It is possible to use a high energy electron accelerator to transmute Mo-100 to Mo-99 via (e-, n) or (ɤ, n) as cited by Danon, Block and Harvey:
The use of a gamma convertor is shown to provide a higher efficiency than the 30 MeV electrons.
This TRIUMF paper by Thomas Ruth cites using high energy electron cyclotrons to provide the gamma, and lower energy proton cyclotrons for (p, 2n) for Mo-100 to Tc-99m.
So, I expect that the press release was correctly quoted for the high energy electron case.
In the early 1990s I worked on the 10 MeV 50 kW electron IMPELA prototype accelerator at Chalk River ( http://www.iotron.com/impela-technology/impela-accelerators/ ). (100 mA beam current, 5% duty cycle).
After endurance tests we monitored the gamma spectrum from the SS beam stop tank and found Mo-99 and Tc-99m (among other radionuclides). With other supporting evidence our team nuclear physicist determined that the electrons produced gamma, (ɤ, n) on iron provided neutrons that were thermalized in the water filled beam stop and then captured by Mo-98 (24% natural abundance as opposed to only 9.8% for Mo-100). Mo was not a listed in the recipe for the SS so was present only in trace amounts. (The fields at the beam stop surface were only a few mr/h when the accelerator was shut down.) So, it is possible to make tiny amounts of these radionuclides without even trying.
Electron accelerators are a much more forgiving technology than proton accelerators. Electron cyclotrons produce a “continuous” current with values up to hundreds of microamps (the electrons are accelerated across the cyclotron D gaps only in half of the rf phase). The centripetal acceleration of the electrons leads to radiative losses.