THE RESONANCE INTEGRAL OF ZIRCONIUM (～1% HAFNIUM), THE SLOWING DOWN LENGTH IN A MIXTURE (4：1 BY VOLUME) OF LIGHT WATER AND ZIRCONIUM METAL

摘要

Measurements hare been made of the resonance integral for zirconium (~1％ hafnium) and the slowing down distribution in zirconium (~1％ hafnium) light water mixture containing 20.4％ zirconium by volume. The resonance integral was measured in the energy range from Ra-a-Be neutrons to indium resonance. The slowing down distribution was measured to indium resonance using a fission source of neutrons. The value of the resonance integral is 23.9 cm2, the major part of which is probably due to the hafnium impurity. The mean square slowing down length r2 =213.97 cm and T= 35.7 cm2.