1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
1 - IAEA Nuclear Data Services
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made with visual techniques. It is however noticeable that<br />
the 1 ^0(n,a) 1 3Q reaction at the same energy, studied with<br />
counter techniques, gives, for the angular distributions, re<br />
sults quite in disagreement with ours. For the first levels<br />
the angular distributions show, in fact, forward asymmetry.<br />
The results will soon be published. The results on the<br />
20 1 ^<br />
Ne(n,2o) C reaction have been published in "Nuovo Cimento"<br />
[5]-<br />
Ericson's fluctuations<br />
Following a first work where we analysed the method of the<br />
maxima counting to determine the correlation width, we have<br />
extended the research to include the effect of the finite<br />
energy resolution. We have then calculated the bias introduced<br />
by various types of experimental resolution (rectangular,<br />
Gaussian, Lorentzian) and presented the coefficients to be<br />
used in the different experimental situations to obtain r<br />
by means of the maxima counting. We have also made a compa<br />
rison of the influence of the finite resolution on the various<br />
methods to determine r . The results have been presented to<br />
LUI S.I.F. Meeting and are in the press f?"].<br />
Montecarlo calculations on the "Blocking" effects in single<br />
crystals<br />
It is known that the angular distribution emitted from a latti<br />
ce centre of a single crystal shows narrow minima in the direc<br />
tion of main crystal strings.<br />
According to a suggestion by Tulinov, this "blocking" effect<br />
of lattice strings could be exploited to measure the lifetime<br />
of highly excited nuclear states produces in nuclear reactions.<br />
In fact, the depth of minimum is expected to decrease with in<br />
creasing distance of the emission point from the lattice centre,<br />
so that the average recoil distance could be deduced from the