gyromagnetic वाक्य
उदाहरण वाक्य
मोबाइल
- What is more, the value of the gyromagnetic ratio of the electron, standing in front of Pauli's new term, is explained from first principles.
- He also researched the photoelectric effect, the gyromagnetic effect, the emission of electrons by chemical reactions, soft X-rays, and the spectrum of hydrogen.
- For a spinning charged solid with a uniform charge density to mass density ratio, the gyromagnetic ratio is equal to half the charge-to-mass ratio.
- Alternative methods are therefore necessary for nuclei with a negative gyromagnetic ratio, and one such method using the INEPT pulse sequence was proposed by Ray Freeman in 1979.
- Hydrogen is the most frequently imaged nucleus in MRI because it is present in biological tissues in great abundance, and because its high gyromagnetic ratio gives a strong signal.
- The Proton was found to have a gyromagnetic ratio g _ p = 5.58 which is 2.79 times larger than that predicted by the Dirac equation.
- This constant arises naturally in a number of physical problems, including in the second-and third-order terms of the electron's gyromagnetic ratio using quantum electrodynamics.
- Where " g s " is the spin gyromagnetic ratio ( a . k . a . " spin spin operator vector, whose components are the Pauli matrices, hence
- Where is the gyromagnetic ratio, is the magnetic moment, is the damping coefficient and is the effective magnetic field ( the external field plus any self-induced field ).
- Another reason is the ability to 13 C isotope, which is more easy to measure than the usually used hydrogen atoms mainly because of its magnetic properties ( such as its gyromagnetic ratio ).
- However, for NOE, a negative value of " K ", the ratio of gyromagnetic ratios of the nuclei, may result in a " reduction " in signal intensity.
- For 15 N ( Nitrogen-15 NMR spectroscopy ) which has a negative gyromagnetic ratio, if the dipolar relaxation has to compete with other mechanisms, the observed 15 N signal can be near zero.
- The relaxation time, " T 1 " ( the average lifetime of nuclei in the higher energy state ) is dependent on the gyromagnetic ratio of the nucleus and the mobility of the lattice.
- Unlike NOE, no penalty is incurred by a negative gyromagnetic ratio in INEPT, it is therefore a useful method for enhancing the signal from nuclei with negative gyromagnetic ratio such as 15 N or 29 Si.
- Unlike NOE, no penalty is incurred by a negative gyromagnetic ratio in INEPT, it is therefore a useful method for enhancing the signal from nuclei with negative gyromagnetic ratio such as 15 N or 29 Si.
- These procedures rely on the fact that bulk magnetization due to nuclear spins precess in a magnetic field at a rate called the Larmor frequency, which is simply the product of the gyromagnetic ratio with the magnetic field strength.
- Equating the left and right hand sides, and noting that \ frac { 2 \ mu } { \ hbar } is the gyromagnetic ratio \ gamma, yields another form for the equations of motion of the Bloch vector
- Where g _ l = 1 and g _ s \ approx 2.0023192 ( the latter is called the anomalous gyromagnetic ratio; the deviation of the value from 2 is due to the effects of quantum electrodynamics ).
- Where is the actual strength of the magnet in units like gauss, and is the gyromagnetic ratio of the nucleus being tested which is in turn calculated from its magnetic moment and spin number with the nuclear magneton and the Planck constant:
- When applied a one-electron atom or ion, setting "'0 "'} } and to the appropriate electrostatic potential, additional relativistic terms include the spin-orbit interaction, electron gyromagnetic ratio, and Darwin term.
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