Kaku meant that the FDs for brem and for pair prod have the same topology. What he meant by "rotate" is to change the physics of which particles come in and go out. Physically, brem and pp are very different.Buckeye said:In Chapter 6 of M. Kaku's book (QFT), he wrote (p184) "...by rotating the diagram around, we can convert bremsstrahlung into pair creation." Bremsstrahlung, as far as I know, involves atoms. Does this mean that when bremsstrahlung with >1.2 MeV strikes an atom we will get an electron and a positron?
Pair creation is a process in which a particle and its antiparticle are created from energy. Bremsstrahlung is a type of electromagnetic radiation emitted by a charged particle when it is decelerated.
Pair creation and bremsstrahlung are both processes that involve the creation or emission of particles. However, they are fundamentally different as pair creation involves the creation of a particle and its antiparticle from energy, while bremsstrahlung involves the emission of electromagnetic radiation by a charged particle.
Yes, pair creation and bremsstrahlung can occur simultaneously in certain situations. For example, in high-energy collisions between particles, both processes can occur at the same time.
Yes, both pair creation and bremsstrahlung follow the laws of conservation of energy and momentum. In pair creation, the total energy and momentum of the created particles must be equal to the energy and momentum of the original particle. In bremsstrahlung, the energy and momentum of the emitted radiation must be equal to the energy and momentum lost by the charged particle.
Understanding pair creation and bremsstrahlung is important in many areas of physics, including particle physics, astrophysics, and medical imaging. These processes can also be harnessed for practical applications such as in positron emission tomography (PET) scans, where pair creation is used to produce the positron emitting radiotracer, and in particle accelerators, where bremsstrahlung is used to produce high-energy photons for scientific research.