Present status of vacuum ultraviolet natural circular dichroism measurement system using polarizing undulator at TERAS BL5 beamline
详细信息 查看全文
- 作者：Masahito Tanaka ; Kazutoshi Yagi-Watanabe ; Fusae Kaneko ; Kazumichi Nakagawa
- 关键词：Circular dichroism ; Modulation spectroscopy ; Amino acids ; Vacuum ultraviolet ; Extreme ultraviolet ; Polarizing undulator
- 刊名：Journal of Electron Spectroscopy and Related Phenomena
- 出版年：2010
- 出版时间：August 2010
- 年：2010
- 卷：181
- 期：2-3
- 页码：177-180
- 全文大小：221 K
文摘
The study of natural circular dichroism (CD) in the vacuum and extreme ultraviolet (VUV and EUV) regions has been providing us with chirality and structural information on biomolecules. We have developed the beamline BL5 at TERAS, Tsukuba, which is equipped with a compact Onuki-type polarizing undulator. This beamline is dedicated to measuring the CD spectra in the VUV and EUV regions for the photon energy region of 5–40 eV. The use of a polarization modulation technique with a polarizing undulator is essential for detecting a weak CD signal. Using this CD system, the natural CD spectrum has been measured in the EUV region up to 40 eV for the first time. In addition, the differences and the similarities between the CD spectra of four amino acid films (alanine, valine, leucine, and phenylalanine) in the VUV region up to 9.5 eV are determined.