Recent content by InkTide

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    I Neutrino-Nucleus Interactions and Half-Life Constraints

    Are the cross sections consistent enough to stay in that ballpark for pretty much any isotope, or is that more like a ballpark of the highest neutrino cross sections (meaning that'd be the highest rate of neutrino collisions you'd get)? One thing I'm very curious about is super-low-energy...
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    I Neutrino-Nucleus Interactions and Half-Life Constraints

    At what half-life duration, if any, does the likelihood of a neutrino collision within a sample of radionuclide atoms exceed the likelihood of a decay event in those atoms over the same time period? Can they be efficiently excluded by their reaction products, or are they meaningfully difficult...
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    A Electron capture in a molecule

    I'm hardly an expert on it but most of what I've read about fluorides suggests that in systems with molar excess of the non-fluorine atom "X" that forms a difluoride or something with even more fluorines, XF>1 + X tends to be more stable than XF (it's something that happens in transition metals...
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    A Electron capture in a molecule

    EC is a bit unique in its susceptibility to chemical properties of the atom, especially for light elements like Beryllium, to the point that ionization can be used to extend the half life by reducing the number of electrons available for capture, up to the extreme of (for isotopes with...
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    B Beta Plus Decay: What's Left for the Electron?

    Ah okay, there's some periodic similarities there - looks like the f-block to d-block, d-block to p-block, and p-block to s-block transitions are disfavored. Notably, that's creating new types of orbitals. It's interesting that the only s-block to s-block jump that creates a new level of...
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    B Exoplanet TOI-4603 b, ~13x Jupiter mass, ~1.04 Jupiter diameter

    Probably true, though I wonder if during the protostar stage it could have accreted that mass. With an F-type subgiant as the parent, there's probably not enough mass between them to hit the limit. Of course, it makes me also wonder if there's a potential new way to make type Ia supernovae that...
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    B Beta Plus Decay: What's Left for the Electron?

    Very helpful, thank you. I guess the follow-on would be how long can the atom stay like that if it's in isolation? How quickly does the rest of the electron cloud shove the excess electron away, since we don't see many single atoms with -1 charge, as far as I'm aware? In more mathematical...
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    B Exoplanet TOI-4603 b, ~13x Jupiter mass, ~1.04 Jupiter diameter

    Obviously, it's clearly an enormous mercury sphere. Joking aside, we can't use element densities very well to estimate structure or interpret element abundances by observed structure. For one thing, the density of the object is going to be at least partially dependent on the bulk modulus of its...
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    B Beta Plus Decay: What's Left for the Electron?

    Specifically, this would be beta plus decay and not electron capture, and assumes an electrically neutral radionuclide. Since beta plus decay is the emission of a positron from the nucleus as a proton transmutes into a neutron, the resulting atom now has 1 less elementary charge than before, but...
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    Exploring Tetrahedral Stacking in Diamond Cubic Arrangements

    In terms of tetrahedral stacking, as occurs in diamond cubic, what I'm describing would be a system with additional tetrahedra in the empty cubes of that figure, but with their vertices on the opposite corners of the cubes that contain them to the "regular" diamond cubic arrangement. Due to the...
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    Can ChatGPT Handle Complex Physics Questions Accurately?

    I don't agree with gendering terms like that, but I definitely agree with the core sentiment. I think we need to be extremely cautious of mistaking the imitation of problem solving for actual problem solving - if the student (AI) is just copying the answer from the textbook (training data), are...
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    Can ChatGPT Handle Complex Physics Questions Accurately?

    The best way I've seen its usual output described is "fluent bullshit". It's bad at coding and math because it is, at its core, a weighted shuffling of components in the training data. From a computer science standpoint I think it's important to recognize that ML models use, from input to...
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    What are the potential consequences of a nuclear war between Russia and Ukraine?

    The first paragraph in that link also links to this, which is an interesting read on the extinction threat. It is not nearly that cut-and-dry. The nuclear winter scenario has some climatological modeling issues that weren't known when it was formulated in the mid-1980s that ended up being...
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    Adding CF4 to the Martian Atmosphere (terraforming)

    Pretty much the only hazards are its reaction with alkali metals and the risk of asphyxiation. The carbon-fluorine bond is literally the strongest single bond in organic chemistry - about the only atmospheric gas that would be more inert would be... well, dinitrogen.
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    Adding CF4 to the Martian Atmosphere (terraforming)

    Ah, I misread your intent then - for pressure it could definitely work. I was thinking about the potential for surface reactions given fluorine's propensity to violently rip electrons away from other atoms, and it occurred to me that you could potentially in-situ liberate the oxygen in iron...
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