Download Nuclear Magnetic Relaxation by Dr. N. Bloembergen (auth.) PDF

By Dr. N. Bloembergen (auth.)

Show description

Read Online or Download Nuclear Magnetic Relaxation PDF

Similar magnetism books

Mathematical Theory of Diffraction

Arnold Sommerfeld's Mathematical concept of Diffraction marks a milestone in optical conception, choked with insights which are nonetheless suitable this day. In a beautiful travel de strength, Sommerfeld derives the 1st mathematically rigorous answer of an optical diffraction challenge. certainly, his diffraction research is a shockingly wealthy and intricate mixture of natural and utilized arithmetic, and his often-cited diffraction resolution is gifted in simple terms as an software of a way more basic set of mathematical effects.

Radiation Belts: Models and Standards

Released by means of the yank Geophysical Union as a part of the Geophysical Monograph sequence, quantity ninety seven. The intriguing new result of CRRES and SAMPEX exhibit that there are extra actual assets of lively electrons and ions trapped within the Van Allen belts, a few of that have been thoroughly unforeseen. The NASA and Russian empirical versions of the radiation belts have to be up-to-date and prolonged.

Electron Paramagnetic Resonance Volume 22

Content material: fresh advancements and purposes of the Coupled EPR/Spin Trapping strategy (EPR/ST); EPR Investigations of natural Non-Covalent Assemblies with Spin Labels and Spin Probes; Spin Labels and Spin Probes for Measurements of neighborhood pH and Electrostatics via EPR; High-field EPR of Bioorganic Radicals; Nuclear Polarization in drinks

Extra resources for Nuclear Magnetic Relaxation

Example text

4) We are allowed to consider the nuclei as a voltage generator re~ presented in fig. 3. 10. The diagram holds also for the bridge of fig. 3. 3. The bridge of fig. 3. 4 behaves as a volta ge gene~ rator 6. Vj2 with an internal resistance R o/2. By virtue of its dependance on the susceptibility is 6. V R0 a function of the Larmor frequency and so of the magnetic field Ho. One canplot 6. V in the complex plane. · 65) with a factor 1/2for the li~ near X' and X". one finds that the locus of 6. V is a circ1e 1.

From (2. 65) we see that saturation occurs if y2 H l 2 Tl T 2 ~ 1. Assuming T 2 = 10- 5 sec, corresponding to a width of the proton line of about 3 oersted, we find that the relaxation time could be about four hours without saturating the spin system. An upper limit for the relaxation time in paraffin of 60 sec was established by observing the resonance as quickly as possible after the magnetic field Ho is applied. Immediately after the field is switched on, the relative population of the protons in the upper and lower level will be given by the a-priori probabilities of these levels, which are equal.

The proper factor has been calculated by Va n V I eck (V 3) in a rigorous manner with the diagonal sum method, using formula (2. 32). For Hop we take the terms of type A ami B of the perturbation =+ I I V ij • The component of the magnetic moment, rotating with the j>i applied radio frequency Seld, is proportional to I j Ix. ' J We can evaluate the commutator by making use of the commutation rules which exist for the components of the angular momentum operator I. Va n VI e ck's (V 3) result is This formula.

Download PDF sample

Rated 4.13 of 5 – based on 13 votes