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What Kind of Photons are Used to Create Positron-Electron Pairs?
January 23, 2016 at 6:33 pm
We have established that photons are used in a particle collider to create e-p pairs. we have also established that once created, if these pairs come together they annihilate each other and gamma rays are the product of this annihilation.
but gamma rays are, to my understanding, a type of photon. so what type of photon is used to create the pair?
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 23, 2016 at 7:17 pm
Gamma rays.
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 23, 2016 at 7:48 pm
I love it when you talk dirty.
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 23, 2016 at 8:52 pm
I feel unclean . . .
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 23, 2016 at 8:59 pm
I'm on the phone, so I'm gonna let uncle k take care of this...
As far as I'm aware there's only one kind of photons... But they are grouped according to the photon's energy.
Microwaves, infrared, visible, ultraviolet, x-rays, gamma rays, cosmic waves
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 24, 2016 at 12:47 pm
(January 23, 2016 at 8:59 pm)pocaracas Wrote: I'm on the phone, so I'm gonna let uncle k take care of this...
As far as I'm aware there's only one kind of photons... But they are grouped according to the photon's energy.
Microwaves, infrared, visible, ultraviolet, x-rays, gamma rays, cosmic waves
Yes, those are the 7 frequencies of photons I’m looking for. It would add a new dimension to my novel if as, vorlon says, gamma rays are involved in the creation as well as the annihilation of particle pairs.
The god who allows children to be raped out of respect for the free will choice of the rapist, but punishes gay men for engaging in mutually consensual sex couldn't possibly be responsible for an intelligently designed universe.
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 24, 2016 at 2:46 pm
(This post was last modified: January 24, 2016 at 2:50 pm by Fireball.)
(January 24, 2016 at 12:47 pm)Rhondazvous Wrote: (January 23, 2016 at 8:59 pm)pocaracas Wrote: I'm on the phone, so I'm gonna let uncle k take care of this...
As far as I'm aware there's only one kind of photons... But they are grouped according to the photon's energy.
Microwaves, infrared, visible, ultraviolet, x-rays, gamma rays, cosmic waves
Yes, those are the 7 frequencies of photons I’m looking for. It would add a new dimension to my novel if as, vorlon says, gamma rays are involved in the creation as well as the annihilation of particle pairs.
vorlon13 is correct. Also, a photon's energy is dependent on its wavelength. The "7 frequencies" you are referring are actually a broad range that cover many actual frequencies.
https://en.wikipedia.org/wiki/Electromagnetic_spectrum
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 24, 2016 at 2:48 pm
(This post was last modified: January 24, 2016 at 2:53 pm by Alex K.)
Frequency is a continuum, these 7 categories are arbitrary definitions and do not reflect anything like separate kinds of particle in nature. All you need for pair production is enough juice, so... The energy of the two photons together needs to be greater than 1.022 Megaelectronvolts. Photons of such high energies are often called gamma particles, but that's just a name for photons with lots of juice. In particular, the same photon can have completely different energies for different observers depending on how fast they move, so it is not a well defined property.
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RE: What Kind of Photons are Used to Create Positron-Electron Pairs?
January 24, 2016 at 2:58 pm
Thanks, The plot thickens.
The god who allows children to be raped out of respect for the free will choice of the rapist, but punishes gay men for engaging in mutually consensual sex couldn't possibly be responsible for an intelligently designed universe.
I may defend your right to free speech, but i won't help you pass out flyers.
Those who can make you believe absurdities, can make you commit atrocities.
--Voltaire
Nietzsche isn't dead. How do I know he lives? He lives in my mind.
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