For nuclear weapons you need a certain level of isotope purity of either plutonium-239 or uranium-235.
And the easiest way by far to achieve this purity is to produce plutonium-239 in a breeder reactor, which allows you to get it out with much cheaper chemical processes rather than costly isotope separation methods.
Atomic Physics - An Historical Approach
. Source. By the British Department of Energy. Possibly: www.acmi.net.au/works/114589--atomic-physics-an-historical-approach/ which dates it 1945 - 1947. 4chan backlinks to Ciro Santilli's website by 
Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16These can be incredibly flattering if you only ignore all of their obscure default hatelingo:
- 2024-08-21 boards.4chan.org/g/thread/101996897 to x86 bare metal examples
- boards.4chan.org/g/thread/101567125 archive.ph/pEhoR "Any schizo websites" quick link by anon, but no further comments. Meh. Most of the sites are boring as well, they seem to think that dark background with non white color or lots of content means schizo.
- 2020-09-21 "ITT: weird sites you found by accident" on a comment. archive.vn/wip/Zz7fx (original). See also Section "Why Ciro Santilli refers to himself in the third person"
- 2020-04-30 "Interesting Website thread" on a comment. archive.is/LgDbK (original). See also Section "Why Ciro Santilli refers to himself in the third person"
Aratu Week 2024 Talk by Ciro Santilli: My Best Random Projects by Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-27 Updated 2025-07-16This talk was presented on 24 September 2024 as part of the 2024 Aratu Week, a small online conference by Brazilian hacker interest group Boitatech.
How to contact me: Section "How to contact Ciro Santilli"
Links to this talk:
Self-recorded presentation VOD
. Source. Presentation upload by the organizers
. Source. There are unlisted articles, also show them or only show them.