Nuclear spin relaxation of methane in solid xenon
Nuclear spin relaxation of methane in solid xenon
复制标题
固体氙中甲烷的核自旋弛豫
DOI：
10.1140/epjd/e2017-80564-0
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Yamakawa
中科院分区：
文献类型：
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作者：
T. Sugimoto;I. Arakawa;K. Yamakawa
用红外光谱研究了甲烷在固体氙中的核自旋弛豫。从振转峰的时间变化分析，得到了在5.1- 11.5K温度范围内，I = 2 <$1的核自旋弛豫速率与J = 0 <$1的转动弛豫速率的关系。根据弛豫速率与温度的关系，确定了间接双声子过程的激活能为50 ± 6 K，与J = 2 <$1和J = 3 <$1的转动跃迁能符合得很好.考虑到这个结果和自旋简并，我们认为最低J = 3能级（I = 1和I = 2态简并）是间接过程的中间点。
AbstractNuclear spin relaxation of methane in solid xenon has been studied by infrared spectroscopy. From the analysis of the temporal changes of the rovibrational peaks, the rates of the nuclear spin relaxation ofI= 2 ← 1 correlated to the rotational relaxation ofJ= 0 ← 1 were obtained at temperatures of 5.1–11.5 K. On the basis of the temperature dependence of the relaxation rate, the activation energy of the indirect two-phonon process was determined to be 50 ± 6 K, which is in good agreement with the rotational transition energies ofJ= 2 ← 1 andJ= 3 ← 1. Taking into account this result and the spin degeneracy, we argue that the lowestJ= 3 level in which theI= 1 andI= 2 states are degenerate acts as the intermediate point of the indirect process.Graphical abstract
甲烷在固体仲氢中的核自旋转化。
DOI：
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发表时间：
2008
期刊：
THE JOURNAL OF CHEMICAL PHYSICS 128
影响因子：
--
作者：
Yuki Miyamoto;他
通讯作者：
他