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- Preobrajenski, Alexei, et al.
(författare)
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Molecular effects in solid NaNO3 observed by x-ray absorption and resonant Auger spectroscopy
- 2002
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Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 65:20
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Tidskriftsartikel (refereegranskat)abstract
- X-ray absorption and resonant Auger spectroscopy were used to study the formation and decay of nitrogen and oxygen core excitations in ionic-molecular solid NaNO3. It has been shown that the most prominent features in the electronic structure of both valence and conduction bands of the NaNO3 crystal are determined by molecular states of the quasi-isolated NO3- group. In the Auger decay following the strongly localized N 1s-->2a(2)(')(pi) and O 1s-->2a(2)(')(pi) core excitations both spectator and participator signals of extremely high intensity have been found. The nuclear out-of-plane motion inside the NO3- group has been shown to be observable by resonant Auger spectroscopy as a strongly non-Raman dispersion of individual participator features upon tuning the photon energy across the N 1s-->2a(2)(')(pi) and O 1s-->2a(2)(')(pi) resonances. All results on electronic and vibrational properties of NaNO3 are compared with those of the gas-phase BF3 molecule, which is isoelectronic and isostructural to the NO3- group.
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| 2. |
- Preobrajenski, Alexei, et al.
(författare)
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Resonant Auger spectroscopy in solid alkali nitrates as a probe of nuclear motion in the core-excited NO3- anion
- 2003
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Ingår i: Chemical Physics Letters. - 0009-2614. ; 368:1-2, s. 125-131
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Tidskriftsartikel (refereegranskat)abstract
- We investigate the interplay between electronic and nuclear relaxation of the core-excited NO3 anion in solid LiNO3 and NaNO3 by means of the high-resolution X-ray absorption and resonant Auger spectroscopy. It is shown how the relative energy distances between the potential energy surfaces of the intermediate and final states can be mapped using the information on the dispersion of individual participator Auger features upon scanning the photon energy across the resonance. The influence of the cation nature (Li+ or Na+) on the potential surfaces is traced and found to be minimal as a consequence of the rather ionic cation-anion interaction. (C) 2002 Published by Elsevier Science B.V.
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