甘氨酸软X-射线辐射损伤机理的XPS研究

本文在设有镁和铝X-射线源的电子能谱仪中研究甘氨酸在软X-射线作用下的辐射损伤行为。XPS分析表明:(1)辐射损伤是一级动力学反应,(2)损伤过程有脱羧反应,(3)损伤过程没有脱氨反应,而是光化学还原作用使原来—NH₃中的氮原子转化生成—NH₂。     

MECHANISM OF SOFT X-RAY RADIATION DAMAGE ON GLYCINE BY XPS

This paper roports the behaviour of radiation damage of solid glycine in a XPS spectrom-ter equipped with Mg and Al X-ray sources. The main results are as follows: (i) the kinet-ics of the damage process obeys the first-order rate law, (ii) decarboxylation can be deduced,and (iii) deamination does not occur, but the nitrogen atoms in original molecules are trans-formed into a new chemical form with higher electron density by photo-reduction.