Phys. Rev. A 59, 4087–4090 (1999)Transient nutations decay: The effect of field-modified dipolar interactionReceived 14 December 1998; published in the issue dated May 1999 The anomalous behavior of transient nutations is experimentally investigated in a set of two-level (S=1/2) spin systems differing only in spin concentration. Our results show that the non-Bloch power dependence of the decay rate of transient nutations is a concentration-dependent effect, which is more and more pronounced in more and more concentrated samples. The experimental results are interpreted in the framework of the recent theory by Shakhmuratov et al. [Phys. Rev. Lett. 79, 2963 (1997)] and support the hypothesis that the anomalous decay of transient nutations in solids originates from radiation-induced changes of the dipolar field, rather than from residual fluctuations of the nominally coherent field. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.59.4087
DOI:
10.1103/PhysRevA.59.4087
PACS:
42.50.Md, 76.30.Mi, 76.90.+d
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