Observation of CH3 Tunneling Manifold by Level-Crossing NMR

Changho Choi, Mik M. Pintar

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Rotational tunneling spectra of strongly hindered CH3 torsional oscillator pairs which do not interact among themselves are reported. These results are obtained by applying the Zeeman-tunneling level matching method in the proton spin rotating frame. Two noninteracting CH3 particle manifolds explain the observed CH3 multiquantum transitions driven by intramolecular and/or intermolecular dipole-dipole interactions to first or second order. Level matching resonances indicating that two methyl groups simultaneously undergo a symmetry breaking transition are observed. The dependencies of level-crossing transitions on Zeeman-tunneling mixing time and tilt angle are reported.

Original languageEnglish (US)
Pages (from-to)527-530
Number of pages4
JournalPhysical Review Letters
Issue number3
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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