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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.
What else can I help you with?
What is the energy needed to remove electrons from an atom called?
ionization potential energy. but remember the atom must be neutral .
Does noen have ionization energy?
Neon's ionization energy is 20.1397
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.
What is ionization energy of boron?
Across a row on the periodic table ionization energy increases. Down a column, ionization energy decreases. --------------------------------------------------------- The first Ionization energy of Boron is 800.6 kJ mol-1
What is ionization energy and which element has the lowest ionization energy?
The energy required for an element to ionize and helium has the lowest.
What is the energy needed for ionization called?
The energy needed for ionization is called ionization energy. It is the minimum amount of energy required to remove an electron from an atom or molecule in its gaseous state.
The energy required to remove electrons from an atom is called?
The energy required to remove electrons from an atom is called ionization energy. It is the minimum energy needed to remove an electron from a neutral atom in the gaseous phase.
What is the energy needed to remove electrons from an atom called?
ionization potential energy. but remember the atom must be neutral .
Is fire an ionization energy?
No fire is not an ionization energy
What is Argon Ionization Energy?
Argon ionization energy is the amount of energy required to remove an electron from a neutral argon atom to produce a positively charged ion. In the case of argon, this energy is relatively high due to its stable electron configuration.
Does noen have ionization energy?
Neon's ionization energy is 20.1397
What are examples of ionization energy?
Tins ionization energy is 118.10
What has the largest ionization energy?
Helium has the highest ionization energy.
What is the relationship between the work function and ionization energy in the context of electron emission from a material?
The work function is the minimum energy needed to remove an electron from a material, while the ionization energy is the energy required to remove an electron from a neutral atom. The work function is typically equal to or greater than the ionization energy, as it accounts for the additional energy needed to overcome the attractive forces within the material.
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.
Does Kr have high ionization energy or low ionization energy?
high
Does Rb have a high ionization energy or low ionization energy?
Low
