Low temperature methyl group tunneling in polynorbornenes
The methyl group tunneling in amorphous materials is still not completely understood although some investigations are present in the literature. Especially no investigations at cryogenic temperatures are known. Therefore, it is suggested to carry out neutron backscattering on IN16B with the BATS option at cryogenic temperatures on a polynorbornene for which an anomalous broadening of the low temperature resolution measured at 4 K by time-of-flight spectroscopy in comparison to a corresponding polynorbornene was observed. The data will be analyzed by the rotational rate distribution model for methyl group rotation extended by the scattering function for quantum tunneling.
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SCHOENHALS Andreas; APPEL Markus; Bernhard Frick; SZYMONIAK Paulina Elzbieta and ZORN Reiner. (2021). Low temperature methyl group tunneling in polynorbornenes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-04-285
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