1 - IAEA Nuclear Data Services

4.3. Partial Cross Sections
- 16 -
S. Cierjacks, P. Forti, D.Kopsch, L. Kropp
Measurements with the fast coincidence apparatus (liquid scintil­
lators) have been completed / 1 / .
The solid state scattering chamber has been equiped with additional
semiconductor telescopes. A, more sophisticated programm was written
which allows the particle assignment and automatic corrections of char­
ged particle time-of-flights during the measurement. By applica­
tions of commercial zero-cross-over circuits (EGG 100 M module
a further improvement of the time resolution was obtained.
A new approach to measure inelastic neutron scattering would be
to use the Karlsruhe cyclotron as the neutron source. Since
this source delivers a continuous neutron spectrum the incoming
neutron energy as well as the>energy of the scattered neutrons must
be deduced from the experiment. Conclusive results can be obtained
either by a double time-of-flight experiment or by a single time-of-
flight experiment using Ge(Li) solid state detectors. In the
latter case the total time-of-flight should be measured simul­
taneously with the V-energy. Evaluating both the pulse height and
the time-of-flight information allows to determine the inital energy
as welD l as the energy of the scattered meutrons. The construction
of suitable detectors is under way. An on-line program which will
be written, which can be used to store the data as a function of
the incident neutron time-of-flight» scattering angle and time-of-
flight after scattering or the pulse height of the Ge(Li) detectors
respectively.