What is meant by hyperfine interaction?
3.11. 1.4 HFI mechanism. Hyperfine interaction (HFI), i.e., interaction of electrons with nuclear spins, yields more optimistic estimates. For example, when one of the radicals has nuclei with a magnetic moment, radical spins precess in markedly different MFs.
What is hyperfine fine structure?
Fine structure describes the splitting of the spectral lines of atoms due to electron spin and relativistic corrections to the non-relativistic Schrödinger equation. The hyperfine structure is caused by interaction between magnetic field (from electron movement) and nuclear spin.
What is the difference between fine structure and hyperfine structure?
The key difference between fine and hyperfine structure is that in fine structures, the line splitting is a result of the energy changes that are produced by electron spin-orbit coupling, whereas in hyperfine structures, the line splitting is a result of the interaction between the magnetic field and nuclear spin.
What is spin of nucleus?
It is common practice to represent the total angular momentum of a nucleus by the symbol I and to call it “nuclear spin”. The nuclear spins for individual protons and neutrons parallels the treatment of electron spin, with spin 1/2 and an associated magnetic moment. …
What do you mean by spin orbit interaction?
In quantum physics, the spin–orbit interaction (also called spin–orbit effect or spin–orbit coupling) is a relativistic interaction of a particle’s spin with its motion inside a potential. The spin–orbit interaction is one cause of magnetocrystalline anisotropy and the spin Hall effect.
What is relativistic correction?
Relativistic correction is a correction to take in the relativistic effect arising when the velocity of an electron becomes high to an extent which cannot be neglected compared with the velocity of light.
What are normal and anomalous Zeeman effect?
Normal vs Anomalous Zeeman Effect The splitting of a spectral line of an atom into three lines in a magnetic field is called normal Zeeman effect. The splitting of a spectral line of an atom into four or more line in a magnetic field is called anomalous Zeeman effect.
What is a second cesium?
A second (symbol s) is the base unit of time in the International System of Units (SI Units). In 1967 it was defined as the duration of 9,192,631,770 ‘oscillations’ of a caesium 133 atom (133Cs).
What is fine structure of spectral lines?
fine structure, in spectroscopy, the splitting of the main spectral lines of an atom into two or more components, each representing a slightly different wavelength. Fine structure is produced when an atom emits light in making the transition from one energy state to another.