1. The threshold amount of the required energy is known as ionization potential . 2. The ionization potential is determined experimentally at 11 to 13.5 electronvolts. 3. Xenon propellant is used because of its high atomic weight and low ionization potential . 4. Alfv�n writes that the ionization potential of the gas, V ion, occurs when: 5. In 1998, Sakurai and Castleman measured ionization potentials of via near threshold photoionization spectroscopy. 6. A temperature gradient within the plasma will also cause chemical separation based on different ionization potentials . 7. It has the lowest thermal conductivity and lowest ionization potential of all the non-radioactive noble gases. 8. Where the ionization potential is typically 7-9 eV for organic materials and 4-5 eV for metals. 9. The ionization potential of noble gases in their lowest excited state is close to the electron affinity of halogen atoms. 10. Argon is a typical background gas because it has low ionization potential and therefore is easier to break down and sustain.