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Physics works! And I'm still alive!
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The latest Messages 2
2023-07-06 11:22:07
An elastocaloric cooling system that absorbs heat as tension is released in bundles of metal tubes has been developed by a team of researchers in the US and China. Source: Click here
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@Physics
1.4K views08:22
2023-07-05 06:55:52
A binary pulsar is a pulsar with a binary companion, often a white dwarf or neutron star. (In at least one case, the double pulsar PSR J0737-3039, the companion neutron star is another pulsar as well.) Binary pulsars are one of the few objects which allow physicists to test general relativity because of the strong gravitational fields in their vicinities. Although the binary companion to the pulsar is usually difficult or impossible to observe directly, its presence can be deduced from the timing of the pulses from the pulsar itself, which can be measured with extraordinary accuracy by radio telescopes.━━━━━━━━━━━
@Physics
2.8K views03:55
2023-07-04 09:21:40
The resolution of synchrotron X-ray scanning tunnelling microscopy has reached the single-atom limit for the first time. Source: Click here
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@Physics
3.3K views06:21
2023-07-03 10:03:53
The slow neutron-capture process, or s-process, is a series of reactions in nuclear astrophysics that occur in stars, particularly asymptotic giant branch stars. The s-process is responsible for the creation (nucleosynthesis) of approximately half the atomic nuclei heavier than iron.
In the s-process, a seed nucleus undergoes neutron capture to form an isotope with one higher atomic mass. If the new isotope is stable, a series of increases in mass can occur, but if it is unstable, then beta decay will occur, producing an element of the next higher atomic number. The process is slow (hence the name) in the sense that there is sufficient time for this radioactive decay to occur before another neutron is captured. A series of these reactions produces stable isotopes by moving along the valley of beta-decay stable isobars in the table of nuclides.━━━━━━━━━━━
@Physics
4.0K views07:03
2023-07-02 07:26:21
Presolar grains are interstellar solid matter in the form of tiny solid grains that originated at a time before the Sun was formed. Presolar stardust grains formed within outflowing and cooling gases from earlier presolar stars.
The stellar nucleosynthesis that took place within each presolar star gives to each granule an isotopic composition unique to that parent star, which differs from the isotopic composition of our solar system's matter as well as from the galactic average. These isotopic signatures often fingerprint very specific astrophysical nuclear processes that took place within the parent star and prove their presolar origin.━━━━━━━━━━━
@Physics
4.3K views04:26
2023-07-01 06:36:30
A pentaquark is a human-made subatomic particle, consisting of four quarks and one antiquark bound together; they are not known to occur naturally, or exist outside of experiments specifically carried out to create them.As quarks have a baryon number of ++ 1/3, and antiquarks of −+ 1/3, the pentaquark would have a total baryon number of 1, and thus would be a baryon. Further, because it has five quarks instead of the usual three found in regular baryons (a.k.a. 'triquarks'), it is classified as an exotic baryon. The name pentaquark was coined by Claude Gignoux et al. (1987) and Harry J. Lipkin in 1987; however, the possibility of five-quark particles was identified as early as 1964 when Murray Gell-Mann first postulated the existence of quarks. Although predicted for decades, pentaquarks proved surprisingly difficult to discover and some physicists were beginning to suspect that an unknown law of nature prevented their production.━━━━━━━━━━━
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4.6K views03:36
2023-06-30 07:54:25
Photon-counting CT improves cardiac imaging quality in children with suspected heart defects, without increasing the radiation dose. Source: Click here
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@Physics
4.6K views04:54
2023-06-29 07:24:32
In particle physics, a hadron is a composite subatomic particle made of two or more quarks held together by the strong interaction. They are analogous to molecules that are held together by the electric force. Most of the mass of ordinary matter comes from two hadrons: the proton and the neutron, while most of the mass of the protons and neutrons is in turn due to the binding energy of their constituent quarks, due to the strong force.━━━━━━━━━━━
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5.3K views04:24
2023-06-28 06:50:58
A wearable brain scanner can measure brain function whilst people are standing and walking around. Source: Click here
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@Physics
5.4K views03:50
2023-06-27 06:11:00
In particle physics, a shower is a cascade of secondary particles produced as the result of a high-energy particle interacting with dense matter. The incoming particle interacts, producing multiple new particles with lesser energy; each of these then interacts, in the same way, a process that continues until many thousands, millions, or even billions of low-energy particles are produced. These are then stopped in the matter and absorbed.━━━━━━━━━━━
@Physics
5.8K views03:11
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