I was just wondering if he really meant transmutation...
Beats me. He's writing up a setting with many worlds at TL 19, still others on the cusp of TL 20, and one even at TL 22 but he can't be bothered with the only
Traveller rules set which covers those TLs.
Go figure.
Current transmutation involves smashing stuff together in the hope some of it results in what you want.
I've been to the Chalk River Labs reactor in Canada which makes something like 80% of the medical isotopes used worldwide. It's an absolutely fascinating operation.
If you can manipulate the strong nuclear force then it stands to reason that at high enough TLs and an order of magnitude of four energy higher then manipulation of quarks becomes a thing.
Exactly. Strong force finagling damper technology first appears at TL 12, gets better quickly, and eventually leads to the disintegrator. Considering what the game's damper and disintegrator are suppose to do, manipulating quarks at higher TLs would be the next plausible advance IMHO.
TL 20+ you can add extra nucleons to build the structure you want, you can even turn protons into neutrons or neutrons into protons if the need arises.
IMHO, the damper would already allow you to add nucleons. It can weaken or strengthen the strong nuclear force depending on the position of the nodes and anti-nodes. If you strengthen the strong nuclear force, a given atomic nucleus would be more likely to "capture" a passing neutron or proton.
Much like the NRU core at Chalk River with it's dozens of very specialized capsules containing very specialized compounds precisely located to utilize a certain flux, an element could be placed in a damper's node and then subjected to separate streams of protons and neutrons.
Again, just as at NRU, the questions of just how long the element would be under flux, how strong the flux should be, and all the rest would be relatively simply probability equations. You'd know the element should be exposed to X flux for Y time to create Z percent of the transmuted element you want. After that it's just a matter of separating what you want from the remaining of the material by centrifuges, gravitics, chemical means, etc.
Of course, whether this would economical is a completely different question.