Two answers required. An ion beam of these two nuclear species, typically accelerated into a titanium target, serves as part of “compact neutron generators.” Research at the NBTF in Italy uses negative ions of one of these nuclear species in neutral-beam injectors that target a mixture of these two species. One of these two species is used in radioluminescent powerless lighting systems, and is produced from the other of these species through neutron (*) capture as a byproduct of CANDU (“can-doo”) reactors. The 1991 PTE experiment at JET (“jet”) used an 11/89 mixture of these two species, although an optimal 50/50 mix is assumed in Lawson’s criterion. The rarer of these two species is produced from lithium “breeding blankets” using neutrons produced from the fusion of these two species in designs like ITER (“EE-tur”). For 10 points, what two species used as fuel in modern tokamaks are the isotopes of hydrogen with one and two neutrons? ■END■
ANSWER: deuterium AND tritium [accept H-2 or hydrogen-2 or D in place of “deuterium”; accept H-3 or hydrogen-3 or T in place of “tritium”; accept D–T fusion; prompt on heavy water or D2O in place of “deuterium” by asking “what is the specific isotope?”; prompt on hydrogen in place of either “deuterium” or “tritium” by asking “what is the specific isotope?”]
<TH, Physics>
= Average correct buzz position