# Wide-angle X-ray scattering (WAXS) spectroscopy

## Summary:

I read the "J. Phys. Chem. B 2018, 122, 7616−7624" where they calculated the pair distribution function using wide-angle X-ray scattering and mentioned the term "a large momentum
transfer of 23 Å−1".
I read the "J. Phys. Chem. B 2018, 122, 7616−7624" paper where they calculated the pair distribution function using wide-angle X-ray scattering and mentioned the term " The distances to the first coordination shell for low-, high-, and very-high-density amorphous ice (LDA, HDA, VHDA) were determined to be 2.75, 2.78, and 2.80 Å, respectively, with high accuracy due to measurements up to a large momentum transfer of 23 Å−1 ". Can anybody help me in understanding the term? How the range of momentum