On Sunday, December 6, 2020, 04:19:13 PM PST, grarpamp
   <grarpamp@gmail.com> wrote:

   Yet another interesting potential application.
   How is the takeup on validation research, test runs, production
   methods, etc?
   I just started informing people associated with the Gallium Nitride LED
   industry a couple of days ago.
   The big companies are Nichia, Osram, Samsung Electronics, and Everlight
   [1]https://www.imarcgroup.com/led-bulb-manufacturing-plant
   The substitution will be quite simple.  Just put in the relevant
   isotope instead of the natural-mix of isotopes.
   >Is isotope separation going to run into nuke centrifuge dual use
   issues?
   Zinc is currently centrifuged in relatively limited quantities for use
   as a corrosion-inhibitor for nuclear reactors.  The problem is (was)
   that the lightest zinc isotope, Zn-64, reacts with a thermal neutron to
   form Zn-65, which emits dangerous gamma rays.  So, decades ago they
   began separating out the Zn-64 from the other zinc isotopes.    I think
   the market for this is about 2 tons per year.  It's called "depleted
   zinc".
   >ie: How will bulk manufacturing of pure glass, silicon, etc be
   different...
   These blue LEDs are made with gallium nitride crystals.  The critical
   issue is the p+ (hole) doping, which has been done using magnesium
   atoms.  The problem is that most magnesium atoms don't create a 'hole',
   but a few do.
   Similarly, Zinc does a weak job because only 4.1% of natural isotope
   zinc is Zn67.  Most are other isotopes.

References

   1. https://www.imarcgroup.com/led-bulb-manufacturing-plant