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Status and benchmarking of the deuteron induced Tritium and Beryllium-7 production cross sections in Lithium

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Abstract

The current status of the experimental and evaluated data for the tritium and beryllium-7 production cross sections of the deuteron induced reaction on the lithium isotopes was studied. The all relevant cross sections measured by activation, charged particle and neutron spectrometry were considered. The evaluated cross sections from the latest versions of the main evaluations ENDF, JEFF, TENDL and FENDL were compared with experimental data. They were additionally validated against the measured 3H and 7Be inventories in the thick lithium target. It was found that new measurements of 6,7,natLi(d,xt) cross sections above 5 MeV and tritium thick target yields up to 40 MeV as well as substantial upgrade of ENDF, JENDL, TENDL and FENDL are urgently needed. Otherwise the use of these evaluations for the assessment of the radioactive inventories in the d-Li neutron sources will deliver substantially wrong results.

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A program has been undertaken for the production, processing, and ; distribution of cyclotron-produced, carrier-free radioisotopes on a world-wide ; basis. Although cyclotron-produced radioisotopes are inherently more expensive ; than reactor-produced radioisotopes, several conditious are enumerated under ; which their use is desirable, and in many cases mandatory. Several new isotopes, ; previously considered difficult to obtain, are now readily available. Procedures ; are detailed for the separation of 17 radioisotopes in carrier-free form: Be/sup ; 7/, Na²², V⁴⁸, Mn⁵², Ga⁶⁷, As⁷⁴, Sr⁸⁵, Y/.sup ; 88/, Cd¹°⁹, In¹¹¹, up 207/. Thick target yields are given for ; production of these radioisotopes from cyclotron irradiations with deuterons of ; 15 Mev energy and with protons of 8, 15, and 20 Mev energies. (auth);
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