When an atom is struck by a high-energy electron, the electron can transfer its energy to the atom's electrons, causing them to become ionized. The ionization energy is the minimum amount of energy that must be transferred to an electron in order to free it from the atom.
The ionization energies of atoms have been measured experimentally for many elements, but these measurements can be difficult and time-consuming. Theoretical methods for calculating ionization energies are therefore essential for understanding the properties of atoms and molecules in extreme environments.
The new method, developed by researchers at the University of California, Berkeley, is based on a quantum-mechanical approach known as density functional theory (DFT). DFT is a widely used method for calculating the properties of materials, but it has typically been less accurate for calculating ionization energies than other methods.
The researchers overcame this limitation by developing a new way to represent the wavefunction of the ionized electron. This new representation, which is based on a mathematical technique known as the B-spline method, allows for a more accurate description of the electron's motion near the nucleus.
The researchers tested their new method on a variety of atoms, including helium, neon, argon, and krypton. They found that their method was more accurate than previous DFT methods, and in some cases, it even outperformed more sophisticated methods that are computationally more expensive.
The new method is expected to be useful for a variety of applications in high-energy physics and astrophysics, including the study of ionization processes in plasmas, the atmospheres of stars, and the interactions of atoms with interstellar radiation.
