4. An proton-antiproton pair is produced by a 2.05 x 10³ MeV photon. What is the kinetic energy of the antiproton if the kinetic energy of the proton is 43.45 MeV? Use the following Joules-to-electron-Volts conversion 1eV = 1.602 × 10-19 -27 The rest mass of a proton is 1.67 × 10- kg. MeV ssf600 ss ( f60 ssfossfore. f60 ssf60 sf60 ssf60

4. An proton-antiproton pair is produced by a 2.05 x 10³ MeV photon. What is the kinetic energy of the antiproton if the kinetic energy of the proton is 43.45 MeV? Use the following Joules-to-electron-Volts conversion 1eV = 1.602 × 10-19 -27 The rest mass of a proton is 1.67 × 10- kg. MeV ssf600 ss ( f60 ssfossfore. f60 ssf60 sf60 ssf60

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter11: Particle Physics And Cosmology

Section: Chapter Questions

Problem 73AP: A proton and an antiproton collide head-on, with each having a kinetic energy of 7.00 TeV (such as...

See similar textbooks

Similar questions

The average particle energy needed to observe uni?cation of forces is estimated to be 1019 GeV. (a) What is the rest mass in kilograms of a particle that has a rest mass of (b) How many times the mass of a hydrogen atom is this?
(a) A panicle and its antiparticle are at rest relative to an observer and annihilate (completely destroying both masses), creating two y rays of equal energy. What is the characteristic y -ray energy you would look for if searching for evidence of proton-antiproton annihilation? (The fact that such radiation is rarely observed is evidence that there is very little antimatter in the universe.) (b) How does this compare with the 0.511-MeV energy associated with electron-positron annihilation?
The peak intensity of the CMBR occurs at a wavelength of 1.1 mm. (a) What is the energy in eV at a 1.1mm photon? (b) There are approximately 109 photons for each massive particle in deep space. Calculate the energy of 109 such photons. (c) If the average massive particle in space has a mass half that of a proton, what energy would be created by convening its mass to enemy? (d) Does this imply that space is “matter dominated”? Explain briefly.
Integrated Concepts The primary decay mode for the negative pion is (a) What is the energy release in MeV in this decay? (b) Using conservation of momentum, how much energy does each of the decay products receive, given the is at rest when it decays? You may assume the muon antineutrino is massless and has momentum just like a photon.
. If the average lifetime of a proton was 1033 years, about how many protons would you have to assemble together and observe simultaneously to witness a total of 100 proton decays in one year? Explain the reasoning that led to your conclusion.
The intensity of cosmic ray radiation decreases rapidly with increasing energy, but there are occasionally extremely energetic cosmic rays that create a shower of radiation from all the particles they create by striking a nucleus in the atmosphere. Suppose a cosmic ray particle having an energy of 1010 GeV converts its energy into panicles with masses averaging 200MeV/c2. (a) How many particles are created? (b) If the particles rain down on a 1.00-km2 area, how many particles are there per square meter?
A proton and an antiproton collide head-on, with each having a kinetic energy of 7.00 TeV (such as in the LHC at CERN). How much collision energy is available, taking into account the annihilation of the two masses? (Note that this is not significantly greater than the extremely relativistic kinetic energy.)
Is the decay possible considering the appropriate conservation laws? State why or why not.
When an electron and positron collide at the SLAC facility, they each have 50.0 GeV kinetic energies. What is the total collision energy available, taking into account the annihilation energy? Note that the annihilation energy is insignificant, because the electrons are highly relativistic.
Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton decays in a tank of water. (a) How many kilograms of water would you need to see one decay per month, assuming a lifetime of 1031 y? (b) How many cubic meters of water is this? (c) If the actual lifetime is 1033 y, how long would you have to wait on an average to see a single proton decay?
(a) Estimate the mass of the luminous matter in the known universe, given there are 1011 galaxies, each containing 1011 stars of average mass 1.5 times that of our Sun. (b) How many protons (the most abundant nuclide) are there in this mates? (c) Estimate the total number of particles in the observable universe by multiplying the answer to (b) by two, since there is an electron for each proton, and then by 109, since there are far more particles (such as photons and neutrinos) in space than in luminous matter.
Integrated Concepts Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton decays in a tank of water. (a) How many kilograms of water would you need to see one decay per month, assuming a lifetime of 1031 y? (b) How many cubic meters of water is this? (c) If the actual lifetime is 1033 y, how long would you have to wait on an average to see a single proton decay?