Large isotope effect due to quantum tunneling in the conversion reaction of electrons to hydrogen and deuterium atoms in irradiated water/heavy water ice
Large isotope effect due to quantum tunneling in the conversion reaction of electrons to hydrogen and deuterium atoms in irradiated water/heavy water ice
复制标题
辐照水/重水冰中电子转化为氢和氘原子的反应中由于量子隧道效应而产生的大同位素效应
DOI：
10.1021/j100192a005
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
K. Nunome
中科院分区：
文献类型：
--
作者：
H. Muto;K. Matsuura;K. Nunome
在4.2 K条件下，用ESR光谱研究了水的H/D同位素效应，阐明了水的辐射分解机理。仅在H含量低于3%的h2o / d2o混合物中被捕获的辐射诱导电子在4.2 K时选择性地转化为孤立的H原子，并对转化率(κ H/ κ D) /(H/D)冰>10 3表现出非常大的影响，可能是由于隧道作用
A H/D isotope effect in water radiolysis was studied at 4.2 K by ESR spectroscopy to elucidate the radiolysis mechanism. Radiation-induced electrons, which are trapped only in the H 2 O/D 2 O mixtures with H contents lower than 3%, were selectively converted to isolated H atoms at 4.2 K and exhibited a very large effect on the conversion rate: (κ H /κ D )/(H/D) ice >10 3 , presumably due to tunneling