Here, we provided to Weak Interactions Hand Written Note For BSC. In nuclear physics and particle physics, the weak interaction, which is also often called the weak force or weak nuclear force, is the mechanism of interaction between subatomic particles that is responsible for the radioactive decay of atoms. Free download PDF Weak Interactions Hand Written Note For BSC.
The effective range of the weak force is limited to subatomic distances and is less than the diameter of a proton. It is one of the four known force-related fundamental interactions of nature, alongside the strong interaction, electromagnetism, and gravitation. Free download PDF Weak Interactions Hand Written Note For BSC.
Weak interaction, also called weak force or weak nuclear force, a fundamental force of nature that underlies some forms of radioactivity, governs the decay of unstable subatomic particles such as mesons and initiates the nuclear fusion reaction that fuels the Sun. The weak interaction acts upon left-handed fermions—i.e., elementary particles with half-integer values of intrinsic angular momentum, or spin—and right-handed antifermions. Free download PDF Weak Interactions Hand Written Note For BSC.
BOOK NAME – WEAK INTERACTIONS HAND WRITTEN NOTE FOR BSC
SIZE – 4.69MB
PAGES – 8
Particles interact through the weak interaction by exchanging force-carrier particles known as the W and Z particles. These particles are heavy, with masses about 100 times the mass of a proton, and it is their heaviness that defines the extremely short-range nature of the weak interaction and that makes the weak interaction appear weak at the low energies associated with radioactivity. Free download PDF Weak Interactions Hand Written Note For BSC.
In radioactive decays, the strength of the weak interaction is about 100,000 times less than the strength of the electromagnetic force. However, it is now known that the weak interaction has intrinsically the same strength as the electromagnetic force, and these two apparently distinct forces are believed to be different manifestations of a unified electroweak force. Free download PDF Weak Interactions Hand Written Note For BSC.
Most subatomic particles are unstable and decay by the weak interaction, even if they cannot decay by the electromagnetic force or the strong force. The lifetimes for particles that decay via the weak interaction vary from as little as 10−13 seconds to 896 seconds, the mean life of the free neutron. Free download PDF Weak Interactions Hand Written Note For BSC.
Neutrons bound in atomic nuclei can be stable, as they are when they occur in the familiar chemical elements, but they can also give rise through weak decays to the type of radioactivity known as beta decay. In this case, the lifetimes of the nuclei can vary from a thousandth of a second to millions of years. Although low-energy weak interactions are feeble, they occur frequently at the heart of the Sun and other stars where both the temperature and the density of matter are high. Free download PDF Weak Interactions Hand Written Note For BSC.
In the nuclear fusion process that is the source of stellar energy production, two protons interact via the weak interaction to form a deuterium nucleus, which reacts further to generate helium with the concomitant release of large amounts of energy. Free download PDF Weak Interactions Hand Written Note For BSC.
The characteristics of the weak interaction, including its relative strength and effective range and the nature of the force-carrier particles, are summarized in the Standard Model of particle physics. Free download PDF Weak Interactions Hand Written Note For BSC.
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