1 - IAEA Nuclear Data Services

Use of the PDP-8 computer
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A PDP-8 computer has been used for the analysis of all our mea­
surements. In particular, a Montecarlo code has been figured
out and successfully used for the correction due to multiple
scattering in neutron scattering.
An interface has been constructed in order to use on line the
computer for experiments of neutron physics.
3 (*)
Analysis of the p- He low energy interaction
(L. Drigo and G. Pisent, Nuovo Cimento 51B, 419 (1967))
3
The elastic scattering of protons from He nuclei is analyzed at
the very low energies. A phase shift analysis on the cross
section and polarization data between 2.38 and 4.46 MeV leads
to the determination of four solution sets (see Tables I,II,III).
These mathematical solutions are examined in the light of a
nucleon-nucleus potential model. The structure of the spin-
-dependent interaction which is necessary to assume in order to
reproduce the experiments is widely discussed. Some elements
on the discrimination between phase shift ambiguities are also
given by the potential calculation, but, for a clear-cut conclu­
sion on this point, further high energy analyses, and perhaps
triple scattering experiments will be probably needed.
(*)
Work carried out under Contract EURATOM-CNEN-INFN