FISSION FRAGMENT TRANSFER EFFICIENCY FOR HELIUM JET SYSTEM
Department of Physics and Applied Physics
University of Lowell, Lowell, MA 01854, U.S.A.
A study has been made of the fission fragment transfer efficiency of the helium jet system used in our measurements of delayed neutron energy spectra from fission. X-ray spectra from radioactive progeny of the fission fragments were measured using the helium jet and compared with those using a pneumatic rabbit system. With certain exceptions, a high degree of uniformity of the helium jet transfer efficiency is observed.
KEYWORDS: fission products, He-jet transfer efficiency, characteristic X-rays