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- J. Reich,
C. Mayer-Böricke,
S. Martin
Institut für Kernphysik der Kernforschungsanlage, Jülich, Germany
- K.L. Brown
Stanford Linear Accelerator Center, Stanford, California, U.S.A.
- F.E. Johnson
Varian Associates, Radiation Division, Palo Alto, California, U.S.A.
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