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Phys. Rev. A 67, 030703(R) (2003) [4 pages]

K-shell photodetachment from C-: Experiment and theory

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N. D. Gibson1, C. W. Walter1, O. Zatsarinny2, T. W. Gorczyca2, G. D. Ackerman3, J. D. Bozek3, M. Martins4, B. M. McLaughlin5, and N. Berrah2
1Department of Physics and Astronomy, Denison University, Granville, Ohio 43023
2Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008
3Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720
4Institut fuer Experimentalphysik, Universitaet Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
5School of Mathematics and Physics, Queen’s University of Belfast, Belfast BT7 1NN, United Kingdom

Received 19 December 2002; published 25 March 2003

K-shell photodetachment from C- has been investigated in the photon energy range between 280 and 285 eV using the merged ion-beam–photon-beam technique. C- ions were produced using a Cs sputtering negative-ion source, while the photons were produced by the undulator beam line 10.0.1 of the Advanced Light Source. C+ ions formed by double detachment were detected as a function of incident photon energy. Using this collinear arrangement, the relative cross sections were measured and compared with theoretical predictions. The measured spectrum shows the first experimental evidence of the 1s2s22p4(4P) shape resonance near 281.7 eV, which is in excellent agreement with two independent R-matrix calculations for the 1s photodetachment cross section of C- producing C+.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.030703
DOI:
10.1103/PhysRevA.67.030703
PACS:
32.80.Gc
 
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