1 - IAEA Nuclear Data Services

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XXI. CENTRE D»ETUDE DE L'ENERGIE NUCLEAIRE (C .EJ.-S.C.K. ) Mol, Belgium
1. Slow Neutron Spectroscopy
1.1. Crystal Spectrometer
í\ POORTMANS
Two Be single crystals, fabricated by the Metallurgy Department of
CEN, Saclay, have been tested on the neutron diffractometer. One of
the crystals may possibly be \ised as a monochromator but further tests
will be performed after the crystal blank has been out.
The BR2 neutron crystal spectrometer has been used for activation cross
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section measurements of^ Eu in the energy range 0.01 eV - 0.5 eV.
The gamma activities are measured with a single Nal crystal spectro­
meter or a Y-Y coincidence spectrometer consisting of two 4" x 4" Nal
crystals. The neutron flux is measured by activating a thin gold foil.
The data are currently being analysed.
1.2. Resonance Cross Section Analysis
H. CEULEKANS +
Following an extended stay at Columbia University, New York, N.Y., with
the Neutron Velocity Selector group some of the experimental data
on Nd isotopes obtained during the last run will be further analysed.
To this end the computer codes which were used at Columbia have been
adapted to the IBM 360/40 at ACEC, Charleroi, which is used under the
terms of a contract between our institute and this company.
+ on leave of absence from S.C.K. until 1.9.67
* See e.g. the Report WASH-1074 p. 26 or the Pegram Nuclear Physics
Laboratories Progress. Report NYO-GEN-72-132