spin relaxation वाक्य

In simple cases, the intensity of the echo relative to the initial signal is given by " e " 2t / T 2 " where T 2 is the time constant for spin-spin relaxation.
where " j " is current density in the sample, " ! " sN and " ! " sF are the length of the spin relaxation in a non-magnetic and magnetic materials, respectively.
Owing to rapid spin relaxation, the electron-nuclear coupling is not observed in the NMR spectrum, so the affected nuclear resonance appears at the average of the two coupled energy states, " weighted according to their spin populations ".
In physics, the "'spin spin relaxation "'is the mechanism by which, the transverse component of the magnetization vector, exponentially decays towards its equilibrium value in nuclear magnetic resonance ( NMR ) and magnetic resonance imaging ( MRI ).
The mechanisms of nuclear-spin energy-coupling have been extensively characterized and are described in the following articles : Angular momentum coupling, Magnetic dipole dipole interaction, J-coupling, Residual dipolar coupling, Nuclear Overhauser effect, Spin spin relaxation, and Spin saturation transfer.

This relaxation process is described by the spin-lattice relaxation time T 1, which is a characteristic time needed by the magnetization to return to the z-axis, and by the spin-spin relaxation time T 2, which describes the vanishing time of the magnetization in the xy-plane.
where " ! " s is the average length of spin relaxation, and the z coordinate is measured from the boundary between the magnetic and non-magnetic layers ( z AS or by the so-called interface resistance ( inherent to the boundary between a ferromagnet and non-magnetic material)