Dynamic Stabilization in1σu→1πgExcited Nitrogen Clusters Academic Article uri icon

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abstract

  • High-resolution 1s near-edge spectra of molecular nitrogen and variable size nitrogen clusters obtained using monochromatic synchrotron radiation from the high brilliance BESSY-II storage ring facility are reported. The vibrationally resolved 1sigma(u)-->1pi(g) core-to-valence excitation band of clusters shows a distinct redshift of 6+/-1 meV relative to the isolated molecule, but the vibrational structure and linewidths are essentially unchanged. This shift is assigned to dynamic stabilization of 1sigma(u)-->1pi(g) excited molecules in clusters, arising from the dynamic dipole moment generated by core-hole localization in the low-symmetry cluster field. This leads to changes in intermolecular interactions compared to the ground-state cluster. Such spectral shifts are expected to occur generally in molecular clusters and in the corresponding condensed phase.

authors

  • Flesch, R
  • Pavlychev, AA
  • Neville, JJ
  • Blumberg, J
  • Kuhlmann, M
  • Tappe, W
  • Senf, F
  • Schwarzkopf, O
  • Hitchcock, Adam Percival
  • Rühl, E

publication date

  • April 23, 2001