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Neutron beams generated by protons on berylium

Crocker Nuclear Laboratory, University of California, Davis, California

G. O. Hendry, M.S.E.E. and J. L. Tom, M.S.M.E.

The Cyclotron Corporation, Berkeley, California

W. M. Quarn, M.S.

E. G. & G., Inc., Goleta, California

P. H. Heintz, M.S., Ph.D.

Radiation Oncology Center of Sutter Community Hospitals, Sacramento, California

This excerpt was created in the absence of an abstract.

On May 7 and 8, 1976, we made preliminary measurements to determine certain physical properties of neutron beams produced by protons incident upon lithium and beryllium targets.^* Measurements were made using the 76-inch isochronous cyclotron at the University of California, Davis, at proton energies of 26 MeV, 35 MeV, and 45 MeV. A benelex (pressed wood) collimator, 66 cm long, was employed to define a 10 cm x 10 cm field at 125 cm from the target. The complete results of these measurements will be reported in a forthcoming paper. We believe, however, that the 26 MeV data may be of immediate interest as several cyclotrons capable of producing protons of this energy are in operation.

Received for publication June 1, 1976.