@article {495,
	title = {Pulsed Fourier-Transform Nqr of N-14 with a Dc Squid},
	journal = {Physical Review Letters},
	volume = {69},
	year = {1992},
	note = {Phys Rev LettJe754Times Cited:23Cited References Count:27},
	month = {Jul 27},
	pages = {684-687},
	abstract = {<p>The zero-field free induction decay of solid ammonium perchlorate at 1.5 K has been directly detected with a dc superconducting quantum interference device. The Fourier-transform spectrum consists of three sharp lines at 17.4, 38.8, and 56.2 kHz arising from pure N-14 nucLear quadrupole resonance transitions. The absence of splittings and resonance transitions from dipolar-coupled proton spins is attributed to reorientation of the ammonium groups by quantum tunneling in combination with motional averaging in the three proton levels characterized by the irreducible representation T. The measured N-14 spin-spin relaxation time is 22+/-2 ms and the spin-lattice relaxation time is 63+/-6 ms.</p>
},
	keywords = {nh4clo4},
	isbn = {0031-9007},
	doi = {Doi 10.1103/Physrevlett.69.684},
	url = {<Go to ISI>://WOS:A1992JE75400034},
	author = {Hurlimann, M. D. and Pennington, C. H. and Fan, N. Q. and Clarke, J. and Pines, A. and Hahn, E. L.}
}
@article {551,
	title = {Nuclear Magnetic-Resonance with Dc Squid Preamplifiers},
	journal = {Ieee Transactions on Magnetics},
	volume = {25},
	year = {1989},
	note = {Ieee T MagnT6706Times Cited:21Cited References Count:23},
	month = {Mar},
	pages = {1193-1199},
	isbn = {0018-9464},
	doi = {Doi 10.1109/20.92510},
	url = {<Go to ISI>://WOS:A1989T670600113},
	author = {Fan, N. Q. and Heaney, M. B. and Clarke, J. and Newitt, D. and Wald, L. L. and Hahn, E. L. and Bielecki, A. and Pines, A.}
}
