Spherically symmetric models for X-ray damage and the movement of electrons produced in non-spherically symmetric targets such as bio-molecules

Moribayashi, Kengo

We have developed a spherical symmetry model and an accurate model applied to the calculation of the damage of bio-molecules irradiated by X-ray free electron lasers (XFELs) for targets with shapes of a sphere and various ellipsoids. We discuss photo-electron impact ionization processes, energy losses of photoelectrons and the space distribution of free and quasi-free electrons. The electron distribution calculated by our spherical symmetry model agrees well with that calculated by our accurate model except for the place near the center in the spherical targets. The same tendency is shown at the ellipsoid targets with = 2 and 3 where is the ratio of the lengths of major axis with that of a minor one in the ellipsoid. Our spherical symmetry model can be applied to the target of one bio-molecule, that is, a lysozium.