Abstract:
:We have developed an improved circular dichroism (CD) and linear dichroism (LD) simultaneous measurement system for the vacuum ultraviolet (VUV) region by polarization modulation techniques using a four-period Onuki-type crossed undulator as a polarized light source. The system has been constructed at the VUV beamline BL-5 in the electron storage ring TERAS, at AIST. Our improvements, in particular the adoption of an optical chopper as the detection method of incident light, have resulted in a flat baseline and a consequent simplification of the Mueller matrix calculation for our optical system. Based on the Mueller matrix calculation, we have successfully measured real VUV-CD and LD spectra of leucine films for wavelengths down to 160 nm with absolute optical constants. The obtained spectra show good consistency with spectra measured by conventional methods.
journal_name
Chiralityjournal_title
Chiralityauthors
Tanaka M,Yagi-Watanabe K,Yamada T,Kaneko F,Nakagawa Kdoi
10.1002/chir.20234subject
Has Abstractpub_date
2006-02-01 00:00:00pages
196-204issue
3eissn
0899-0042issn
1520-636Xjournal_volume
18pub_type
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