Regarding wavelengths you have enquired, the predicted Bharat radiation would have slightly lower than that of UV in eV level in the case of radioisotopes and XRF sources.
The situation differs in the case of sources that emit X-rays above 14 MeV that would cause mainly visible and NIR radiations. In such a case, the exciting Bharat radiation would have energies higher than visible radiation. You please go through the website mentioned below, and comment once again if possible.
http://www.geocities.com/raomap/discovery4.html
Bharat radiation acts as exciting radiation to valence electron in causing optical radiation detected experimentally.
http://www.geocities.com/raomap/discovery6.html
Tritium emits Bharat radiation but not optical radition as explained in the above website. This would explain why certain blackhole nova emit X-rays alone and not followed by optical radiation.
This work was presented twice in USA, once in Bulgaria, and four times in India. The websites were seen by over 3000 people. So far, no scientist has refuted my claims.
M.A.Padmanabha Rao
raomap@yahoo.com