Nuclear Magnetic Resonance Experiments on Ammonium Halides, II Halogen Nuclear Magnetic Resonance
Nuclear Magnetic Resonance Experiments on Ammonium Halides, II Halogen Nuclear Magnetic Resonance
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卤化铵的核磁共振实验，II 卤素核磁共振
DOI：
10.1143/jpsj.17.481
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发表时间：
1962
影响因子：
1.7
通讯作者：
Y. Yamagata
中科院分区：
文献类型：
--
作者：
J. Itoh;Y. Yamagata
测量了氯化铵、溴化铵和碘化铵在不同相态下的化学位移、自旋-晶格弛豫时间和核磁共振谱线强度。结果表明，铵离子的重取向运动是弛豫核自旋取向所必需的含时相互作用的起源。的卤素离子的核心，所产生的与碱金属离子的相互作用，变形进行了讨论与化学位移和自旋晶格弛豫时间。在有序相中，氯化物的T1比II相的T1长得多，而溴化物的NMR谱线出现电四极分裂，并估算了有序参数。根据强度测量结果，讨论了晶体缺陷对核磁共振的影响。
The chemical shift, spin-lattice relaxation time, and intensity of nuclear magnetic resonance line were measured for ammonium chloride, bromide and iodide in various phases. It was found that the reorientational motion of ammonium ion is the origin of time dependent interaction necessary to relax the nuclear spin orientation. The deformation of the halogen ion core, arising from the interaction with alkali ions, is discussed in connection with the chemical shift and spin-lattice relaxation time. In ordered phase, T 1 in the chloride became much longer than that in phase II, while in the bromide electric quadrupole splitting of NMR line appeared, and the ordering parameter was estimated. From the result of the intensity measurements, the effect of crystal imperfection upon NMR is discussed.