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Randomly fluctuating magnetic fields

A. Interaction with randomly fluctuating magnetic fields... [Pg.3]

A. Interaction with Randomly Fluctuating Magnetic Fields 36)... [Pg.20]

Thermal motions in nucleic acids produce random, fluctuating magnetic fields that may influence the relaxation of nuclei on the nucleic acid which are interacting with the fluctuating fields. The strength of the interaction as well as the nature of and rate of the fluctuations will govern the nuclear spin relaxation. The strength of the interaction can be expressed in terms of a Hamiltonian. Molecular motions will cause the orientation of the Hamil-... [Pg.350]

Ms value but on different positions in space. This random motion of the electron around the nucleus is again seen as a fluctuating magnetic field that causes nuclear relaxation through dipolar coupling. [Pg.76]

The magnetic field b(t) is, for instance, created by another spin (nuclear spin or the spin of an unpaired electron) in that case, it is proportional to 1/r (r distance between the two spins). Its time dependency arises from the orientation of r and/or from the distance fluctuation. However, in this section, we shall disregard the origin of b t) and we only rest on its general properties (assuming an isotropic medium) which arise from the random nature of molecular motions ... [Pg.20]

Specifically, we analyze the following problem a spin S is coupled to a controlled magnetic field B (stationary for now, but to be varied slowly in a Berry-phase experiment) and a randomly fluctuating field -X (f), which we treat as a random variable with the correlation function given by Sxit). Its dynamics is governed by the Larmor equation ... [Pg.21]

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