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For the first time scientists measured the vibrational structure of hydrogen and helium atoms by X-rays. The results disprove the misconception that it's impossible to obtain X-ray photoelectron spectroscopy (XPS) spectra of hydrogen and helium, the two lightest elements of the Periodic Table. This was thought to be the case due to low probabilities of electron ejection from these elements induced by X-rays.
Unparalleled beam brightness at the National Synchrotron Light Source-II significantly increases the probability of a photon colliding with a gas atom at ambient pressures. The beamline makes it possible to use XPS to directly study the two most abundant elements in the universe.
Work - Limits - XPS - Scope - Techniques
Also, this work helps describe the limits of XPS, opening a broader scope for one of the most useful techniques in materials science.
X-ray photoelectron spectroscopy (XPS) is one of the most powerful techniques in...
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