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21 results on '"Spehr, R."'

1. Concept and Design of the SMART Spectromicroscope at BESSY II

Author

Engel, W., Degenhardt, R., Bradshaw, A. M., Erlebach, W., Ihmann, K., Kuhlenbeck, H., Wichtendahl, R., Freund, H.-J., Schlögl, R., Preikszas, D., Rose, H., Spehr, R., Hartel, P., Lilienkamp, G., Schmidt, Th., Bauer, E., Benner, G., Fink, R., Weiss, M. R., Umbach, E., Thieme, Jürgen, editor, Schmahl, Günter, editor, Rudolph, Dietbert, editor, and Umbach, Eberhard, editor

Published
1998
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11. XPEEM WITH ENERGY-FILTERING: ADVANTAGES AND FIRST RESULTS FROM THE SMART PROJECT

Author

SCHMIDT, TH., primary, GROH, U., additional, FINK, R., additional, UMBACH, E., additional, SCHAFF, O., additional, ENGEL, W., additional, RICHTER, B., additional, KUHLENBECK, H., additional, SCHLÖGL, R., additional, FREUND, H.-J., additional, BRADSHAW, A. M., additional, PREIKSZAS, D., additional, HARTEL, P., additional, SPEHR, R., additional, ROSE, H., additional, LILIENKAMP, G., additional, BAUER, E., additional, and BENNER, G., additional

Published
2002
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12. SMART: An Aberration-Corrected XPEEM/LEEM with Energy Filter

Author

Wichtendahl, R., primary, Fink, R., additional, Kuhlenbeck, H., additional, Preikszas, D., additional, Rose, H., additional, Spehr, R., additional, Hartel, P., additional, Engel, W., additional, Schlögl, R., additional, Freund, H.-J., additional, Bradshaw, A. M., additional, Lilienkamp, G., additional, Schmidt, Th., additional, Bauer, E., additional, Benner, G., additional, and Umbach, E., additional

Published
1998
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13. SMART: a planned ultrahigh-resolution spectromicroscope for BESSY II

Author

Fink, R., primary, Weiss, M.R., additional, Umbach, E., additional, Preikszas, D., additional, Rose, H., additional, Spehr, R., additional, Hartel, P., additional, Engel, W., additional, Degenhardt, R., additional, Wichtendahl, R., additional, Kuhlenbeck, H., additional, Erlebach, W., additional, Ihmann, K., additional, Schlögl, R., additional, Freund, H.-J., additional, Bradshaw, A.M., additional, Lilienkamp, G., additional, Schmidt, Th., additional, Bauer, E., additional, and Benner, G., additional

Published
1997
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15. Calculation of the Lifetimes of Localized Electronic Vacancies in Cyclic Molecules

Author

Spehr, R.

Abstract

For a benzenelike ring of six carbon atoms the dissipation of localized electron vacancies of π and of σ symmetry is calculated. The vacancies are described by Wannier sums. The calculation yields lifetimes of localization of about 10- 16s in both cases. These values are shorter by two orders of magnitude than any period of molecular vibrations. Therefore such transiently localized vacancies, which can be caused by irradiation or by statistical fluctuations, will not destroy any bond in organic molecules.

Published
1980
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