Magneto-optic effect and its application for metals in γ-ray wavelength region

穆斯堡尔谱学观测到原子核对Ganma射线的无反冲共振吸收，可以像Lo^&lt；-9&gt；EV那样的超高能量分辨率确定原子核的能级细节。因此，有可能考察原子核和原子电子系统之间的超精细相互作用的细节，这是10^&lt；-7 ev量级的。从超精细相互作用参数出发，穆斯堡尔谱可以从微观上提供材料电子系统的细节。特别是，材料中的局域磁性可以从超精细磁场中得到解释，而穆斯堡尔谱通过超精细相互作用获得的信息提供了所谓的高T_c氧化物超导体、准晶体材料、人工多层膜和纳米金属颗粒的物理化学性质。此外，由于它具有超高的能量(频率)分辨率，因此可以从随时间变化的微小频移来测量由于发射器折射率位于发射器和吸收体之间的GaM射线相变。在这种情况下，源核和吸收核都会退化。然而，未被磁偶极相互作用简并的原子核可以根据磁场的方向和传播方向发射偏振的Ganma射线。利用这种偏振的GANMA射线，可以测量GANMA线在波长范围内的磁光效应。在这项研究中，我们发展了位相调制穆斯堡尔谱学、偏振GANMA光谱学和线偏振同步辐射的核共振散射。

Mossbauer spectroscopy observes recoilless resonant absorption of ganma-ray by nucleus, and it is posiible to determine the details of the nuclear energy level with an ultra-high energy resolution like a lO^<-9> eV in the case of ^<57>Fe nucleus. Therefore, it is possible to examine the details of the hyperfine interactions between nucleus and atomic electron system, which is 10^<-7> eV order. From the hyperfine interaction parameters, the Mossbaue spectroscopy can offer the detailes of the electron system of materials microscopically. Especially, the local magnetism in materials is possible to elucidate from the hyperfine magnetic field and the informations through the hyperfine interactions obtained from Mossbauer spectroscopy have offered the physical and chemical properties of so-called high-Tc oxides superconductor, quasi-cristalline materials, artificial multilayers and nano-meter sized metallic particles. Furthermore, the ganma-ray phase change due to the refractive index of the transmitter placed between ganma-ray source and absorber can be measured from the small frequenchy shifts when the phase change depends on the time, because of its ultra-high energy (frequency) resolution. In this case, both of source and absorber nuclei degenerates. However, the nucleus non-degenerated by magnetic dipole interaction can emitted the polarized ganma-ray depending on the direction of the magnetic field and the propagation direction. Using this polarized ganma-ray, it is posiible to measure the magneto-optic effect in wavelength range of ganma-ray. In this investigation, the phase modulation Mossbauer spectroscopy, spectroscopy using a polarized ganma-ray and the nuclear resonant scattering with linearly polarized synchrotron radiation have been developed.