.}
place = {Australia}
year = {2004}
month = {Jul}
}