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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Kokooo, I. Murata, D. Nakano, A. Takahashi, F. Maekawa, Y. Jkeda
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 980-984
Neutronics Experiments and Analysis (Poster Session) | doi.org/10.13182/FST98-A11963740
Articles are hosted by Taylor and Francis Online.
Benchmark experiments on vanadium and vanadium alloy with D-T neutrons have been done at two angles, 0 degrees and 24.9 degrees, using the slab geometry and the time-of-flight (TOF) method. Data were collected for neutron energies ranging from 50 keV to 15 MeV. For vanadium, measurements were made for three slab thicknesses, i.e., 50.8 mm, 1524 mm, and 254 mm, whereas for the vanadium alloy, measurements were made only for 101.6-mm thickness. The measured neutron spectra were compared with MCNP-4A calculations using evaluated nuclear data from the JENDL-3.2, JENDL Fusion-File(IENDL-FF), FENDL/E-1.0 and European Fusion File veraon-3(EFF-3) libraries. The calculated data show reasonable agreement with the measurement, however, some differences are worth noting. Calculations for a slab thickness of 50.8 mm over the energy range from 0.05 to 0.1 MeV underestimate the measurements by about 40% at an angle of 24.9 degrees, while calculations for the energy range from 0.1 to 1.0 MeV, overestimate the measurements by about 40% at an angle of 0 degrees. Calculations made using the JENDL-FF library show good agreement with measurements for energies greater than 11 MeV. Calculations made using the FENDL/E-1.0 library give smaller results than any of the other three libraries in the energy range from 5 to 11 MeV.