Indeed, LOL!!! ; – ))
Been leafing through my optoelectronic texts. The cut of a si photodiode can be as low as 320nm but the glass will probably attenuate that heavily. I’m thinking the shortest wavelength have got to be of the order of 350nm.
I think I can see some pattern of Fe lines at the extreme left BUT if that’s correct then there is nothing at the usual Ca wavelength. So it would need to be a pure Fe/Ni. Problem with that is I have never seen such diffuse bands before. This is usually the sign of multiple electronic bands overlapping from molecules.
Something to do on the weekend if it’s raining I suppose….