Collision between a moving particle and a second particle in which total kinetic energy and total momentum are conserved.
Note: In elastic scattering interactions, the moving particle can be deflected through angles of up to \(\pu{180\!^{\circ}}\).
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1799 (https://doi.org/10.1515/pac-2019-0404)