| Abstract: | The influence of relaxation and frequency detuning on the nutational frequency and the damping factor of a nutational interference
pattern is analyzed. It is established that relaxation leads to decrease in nutational frequency, while detuning increases
the nutation frequency. A relation is obtained between the relaxation times and the frequency detuning at which the influence
of both factors cancels out. Conditions such that singularities of the nutational nuclear-quadrupole-resonance (NQR) spectrum
(I=3/2) may be resolved are determined, and a formula for the asymmetry parameter ν is obtained, taking account of relaxation.
Having determined the region of existence of nutation and established the conditions under which the singularities of the
NQR spectrum of the powder (I=3/2) may be resolved, the asymmetry parameter may be reliably determined from the experimental nutational spectrum of the
powder. Experimental nutational35Cl NQR spectra are given for TiCl4 and 2,4,6-trichloro-1,3,5-triazine.
Kaliningrad State University, Baltiisk State Academy of the Russian Federation, Kaliningrad. Translated from Izvestiya Vysshikh
Uchebnykh Zavedenii, Fizika, Vol. 41, No. 12, pp 66–71, December, 1998. |
