MUON LEVEL-CROSSING RESONANCE OF THE R3NMU+ ION
MUON LEVEL-CROSSING RESONANCE OF THE R3NMU+ ION
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DOI：
10.1007/bf02068484
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发表时间：
1994-01-01
影响因子：
--
通讯作者：
COX, SFJ
中科院分区：
文献类型：
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作者：
COX, SFJ
本文报道了在冷冻的三乙胺溶液中观察到的μ子与N-14核的能级交叉共振，并将其归属于离子种类（C_2H_5）_3NMu ~+。在形成这种物质的过程中，注入的正μ子像往常一样模仿质子的化学行为，这里的过程类似于碱的质子化。由此产生的分子离子具有轴对称性，这是探测与自旋积分核的能级交叉所必需的。四极耦合常数为0.41（4）MHz，对应于N-14上的电场梯度为0.10（1）a.u.并与R3 NMu+型物种的从头算估计一致。讨论了氨中铵离子NH_3Mu ~+的检测前景。
Observation of muon level crossing resonance with N-14 nuclei in frozen triethylamine is reported and assigned to the ionic species (C2H5)3NMu+. In forming this species, the implanted positive muons mimic the chemical behaviour of protons as usual, here in a process analogous to the protonation of a base. The resultant molecular ion has the axial symmetry necessary for detection of level crossing with an integral-spin nucleus. The quadrupole coupling constant is determined to be \e2qQ/h\ = 0.41(4)MHz, corresponding to an electric field gradient on N-14 of 0.10(1)a.u. and consistent with an ab initio estimate for species of the type R3NMu+. The prospects for detection of the muonium-substituted ammonium ion NH3Mu+ ion in ammonia are discussed.