Ammonium ion dynamics in NH₄Br at high pressure - type of reorientation

J. Wasicki Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznań, Poland

D. P. Kozlenko Frank Laboratory of Neutron Physics, JINR, 141980, Dubna, Moscow Region, Russia

S. Lewicki Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznań, Poland

R. Goc Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznań, Poland

B. N. Savenko Frank Laboratory of Neutron Physics, JINR, 141980, Dubna, Moscow Region, Russia

Abstract

Proton NMR relaxation measurements were performed for ammonium bromide at pressures up to 800 MPa. The correlation functions for ammonium ion reorientation were calculated by Monte Carlo method. Knowledge of these functions allow calculation of the NMR relaxation times T₁. Comparison between experimental and calculated values of relaxation times gives some insight into the model of ammonium ion reorientation.

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Ammonium ion dynamics in NH₄Br at high pressure - type of reorientation

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Ammonium ion dynamics in NH₄Br at high pressure - type of reorientation