1 - IAEA Nuclear Data Services

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VII. REACTOR CENTRUM NEDERLAND, PETTEN (NETHERLANDS)
F.O.M. groups.
1. Nuclear orientation experiments with reactor neutrons.
H. Postma, E.R E.R. Reddingius, J.F.M. Potters , J. Mellema,
and R. Kuiken.
The measurements on the anisotropy of the directional distri­
butions of neutron-capture gamma rays from aligned nuclei
have been extended. For this purpose a 6.5 ce Ge(Li)-detector
has been used. The apparatus is considerably improved by in­
stalling a much larger cryostat and by fully automating the
process of adiabatic demagnetization together with the collec-
IH9 59
tion of data. The isotopes' studied are Sm and Co. Information
about spins of several excited states of Sm and Co
could be obtained from these measurements.
In cooperation with Harwell a study of the anisotropy of fission
235
fragments from aligned U has been started. A preliminary
measurement is in reasonably good agreement with former measure­
ments carried out by J. Dabbs in Oak Ridge.
Publications.
H. Postma and E.R. Reddingius - Directional distribution of
1U3 1^5
neutron itron capture gamma : rays from aligned Nd- and ^Nd nuclei,
Physica 3h 5U1 (196?).
E.R. Reddingius, J.F.M. Potters and H. Postma - A study of gamma
1^3 11+ 5
ray spectra of thermal neutron capture in Nd and Nd; in­
cluding directional anisotropy and linear polarization measure-
ments of such gamma rays from aligned Nd, Physica j$J_ (1967)»
* till 1-8-1967.