Slowing Down Distribution of U235 Fission Neutrons from a Point Source in Light Water

The results of a measurement of the slowing down distribution in water of neutrons from a point fission source to indium resonance energy, 1.458 ev, are given. The second, fourth, sixth, and eighth moments of the measured distribution are calculated and have the values, ${\mathrm{r̄}}^2\text{=184.7\hspace{0.17em}}{\mathrm{cm}}^2$ , ${\mathrm{r̄}}^4{\text{=1.222×10}}^5\hspace{0.17em}{\mathrm{cm}}^4$ , ${\mathrm{r̄}}^6{\text{=2.27×10}}^8\hspace{0.17em}{\mathrm{cm}}^6$ , and ${\mathrm{r̄}}^8{\text{=8.6×10}}^{11}\hspace{0.17em}{\mathrm{cm}}^8$ .