-53-
Zn.
In addition, all of the lsotopes under consideration except
Pe” and °° fall on or to the left of the line of beta stability,
suggesting the process of spallation as a possible source of production.
Of course,
their formation by lower energy neutron re-
actions is also possible, although a greater number of elemental
~~ eer we
OTR A eT RPie pate obser gemma Te
Te re ee
precursors would be required.