MODERNIZATION OF SPECTROMETER FOR MEASUREMENTS OF LEAKAGE NEUTRON SPECTRA FROM SPHERICAL SAMPLES WITH THE 14 MeV CENTRAL SOURCE IN THE ENERGY REGION 3-15 MeV

Authors & Affiliations

Onishchuk Yu.N., Leshchenko B.E.
Kiev National University named after Taras Shevchenko, Ukraine

Abstract

On the base of the existed time-of-flight neutron spectrometer the new variant has been carried out. It permits to measure the leakage neutron spectra from spherical samples with the 14 MeV central neutron source in the energy region 3-15 MeV. The flight path has been reduced from 10 to 5 meters in this variant. It allowed to reduce the lower threshold of the neutron registration from 5.7 to 3 MeV with some losses of the energy resolution. The methodical particulars are described. Special attention has been paid to the correct account of the background. It is pointed out that the nongrouped component of the 14 MeV initial neutrons must be taken into consideration in the data processing.

Keywords
TOF neutron spectrometer, neutron spectrum leakage, ungrouped component, lower threshold of detection of neutrons

Article Text (PDF, in Russian)

References

UDC 621.039.512.44

Problems of Atomic Science and Technology. Series: Nuclear Constants", issue 2, 1997