Soft X-ray absorption spectroscopy in the low-energy region explored using an argon gas window

In this study, the argon gas window is   proposed as a new soft X-ray transmission window in the low-energy region. High-order X-rays are removed by the absorption of the Ar L-edge (240   eV), and first-order X-rays become the major contribution of transmitted soft X-rays in the low-energy region. Under atmospheric argon conditions, the double-excitation Rydberg series of helium gas (60   eV), Si L-edge XAS of an Si3N4 membrane (100   eV) and S L-edge XAS of dimethyl sulfoxide gas (170   eV) are successfully measured, indicating that the argon gas window is effective for soft X-ray transmission in the low-energy region from 60   eV to 240   eV.

Source: Journal of Synchrotron Radiation - May 26, 2020 Category: Physics Authors: Nagasaka, M. Tags: soft X-ray absorption spectroscopy low-energy region argon gas window atmospheric conditions research papers Source Type: research