NH3 dynamics in Zn(NH3)4I2 and Zn(NH3)4Br2 investigated by incoherent quasielastic neutron scattering

6533b870fe1ef96bd12d03ae

RESEARCH PRODUCT

NH3 dynamics in Zn(NH3)4I2 and Zn(NH3)4Br2 investigated by incoherent quasielastic neutron scattering

Felix Altorfer Ralf Essmann

subject

Physics Arrhenius equation Quasielastic scattering Spectrometer Analytical chemistry Activation energy Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Nuclear physics symbols.namesake Quasielastic neutron scattering symbols Electrical and Electronic Engineering Fermi Gamma-ray Space Telescope Line (formation)

description

We report on studies of NH3 dynamics in Zn(NH3)4I2 and Zn(NH3)4Br2 by means of incoherent quasielastic neutron scattering in the temperature range from 150 to 300 K. Quasielastic experiments were carried out on the Fermi chopper time-of-flight spectrometer at NIST. The Lorentzian full-widths at half-maximum, ƒw, of the quasielastic line follow an Arrhenius law and increase from 0.39 [0.25] meV at 150 K to 1.33 [0.80] meV at 300 K. We find an activation energy Ea for the NH3 reorientations of 32(1) and 30(3) meV for Zn(NH3)4I2 and Zn(NH3)4Br2, respectively.

year	journal	country	edition	language
1997-06-01	Physica B: Condensed Matter

https://doi.org/10.1016/s0921-4526(96)00879-4

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