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Christmas Light
’Twas the night before Christmas when all through the house
No electrons were flowing through even my mouse.
All devices were plugged by the chimney with care
With the hope that St. Nikola Tesla would share.
G. S. Sidhu, W. E. Farley, L. F. Hansen, T. Komoto, B. Pohl, C. Wong
Nuclear Science and Engineering | Volume 63 | Number 1 | May 1977 | Pages 48-54
Technical Paper | doi.org/10.13182/NSE77-A27003
Articles are hosted by Taylor and Francis Online.
We have measured the spectra of neutrons and secondary gamma rays emerging from a liquid-nitrogen sphere of 129.3-cm radius with a 14-MeV neutron source at its center. Time-of-flight techniques were used to obtain the detailed data and to minimize background. To compare the measurements with calculations, we folded the detector efficiencies and appropriate experimental parameters into the calculated output of TARTNP, a coupled neutron-photon Monte Carlo transport code utilizing the Lawrence Livermore Laboratory Evaluated Neutron Data Library, September 1975. The calculated neutron spectra show fair agreement with the measurements, and the calculated gamma-ray spectrum is nearly the same as the corresponding measured spectrum. The total biological dose derived from these measurements is in good agreement with the calculations and provides a benchmark for a dose-versus-range curve obtained by TARTNP calculations.