Main Question or Discussion Point
I wish to verify a couple of assertions. From the NNDC and other references, it appears that the neutron capture cross section of 3H (Tritium) is zero to a first approximation. This holds true for all neutron energies, including cold neutrons. These statements are equivalent to asserting that 4H ("quadrium" !?) does not exist. As a result, all questions about the behavior of putative "quadrium" are not legitimate physics questions. Is this correct?