Zero field NMR
Encyclopedia
Zero field NMR is the NMR spectrum analysis of certain substances in an environment carefully screened from magnetic fields. It is useful for studying nuclei with spins greater than 1/2, and for studying molecular dynamics http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JCPSA6000087000012006867000001&idtype=cvips&gifs=yes.

It is "commonly but inaccurately known as nuclear quadrupole resonance
Nuclear Quadrupole Resonance
Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance .-Principle:In NMR, nuclei with spin ≥ 1/2 have a magnetic dipole moment so that their energies are split by a magnetic field, allowing resonance absorption of energy related to...

" (NQR).http://www.freepatentsonline.com/6919838.html.
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