0
Pair production can only occur if the energy of the photon is bigger than the rest mass (E0 = m0*c^2) of electron and positron, because this is the energy needed to create these particle (conservation of energy). Excess energy will be kinetic energy of the electron and positron. Rest mass of electron and positron is 0.511 MeV each, so 1.022 MeV in total.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How many kilometers are in 1022 meters?
1000 meters = 1kmTo get from meters to km you need to divide by 1000.So 1022 meters is the same as 1.022 km.
What is MeV?
One MeV is one megaelectron volts or one million electron volts, and the MeV is a measure of energy. It is equal to 1.60217646 × 10-13 joules.
What is 1022 add 1028?
1022 add 1028 = 2050
How many hydrogens do you have to fuse together to make one helium?
None. Hydrogen and Helium are base elements.Helium is helium.Chemically yes, but with Nuclear Physics in stars:H + H --> D + e+ + v + 0.42 MeV, H + H --> D + e+ + v + 0.42 MeV, D + D --> He3 + n + 3.27 MeV (50%)H + H --> D + e+ + v + 0.42 MeV, H + H --> D + e+ + v + 0.42 MeV, D + D --> He3 + H + 4.03 MeV (50%)H + H --> D + e+ + v + 0.42 MeV, H + D --> He3 + gamma photon + 5.49 MeV, H + H --> D + e+ + v + 0.42 MeV, H + D --> He3 + gamma photon + 5.49 MeV, He3 + He3 --> He + H + H + 12.86 MeV (100%)H + D --> He3 + gamma photon + 5.49 MeV (100%)D + D --> He3 + n + 3.27 MeV (50%)D + D --> He3 + H + 4.03 MeV (50%)D + T --> He + n + 17.59 MeV (100%)T + T --> He + n + n + 11.33 MeV (100%)Four or two, depending on the kind of hydrogen isotope you are burning. As you can see in the equations above burning four ordinary atoms of hydrogen to ordinary helium is a complicated and slow process compared to burning two atoms of various isotopes of hydrogen, however a star has such tiny quantities of deuterium and tritium that depending on them for fusion helps little.
What is the quotient in 1022 divided by 13?
78.6154
How many MeV's are in one electron volt?
one MeV has 1,000,000 eVs So one eV has 0.000001 MeVs
What energy does uranium give?
Cca. 200 MeV for 1 atom of uranium. (MeV = mega electronvolt = 106 eV).
what is a MEV?
He's a rapper that is awesome
What is the muon's mass?
Muons decay by various methods, primarily, due to the weak interaction, into an electron and two neutrinos. The mass of the muon is 105.7 MeV/c2, with the mass of the electron being 0.511 MeV/c2, and the mass of the neutrino is less than 2.2 eV/c2. As a result, the loss of mass from muon decay, which is carried away as energy, is around 105.2 MeV/c2.
What does the MeV in MeV photon mean?
The MeV means million electron volts. It's a measure of the energy the energy in the photon, which is a quantum (or specific quantity) of electromagnetic energy. This 1 megaelectron volt = 1.60217646 × 10-13 joules of energy.
What is the energy of a photon with a frequecy of 1022 Hz?
The photon energy of 1022 Hz is 4.22664452E-12 electron volts.
How many volts are in 5 MeV?
5,000,000
