http://www.cnr.it/ontology/cnr/individuo/prodotto/ID167911
Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S (Articolo in rivista)
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- Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
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Vall-llosera, G; Garcia, EM; Kivimaki, A; Rachlew, E; Coreno, M; de Simone, M; Richter, R; Prince, KC (2007)
Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S
in PCCP. Physical chemistry chemical physics (Print)
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- Vall-llosera, G; Garcia, EM; Kivimaki, A; Rachlew, E; Coreno, M; de Simone, M; Richter, R; Prince, KC (literal)
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- Univ Stockholm, AlbaNova Ctr, Dept Phys, Royal Inst Technol, S-10691 Stockholm, Sweden; Lab Nazl TASC, INFM, CNR, I-34012 Trieste, Italy; CNR, IMIP, I-00016 Rome, Italy; Sincrotrone Trieste, I-34012 Trieste, Italy (literal)
- Titolo
- Fluorescence emission from photo-fragments after resonant S 2p excitations in H2S (literal)
- Abstract
- Visible-UV fluorescence emission of gas-phase hydrogen sulfide, H2S, has been studied at the S 2p edge with synchrotron radiation excitation. Dispersed fluorescence measurements in the wavelength range 300 - 900 nm were taken at several photon energies corresponding to the excitations of the S 2p electrons to the unoccupied molecular and Rydberg orbitals. The spectra reveal fluorescence from the H, S, S+, HS and HS+ photo-fragments. H is found to be the strongest emitter at Rydberg excitations, while the emission from S+ is dominant at the molecular resonances and above the S 2p ionization thresholds. The intensities of hydrogen Lyman-alpha (122 nm), Balmer-alpha (656 nm), Balmer-beta (486 nm) transitions as well as the visible-UV total fluorescence yield (300 - 900 nm) and the total ion yield were measured by scanning the photon energy in small steps across the S 2p edge. The different Balmer lines show some sensitivity to the specific core excitations, which is, however, not so strong as that recently observed in the water molecule. (literal)
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