1 - IAEA Nuclear Data Services

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layers have been intercompared and proved to "be satisfactory.
Also the electrosprayed
239
"^Pu-foils are
ready for measurement. With the slow chopper installed
at BR 2 (tangential beam-hole T-7), the definitive
235 10
comparison of o ., of X n,x
U and a of B is started.
Comparison of Spontaneous Fission of
240
Pu and Thermal
Neutron Induced Fission of
' 239
^-Tu
In view of the set-up of similar experiments in the
resonance region (Linac) a measurement is under way
to compare the kinetic energies and mass-distributions
of both fissioning systems - spontaneous fission of
240 239
Pu and thermal neutron induced fission of ^"Tu -
for the study of the influence on these fission parameters
of -the difference in excitation energy of the
same compound nucleus. A computer program was written
to calculate the primary mass distributions and energy
distributions from a two-dimensional experiment on the
coincident fission fragments, registered event by event.
The program was tested for the thermal neutron induced
fission of 2 ^^U.
Miscellaneous
The results of a precise determination of the branching
ratio and Q-value of the B(n,a)'Li reaction and of
the Q-value of the Li(n,