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Abstract

A twin ionization chamber for fission fragment nd detection is described. The detector permits measurement of the two fission fragment kinetic energies in an advantageous 2x2pi geometry with an energy resolution of <0.5 MeV. The fission fragment emission angle theta with respect to the symmetry axis of the chamber is measured with a resolution in cos theta of <0.05. The fission fragment nuclear charge distributions can be determined and a timing signal can be extracted which allows a determination of the instant of fission with a time jitter of <0.7 ns. A pulse pile-up rejection technique was nd developed which reduces pulse pile-up by more than a factor of 30. The electronic treatment of the chamber pulses and the data handling procedures including several of the necessary corrections are described in detail.

Additional information

Authors: BUDTZ JOERGENSEN C, JRC GEEL ESTAB. (BELGIUM);KNITTER H H, JRC GEEL ESTAB. (BELGIUM);STRAEDE CH, JRC GEEL ESTAB. (BELGIUM);HAMBSCH F J, JRC GEEL ESTAB. (BELGIUM);VOGT R JRC GEEL ESTAB. (BELGIUM), JRC GEEL ESTAB. (BELGIUM)
Bibliographic Reference: NUCLEAR INSTRUMENTS AND METHODS, IN PHYSICS RESEARCH, A VOL. 258 (1987), PP. 209-220
Record Number: 1989126025801 / Last updated on: 1989-01-01
Category: PUBLICATION
Available languages: en
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