- #1

- 2,637

- 786

Probably a basic question in this field but I haven't been able to find the answer upon internet search.

Suppose I send a beam consisting of protons and positrons with a given momentum into a cloud chamber, how can then I tell them apart?

My own rough guess:

Suppose the two particles undergo the same amount of energy loss upon traversing the lead plate inside the chamber then the momentum after the plate will be ##p_i' = \sqrt{p_i^2 - 2m_i \Delta E}## where ##i = 1,2## denoting the indices of each particle and ##\Delta E## is the energy loss. ##p## is the initial momentum which is the same for both particle. Hence the radius of the trajectory is different after the plate despite the are the same before traversing it. Is it true?

Suppose I send a beam consisting of protons and positrons with a given momentum into a cloud chamber, how can then I tell them apart?

My own rough guess:

Suppose the two particles undergo the same amount of energy loss upon traversing the lead plate inside the chamber then the momentum after the plate will be ##p_i' = \sqrt{p_i^2 - 2m_i \Delta E}## where ##i = 1,2## denoting the indices of each particle and ##\Delta E## is the energy loss. ##p## is the initial momentum which is the same for both particle. Hence the radius of the trajectory is different after the plate despite the are the same before traversing it. Is it true?

Last edited: