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Abstract

The gridded chambers developed at CBNM provide a powerful tool for measurements of fission fragment angle, kinetic energy and mass distributions simultaneously with an angular efficiency close to 4 Pi. They can also serve in measurements where fission neutron spectra are studied as function of these physical quantities. Preliminary tests have been made with a fission chamber loaded with a 252-Cf source of +- 4 x 10**3 .s**-1. The fission neutrons were detected with a 4 inch x 1 inch plastic scintillator and conventional time-of-flight electronics. The coincidence resolution between the neutron detector and the fission chamber was < 2 ns. The neutron detector was placed 2.05 m from the 252-Cf source with a directional normal to the chamber electrodes. The cosines of the angles theta', between this direction and the path of the light fission fragments were determined using the chamber anode and cathode pulses. At higher neutron energies it can be seen, that the neutrons are emitted mainly in the direction of either the light or the heavy fragment, confirming that most of the neutrons are emitted from the fully accelerated fragments.

Additional information

Authors: BUDTZ JOERGENSEN C, JRC GEEL ESTAB. (BELGIUM);KNITTER H H, JRC GEEL ESTAB. (BELGIUM);VOGT R JRC GEEL ESTAB. (BELGIUM), JRC GEEL ESTAB. (BELGIUM)
Bibliographic Reference: IAEA ADVISORY GROUP MEETING ON NUCLEAR STANDARD REFERENCE DATA, GEEL (BELGIUM), NOV. 12-16, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31890 ORA
Availability: Can be ordered online
Record Number: 1989123064300 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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