Rotational tunneling splitting of the NH4 ion in NH4ClO4 studied by inelastic neutron scattering

作者: M. Prager , B. Alefeld

DOI: 10.1063/1.432968

关键词:

摘要: The tunneling splitting of the NH4‐librational ground state in NH4ClO4 has been measured by high resolution inelastic neutron scattering at a temperature 4.5 K. spectrum shows four tunnel lines energy transfers 1.63±0.20, 4.06±0.20, 5.52±0.10, and 7.10±0.10 μeV. A discussion hindrance potential is given.

参考文章(15)
CHUN C. LIN, JEROME D. SWALEN, Internal Rotation and Microwave Spectroscopy Reviews of Modern Physics. ,vol. 31, pp. 841- 891 ,(1959) , 10.1103/REVMODPHYS.31.841
J. J. Rush, T. I. Taylor, Rotational Motions in Hexamethylbenzene and Ammonium Perchlorate by Cross Section Measurements with Slow Neutrons1 The Journal of Physical Chemistry. ,vol. 68, pp. 2534- 2537 ,(1964) , 10.1021/J100791A024
W. Press, A. Kollmai, CH4: Tunneling states, rotations, and phase transition in a quantum molecular crystal Solid State Communications. ,vol. 17, pp. 405- 408 ,(1975) , 10.1016/0038-1098(75)90465-2
R. Ikeda, C.A. McDowell, Spin-rotational relaxation for protons in solid, NH4 ClO4 Chemical Physics Letters. ,vol. 14, pp. 389- 392 ,(1972) , 10.1016/0009-2614(72)80220-3
T. Nagamiya, On the Zero Point Entropy of Methane Crystal Progress of Theoretical Physics. ,vol. 6, pp. 702- 713 ,(1951) , 10.1143/PTP/6.5.702
H. J. Prask, S. F. Trevino, J. J. Rush, Quasielastic neutron scattering study of ammonium‐ion reorientations in ammonium perchlorate Journal of Chemical Physics. ,vol. 62, pp. 4156- 4160 ,(1975) , 10.1063/1.430295
JW Riehl, Richard Wang, HW Bernard, None, Magnetic resonance and relaxation in NH4ClO4 The Journal of Chemical Physics. ,vol. 58, pp. 508- 515 ,(1973) , 10.1063/1.1679231
A. Hüller, D. M. Kroll, Rotational tunneling in solids Journal of Chemical Physics. ,vol. 63, pp. 4495- 4504 ,(1975) , 10.1063/1.431129
W. Güttler, J.U. Von Schütz, Proton spin-lattice relaxation and exchange splitting of the torsional ground state in NH4ClO4 Chemical Physics Letters. ,vol. 20, pp. 133- 137 ,(1973) , 10.1016/0009-2614(73)85238-8
R. E. Richards, T. Schaefer, Motional narrowing and line shapes in some ammonium salts Transactions of the Faraday Society. ,vol. 57, pp. 210- 222 ,(1961) , 10.1039/TF9615700210