1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
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XVIII o GRUPPO DI RICERCA DEL CONTRATTO EURATOM-CNEN-INFN - ISTITUTO DI<br />
FÍSICA DELL 1 UNIVERSITA', PADOVA (ITALY)<br />
1. Elastic and inelastic scattering of fast neutrons from Ho<br />
(U. Fasoli, P.P. Sambo, D. Toniolo, G. Zago)<br />
A measurement has been performed of angular distribution of ela<br />
stic and inelastic scattering from Ho at the following ener<br />
gies: 3.0, 4.3, 6,0, 7.5 MeV, using the time-of-flight technique.<br />
165<br />
The nuclear temperature of Ho and the level density deduced<br />
from the neutron inelastic scattering are in good agreement with<br />
the statistical model previsions. The analysis of the elastic<br />
scattering is beeing carried out using an optical model which<br />
considers also the nuclear deformation.<br />
23<br />
2. Elastic and inelastic scattering of fast neutrons from Na<br />
(U. Fasoli, P.P. Sambo, D. Toniolo, G. Zago)<br />
23<br />
The elastic and inelastic cross sections of each level of Na<br />
have been measured using the time-of-flight technique at the<br />
energies 1.5» 2.5, 4.0, 6.5 MeV. A complete analysis of the da<br />
ta with the optical model is underway.<br />
3. Total cross section of neutrons on Mg, Cl, K in the energy inter<br />
val 5.0*8.5 MeV<br />
(U. Fasoli, P.P. Sambo, D. Toniolo, G. Zago)<br />
The total cross section of neutrons on Mg, Cl, K has been measured<br />
in the energy interval 5.0*8.5 MeV, with steps of 25 KeV, energy<br />
resolution of about 30 KeV and a statistical error of 1+2%. The<br />
Mg cross section shows strong fluctuations, CI and K cross section<br />
fluctuations are less pronounced.<br />
The Mg cross section has been partially remeasured both with high<br />
er (about 10 KeV) and smaller (about 200 KeV) energy resolution<br />
to study the dependence of the fluctuations amplitude from the<br />
averaging interval.<br />
An analysis of the fluctuations is in progress also from the point<br />
of view of the "intermediate structures".