稳恒电场对HeII微波共振吸收的影响
The influence of the stationary electric field upon the resonance absorption of microwaves in HeII
摘要：
实验研究了稳态电场中40-200 GHz电磁波与超流氦的相互作用。研究发现，在电场中，共振吸收谱线在共振频率处分裂成两条对称的谱线。分裂幅度几乎与电场呈线性增加，这表明存在线性斯塔克效应。结果得到了He Ⅱ的取向极化率和偶极矩（10^（-34）C*m）。结果表明，谱线轮廓由两部分组成-共振吸收（或感应辐射时产生的超流流）和广泛的背景窄线。背景与最新的中子数据的roton线。
英文摘要：
The interaction between electromagnetic microwaves (40-200 GHz) and superfluid helium in a stationary electric field has been investigated experimentally. It is found that the narrow line of resonance absorption at the roton frequency is split in the electric field into two symmetric lines. The splitting magnitude increases almost linearly with the electric field, which suggests a linear Stark effect. The results obtained point of orientational polarizability and dipole moment (10^(-34)C*m) in HeII. It is shown that the spectral line profile consists of two parts - a narrow line of resonance absorption (or induced radiation when superfluid stream are generated) and a broad background. The background with agrees well with the latest neutron data for the roton line.
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