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The minium required energy of a photon that is involved in the creation of an electron-positron pair (which is pair production), is 1.022 MeV.
An electron-positron pair has a given probability of being produced when a photon of the stated energy (or a higher energy) passes close the nucleus of an atom. Pair production does not happen "in the presence of a photon" but happens as a direct result of the the actual presence of a photon (having at least the stated energy) in the presence of an atomic nucleus. The presence of an atomic nucleus is necessary to insure conservation of the quantum mechanical characteristics of the event. Said another way, the high energy photon alone cannot spontaneously create the electron-positron pair in pair production. A link can be found below to related questions.
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What is the energy needed to remove electrons from an atom called?
ionization potential energy. but remember the atom must be neutral .
What is sulfurs ionization energy?
Sulfer's ionization energy is 32.066
What is the ionization energy for Ar?
Argon's ionization energy is 39.948
What is the ionization energy of mercury?
Mercury's ionization energy is 24.10
Does noen have ionization energy?
Neon's ionization energy is 20.1397
What is the energy needed to remove electrons from an atom called?
ionization potential energy. but remember the atom must be neutral .
Which elements on periodic table have the highest ionization energies?
Helium (He) has the highest ionization energy.
Is fire an ionization energy?
No fire is not an ionization energy
What is the energy needed for ionization called?
ionization energy
What are examples of ionization energy?
Tins ionization energy is 118.10
What is sulfurs ionization energy?
Sulfer's ionization energy is 32.066
What is the ionization energy of mercury?
Mercury's ionization energy is 24.10
What is the ionization energy for Ar?
Argon's ionization energy is 39.948
Does noen have ionization energy?
Neon's ionization energy is 20.1397
What has the largest ionization energy?
Helium has the highest ionization energy.
What is ionization energy of oxygen?
Oxygen's ionization energy is 15.9994
Which energy is the energy that can be taken to remove an electron form its shell?
This energy is called ionization energy and is different for each chemical element.
