Solid State Spectroscopy by Synchrotron Radiation

同步辐射固态光谱学

基本信息

批准号：
01460026
负责人：
IKEZAWA Mikihiko
金额：
$ 4.35万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

1. The far-infrared spectroscopy port at The Institute for Molecular Science has been utilized to measure absorption of Rb_2Agl_3 and K_2Agl_3 crystals of small sizes. Anisotropic absorption spectra with many fine structure have been obtained. In superionic crystals of RbAg_4I_5 and KAg_4I_5 increase of reflectivity has been observed in the millimeter wave region, which can be interpreted as being due to the ionic plasmon. 2. The electron beam accelerated by an S-band linac at The Laboratory of Nuclear Science, Tohoku University, was bent by a magnetic field of 0.2 T to emit intense coherent synchrotron radiation in the wavelength range from 0.2 to mm. A bunch form factor was calculated from the spectrum and the number of electron in one bunch, and the distribution function of electron in a bunch was obtained from it. It was nearly a Gaussian with the width of about 0.3 mm. It has been concluded that the distribution function has a sharp structure. Using the coherent radiation, reflectivity of RbAg_4I_5 crystal was observed and Drude like behavior has been confirmed in the millimeter wave region. A system for solid steate spectroscopy under magnetic field of 5 T is prepared by installing a superconducting magnet. 3. By bendng electron beams from an L-band linac at KUR Kyoto University, extremely intense coherent synchrotron radiation was observed in the millimeter wave region from 1 to 8 mm. Spectra of coherent Cherenkov radiation and wake fieled radiation were also observed for the first time, which had similar shapes to the spectrum of the synchrotron radiation.

1。分子科学研究所的远红外光谱端口已用于测量小尺寸的RB_2AGL_3和K_2AGL_3晶体的吸收。已经获得了许多精细结构的各向异性吸收光谱。在RBAG_4I_5和KAG_4I_5的超离子晶体中，在毫米波区域已经观察到反射率的增加，这可以解释为由于离子等离子体引起的。 2。由核科学实验室的S频段林纳克加速的电子束，由0.2 t的磁场弯曲，以在0.2到mm的波长范围内发射强烈的相干同步辐射。从一束中的光谱和电子数量计算出一束外形，并从中获得了电子中电子的分布函数。它几乎是一个高斯，宽度约为0.3毫米。已经得出结论，分布函数具有鲜明的结构。使用连贯的辐射，观察到RBAG_4I_5晶体的反射率，并在毫米波区域确认了Drude类似行为。通过安装超导磁体来制备5 T磁场下固体脂肪光谱的系统。 3。借助京都大学L频段Linac的Bendng电子梁，在1到8 mm的毫米波区域观察到了极其激烈的相干同步辐射。还首次观察到相干切伦科夫辐射和唤醒射辐射的光谱，其形状与同步辐射的光谱相似。