FISSION FRAGMENT TRANSFER EFFICIENCY FOR HELIUM JET SYSTEM

Gus P. Couchell, David J. Pullen, Walter A. Schier, Paul R. Bennett, Mahmoud H. Haghighi, Eric S. Jacobs and Marcel F. Villani

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