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Measurements of Absolute Collisional Cross Sections at Harvard-Smithsonian CfA

Published online by Cambridge University Press:  12 April 2016

J.L. Kohl ,
L.K. Deutsch ,
L.D. Gardner ,
G.P. Lafyatis  and
A.R. Young
J.L. Kohl
Affiliation:
Harvard-Smithsonian Center for Astrophysics Cambridge, MA 02138
L.K. Deutsch
Affiliation:
Harvard-Smithsonian Center for Astrophysics Cambridge, MA 02138
L.D. Gardner
Affiliation:
Harvard-Smithsonian Center for Astrophysics Cambridge, MA 02138
G.P. Lafyatis
Affiliation:
Harvard-Smithsonian Center for Astrophysics Cambridge, MA 02138
A.R. Young
Affiliation:
Harvard-Smithsonian Center for Astrophysics Cambridge, MA 02138

Extract

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The major goal of this research program is to determine, experimentally, accurate absolute cross sections for dielectronic recombination (DR) in multiply and singly charged atomic ions. Our initial measurements of DR in C3+ are designed to provide a “bench mark” cross section for a simple atomic system. The experiment determines energy averaged DR cross sections for a well defined process involving a specific stabilizing transition. The fields in the region where dielectronic recombination occurs can be made small (≅ 0.25 V/cm) in order to minimize the effect of Stark mixing which is expected to enhance the DR process. We are presently adding the capability to apply known mixing fields up to 5 V/cm in the electron-ion interaction region of our apparatus.

Type
Session 6. Poster Papers
Information
International Astronomical Union Colloquium , Volume 86: Eighth International Colloquium on Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas , 1984 , pp. 179 - 182
Copyright
Copyright © Naval Research Laboratory 1984. Publication courtesy of the Naval Research Laboratory, Washington, DC.

References

1. Jacobs, V.L., Davis, J., and Kepple, P.C., Phys. Rev. Lett. 32, 1390 (1976).CrossRefGoogle Scholar
2. McLaughlin, D.J. and Hahn, Y., Phys. Rev. A 27, 1389 (1983).CrossRefGoogle Scholar
3. Lafyatis, G.P. and Kohl, J.L., Bull. Am. Phys. Soc., 24, 1181 (1979).Google Scholar
4. Belie, D.S., Dunn, G.H., Morgan, T.J., Mueller, D.W., and Timmer, C., Phys. Rev. Lett. 31, 339 (1983).Google Scholar
5. Williams, J.F., Phys. Rev. A 29, 2936 (1984).CrossRefGoogle Scholar
6. Dittner, P.F., Dati, S., Miller, P.D., Moak, C.D., Stelson, P.H., Bottcher, C., Dress, W.B., Alton, G.D., Neskovie, N., and Fou, C.M., Phys. Rev. Lett. 51, 31 (1983) .CrossRefGoogle Scholar
7. Mitchell, J.B.A., Ng, C.T., Forand, J.L., Levac, D.P., Mitchell, R.E., Sen, A., Miko, D.B., and McGowan, J.W., Phys. Rev. Lett. 50, 335 (1983).CrossRefGoogle Scholar
8. LaGattuta, K. and Hahn, Y., Phys. Rev. Lett. 51, 558 (1983).CrossRefGoogle Scholar
9. Hahn, Y., NBS Workshop on Atomic Spectra and Collisions in External Fields, Gaithersburg, MD, Oct. 1984.Google Scholar
10. Griffin, D., NBS Workshop on Atomic Spectra and Collisions in External Fields, Gaithersburg, MD, Oct. 1984.Google Scholar