TY - JOUR
T1 - Recent progress in the investigation of core hole-induced photon stimulated desorption from adsorbates
T2 - DIET-8: 8th International Workshop on Desorption Induced by Electronic Transitions
AU - Feulner, P.
AU - Romberg, R.
AU - Frigo, S. P.
AU - Weimar, R.
AU - Gsell, M.
AU - Ogurtsov, A.
AU - Menzel, D.
N1 - Funding Information:
We thank the staffs of HASYLAB and BESSY for help during the experiments, in particular T. Möller, C. Nowak, A. Kolmakov, C. Hellwig and C. Jung. We very much thank Norbert Heckmair, who passed away so untimely, for his help. Stimulating discussions with W. Wurth are gratefully acknowledged. This study has been supported by the Deutsche Forschungsgemeinschaft (Projects SFB 338 C10 and Me 266-21/2). S. Frigo acknowledges support by the US Department of Energy, Basic Energy Sciences, Office of Energy Research, under Contract No. W-31-109-ENG-38.
PY - 2000/4/20
Y1 - 2000/4/20
N2 - We report photon stimulated desorption (PSD) of neutral and ionic molecules and atoms from CO chemisorbed on Ru(001) and Cu(111), and from N2 chemisorbed on Ru(001). Comparing branching ratios and spectral features for the O1s and N1s regions, we demonstrate that desorbing neutrals and ions are supplementary probes for the entire region of one- and multi-electron excitations, bearing valuable information on the transfer of energy and charge. For the primary [N1s]π* excitation of N2/Ru(001), we find excitation site-dependent branching into desorption of N20, N0 and N+. PSD of neutral N atoms predominates for excitations of the N atom close to the surface, whereas mainly neutral N2 molecules and N+ ions are ejected for excitations of the outer N atom. At the Ru 3p substrate thresholds we find significant enhancements of the N+ and N2+ yields from N2/Ru(001), and discuss the electronic nature of the underlying energy transfer mechanism.
AB - We report photon stimulated desorption (PSD) of neutral and ionic molecules and atoms from CO chemisorbed on Ru(001) and Cu(111), and from N2 chemisorbed on Ru(001). Comparing branching ratios and spectral features for the O1s and N1s regions, we demonstrate that desorbing neutrals and ions are supplementary probes for the entire region of one- and multi-electron excitations, bearing valuable information on the transfer of energy and charge. For the primary [N1s]π* excitation of N2/Ru(001), we find excitation site-dependent branching into desorption of N20, N0 and N+. PSD of neutral N atoms predominates for excitations of the N atom close to the surface, whereas mainly neutral N2 molecules and N+ ions are ejected for excitations of the outer N atom. At the Ru 3p substrate thresholds we find significant enhancements of the N+ and N2+ yields from N2/Ru(001), and discuss the electronic nature of the underlying energy transfer mechanism.
UR - http://www.scopus.com/inward/record.url?scp=0033742354&partnerID=8YFLogxK
U2 - 10.1016/S0039-6028(00)00006-6
DO - 10.1016/S0039-6028(00)00006-6
M3 - Conference article
AN - SCOPUS:0033742354
SN - 0039-6028
VL - 451
SP - 41
EP - 52
JO - Surface Science
JF - Surface Science
IS - 1
Y2 - 27 September 1999 through 1 October 1999
ER -