-4-
UCRL-4505
SOME FISSION PRODUCT YIELDS OF URANIUM BOMBARDED
WITH DEUTERONS OF VARIOUS ENERGIES (20-190 MEV)
Harry G. Hicks, Peter C. Stevenson,
Richard S. Gilbert, and William H. Hutchin
University of California Radiation Laboratory
Livermore Site
May 20, 1955
L INTRODUCTION
Lindner and Osborne! were among the first to study in detail the
manner in which individual fission reactions change with bombarding
particle energy in the hundred-Mev region.
The present work furnishes
additional data about individual fission reactions and serves to provide a
somewhat broader basis for further study of the mechanism of high-energy
fission.“
Natural uranium was bombarded with various energy deuterons
(20-190 Mev) and the following nuclides observed:
pql le Agh!t, and Bal40.
Il
Sr 89,
Zr?!
pq!99,
EXPERIMENTAL PROCEDURE
Targets bombarded using the internal circulating beam of the
Berkeley 184-inch cyclotron were assembled according to the schematic
drawing in Fig. 1.
The aluminum beam monitor and uranium target foils
were sandwiched between guard foils of the same material to protect them
from contamination and to compensate for loss of recoiling radionuclides.
Foils were cut in a special device to produce foils of equal area.
The
monitor and target foils were weighed, assembled, and aligned to ensure
that all foils intercepted the same beam intensity.
Targets were bombarded
tM. Lindner and R. N. Osborne, Phys. Rev. 94,1323 (1954)
Aur, G. Hicks and R. S. Gilbert, U CRL-4506 -
20018b5