MCNPX characterization of the secondary neutron flux at the Los Alamos Isotope Production Facility

Autor: Eva R. Birnbaum, Kevin D. John, Francois M. Nortier, David A. Reass, Laura E. Wolfsberg, H. Bach, M. A. Connors, Jonathan W. Engle, Michael E. Fassbender, Michael R. James, Charles T. Kelsey, Stepan G. Mashnik
Rok vydání: 2014
Předmět:
Zdroj: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 754:71-82
ISSN: 0168-9002
Popis: The spallation neutron flux produced from proton irradiation of rubidium chloride and gallium targets at the Los Alamos National Laboratory (LANL) Isotope Production Facility (IPF) was investigated using the activation foil technique and computational simulation. Routine irradiations have been found to produce fluxes as high as 1012 n cm−2 s−1, with approximately 50% of the total flux having energy in excess of 1 MeV. Measurements of activation foils are compared with the predicted radionuclide yield using nuclear excitation functions from MCNPX event generators, evaluated nuclear data, and the TALYS nuclear code. Practical application of the secondary neutron flux in the realm of radioisotope production is considered.
Databáze: OpenAIRE