- #1

Michel_vdg

- 107

- 1

*only a small fraction is available for interaction*'. How can that be, why isn't all energy 'effective'?

*"The energy of this particle is some 40 million times that of the highest energy protons that have been produced in any terrestrial particle accelerator. However, only a small fraction of this energy would be available for an interaction with a proton or neutron on Earth, with most of the energy remaining in the form of kinetic energy of the products of the interaction.*

The effective energy available for such a collision is the square root of double the product of the particle's energy and the mass energy of the proton, which for this particle gives 7.5×10

The effective energy available for such a collision is the square root of double the product of the particle's energy and the mass energy of the proton, which for this particle gives 7.5×10

^{14}eV, roughly 50 times the collision energy of the Large Hadron Collider."*Source: http://en.wikipedia.org/wiki/Ultra-high-energy_cosmic_ray*