Do all gamma rays have the same energy during a given nuclear reaction? by 
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16The following cobalt-60 diagrams suggest that some lines are clearly visible in specific nuclear reactions:
Also this one:
Alpha particles have low penetration depth by Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16They are stopped by:Therefore, alpha emitters are not too dangerous unless ingested.
Comptes rendus de l'Académie des Sciences Tome 127 by Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16This one contains a PDF with OCR: archive.org/details/ComptesRendusAcademieDesSciences0127/page/n5/mode/2up
Gun-type fission weapons don't work with plutonium by Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16Gun-type fission weapons don't work with Plutonium-239 because of the presence of Plutonium-240 as an impurity which leads to fizzle.
Good mentions at: youtu.be/dgBDvnqMkT4?t=252
Gamma spectroscopy of a Uranium ore
. Source. Several points of the Uranium 238 decay chain are clearly visible.
A nuclear reactor made to produce specific isotopes rather than just consume fissile material to produce electrical power. The most notably application being to produce Plutonium-239 for nuclear weapons from Uranium-238 being irradiated from Uranium-235-created fission.
Tome of the Comptes rendus de l'Académie des Sciences by Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16 Weapon grade Plutonium is cheaper than weapon grade Uranium by Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16
Ciro Santilli 37 Created 2024-08-14 Updated 2025-07-16Because you can generate plutonium-239 from uranium-238 in a breeder reactor, and then separate the plutonium-239 from the Uranium simply by using chemistry methods because you've created an element with different valence electrons.
Isn't it somewhat funny that it is easier to purify a synthetic element than a naturally occurring one?
This isotope shows up as an inevitable contaminant in Plutonium-239 for nuclear weapons, because it emits neutrons too fast and makes it harder to assemble the critical mass without fizzle.
It is the presence of this contaminant that made implosion-type fission weapon a necessity: Section "Gun-type fission weapons don't work with plutonium".
Plutonium-240 is a contaminant.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 3. Visual Studio Code extension installation.
Figure 4. Visual Studio Code extension tree navigation.
Figure 5. Web editor. You can also edit articles on the Web editor without installing anything locally.Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.Video 4. OurBigBook Visual Studio Code extension editing and navigation demo. Source. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact