Discovered by Marie Curie, published July 1999.
Ciro Santilli often wonders to himself, how much of the natural sciences can one learn in a lifetime? Certainly, a very strong basis, with concrete experimental and physics, chemistry and biology should be attainable to all? How much Ciro manages to learning and teach in those areas is a kind of success metric of Ciro's life.
www-pnp.physics.ox.ac.uk/~barra/teaching.shtml As of 2023, contains some good 2015 materials: web.archive.org/web/20220525094139/http://www-pnp.physics.ox.ac.uk/~barra/teaching.shtml It was called "Subatomic physics" back then.
2015 professor: Alan J. Barr.
Possible 2022 professor: Guy Wilkinson (unconfirmed): www.chch.ox.ac.uk/staff/professor-guy-wilkinson
users.ox.ac.uk/~corp0014/B6-lectures.html gives a syllabus:
- Heat capacity in solids, localised harmonic oscillator models (Dulong-Petit law and Einstein model)
- Heat capacity in solids, a model of sound waves (Debye model)
- A gas of classical charged particles (Drude theory)
- A gas of charged fermions (Sommerfeld theory)
- Bonding
- Microscopic theory of vibrations: the 1D monatomic harmonic chain. Mike Glazer's Chainplot program.
- Microscopic theory of vibrations: the 1D diatomic harmonic chain
- Microscopic theory of electrons in solids: the 1D tight-binding chain
- Geometry of solids: crystal structure in real space. VESTA, 3D visualization program for structural models; an example crystal structure database.
- Geometry of solids: real space and reciprocal space. Reciprocal Space teaching and learning package.
- Reciprocal space and scattering. A fun way to discover the world of crystals and their symmetries through diffraction.
- Scattering experiments II
- Scattering experiments III
- Waves in reciprocal space
- Nearly-free electron model
- Band structure and optical properties
- Dynamics of electrons in bands
- Semiconductor devices. Intel's "A History of Innovation"; Moore's Law; From Sand to Circuits.
- Magnetic properties of atoms
- Collective magnetism. A micromagnetic simulation tool, The Object Oriented MicroMagnetic Framework (OOMMF); OOMMF movies of magnetic domains and domain reversal.
- Mean field theory
Problem set dated 2015: users.ox.ac.uk/~corp0014/B6-materials/B6_Problems.pdf Marked by: A. Ardavan and T. Hesjedal. Some more stuff under: users.ox.ac.uk/~corp0014/B6-materials/
The book is the fully commercial The Oxford Solid State Basics.
The only isotope found on Earth because it occurs as part of the uranium 238 decay chain, i.e., it is not a primordial nuclide.
Interestingly it is a bit less stable than other isotopesL such as Polonium-208 (3 y) and Polonium-209 (124 y), but those aren't in any Earthly radioactive chain so they don't show up on Earth.
A really good option to store educational media such as images and video!
Shame that like the rest of Wikimedia, their interface is so clunky and lacking obvious features.
Gun-type fission weapons are the simplest approach and they work with Uranium-235 bombs as you can ignite it with just one explosion.
But Gun-type fission weapons don't work with plutonium, and weapon grade Plutonium is cheaper than weapon grade Uranium, so it wasn't much used.
Ciro Santilli finds it interesting that radioactive decay basically kickstarted the domain of nuclear physics by essentially providing a natural particle accelerator from a chunk of radioactive element.
The discovery process was particularly interesting, including Henri Becquerel's luck while observing phosphorescence, and Marie Curie's observation that the uranium ore were more radioactive than pure uranium, and must therefore contain other even more radioactive substances, which lead to the discovery of polonium (half-life 138 days) and radium (half-life 1600 years).
The most practical/precise volt standard.
It motivated the definition of the ampere in the 2019 redefinition of the SI base units
The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
Schematic of a typical Josephson voltage standard chip
. Source. 
The evolution of voltage metrology to the latest generation of JVSs by Alain Rüfenacht
. Source. Talk given in 2023. The speaker is from NIST, and the talk was hosted by the BIPM. Fantastic talk.- youtu.be/VoRab8U2eS0?t=354 the desired output voltage is 10V
- youtu.be/VoRab8U2eS0?t=475 lists the three most commonly used 10V implementations currently:
Technical aspects of realizing the DC volt in the laboratory with a JVS by Stéphane Solve
. Source. Talk given in 2023. The speaker is from BIPM, and the talk was hosted by the BIPM. Fantastic talk.- youtu.be/6pgGNJby1lw?t=296 gives the experimental setup used to compare two different references. Notably it involves a nanovoltmeter
This situation is the most bizarre thing ever. The dude was fired in 2020, but he refused to be fired, and because he has the company seal, they can't fire him. He is still going to the office as of 2022. It makes one wonder what are the true political causes for this situation. A big warning sign to all companies tring to setup joint ventures in China!
ARM Fired ARM China’s CEO But He Won’t Go by Asianometry (2021)
Source. Discovered by Marie Curie when she noticed that there was some yet unknown more radioactive element in their raw samples, after uranium and polonium, which she published 6 months prior, had already been separated. Published on December 1989 as: Section "Sur une nouvelle substance fortement radio-active, contenue dans la pechblende".
The uranium 238 decay chain is the main source of naturally occurring radium.
There are unlisted articles, also show them or only show them.