Determination of Radiation Dose Leading to Molecular Chain Destruction of Amino Acids

The soft X-ray absorption spectroscopy (XAS) spectra of Alanine, L- and D-phenylalanine, D-tyrosine dissolved in a solid state were measured at BL17SU SPring-8. exhibited characteristic features dependent on the molecular structure. It was found that almost same obtained for Alanine Phenylalanine, while Tyrosine, spectral shape indicated drastic change owing to existence oxygen 1s → π* transitions COO¯. is irradiation promotes destruction reaction amino acids changes during spectroscopic measurement. rate by estimated from intensity as function time. Our results indicate ratio depends structure facilitated transitions.