The analytical method proposed by Cranberg and Levin (1969) for the calculation of neutron attenuation and multiple scattering corrections in tubular polythene scatterers was tested and compared with a Monte Carlo program in performing these calculations for samples of different elements at various energies. The analytical method is shown to have some advantages in performing these calculations.
A b s t r , h c t. An idea t o design a new converging collimator for cold neutron time-of-flight measurements is presented. Using this new facility in combination with a neutron time-of-flight spectrometer, we rnay have neutron intensity gain factors about three times that obtained using the conventional straight slit collimators. Expressions for calculating the collimators dimensions as well as the intensity gain and the time resolution broading were presented.
Ein neuer, konvergierender Kollimator fur Flugzeitmessungen mit langsramen Neutronen
I n h a l t s i i b e r s i c h t . Die Idee der Konstruktion eines neuen, konvergierenden Kollimators furFlugzeitmessungen mit langsamen Neutronen wird vorgestellt. Mit diesem neuen Geriit in Kombination mit einem Neutronenflugzeitspektrometer sollte sich ein Intensitiitsgewinn yon drei gegeniiber konventiordlen Anordnungen ergeben. Die Kollimatordimensionen, der Intensitiitsgewinn und die Verbreiterung der Zeitauflosung werden berechnet.
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