STUDY OF ELECTRONIC AND PHOTONIC COLLISIONS WITH MOLECULES USING A STORAGE RING FOR BIOMOLECULAR IONS

利用静电存储环研究了各种生物分子的电子-离子和光子-离子相互作用。对于DNA阳离子和S-S键肽阳离子的电子碰撞，分别在4.5 eV和6 eV左右观察到电子捕获-解离产生的强共振。在激光照射下，研究了绿色荧光蛋白（GFP）发色团阴离子的光解离过程。光激发阴离子的寿命取决于离子的储存时间。这是由于前体的松弛过程。

Electron-ion and photon-ion interactions were studied for various biomolecules by using an electrostatic storage ring. For the electron collisions with DNA cations and S-S bonded peptide cations, strong resonances originated from electron-capture-dissociation were observed at around 4.5 and 6 eV, respectively. Furthermore, with the laser irradiation, photo-dissociation processes were studied for GFP(green fluorescent protein) chromophore anions. The lifetimes of photoexcited anions depend on the storage time of ions. This is due to the relaxation process of precursorions.