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Topic: 18F to 18O  (Read 5859 times)

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Offline Nescafe

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18F to 18O
« on: October 08, 2012, 06:21:51 PM »
Hi,

Fluorine 18 decays to O 18 upon releasing a positron. I understand that Fluorine18 has 9electrons, 9 neutrons and 9 protons. Upon decaying it releases a proton? and an electron? gaining a neutron? I am making this assumption because Oxygen18 has 8 protons 8 electrons and 10 neutrons so in order for 18F to decay to 18O this must happen. Can someone please confirm this?

Positron is an electron of opposite charge, this is equivalent to saying a proton no?

Offline Arkcon

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Re: 18F to 18O
« Reply #1 on: October 08, 2012, 06:45:58 PM »
Positron emission occurs when a nuclear proton converts into a neutron.  See here:  http://en.wikipedia.org/wiki/Positron_emission#Emission_mechanism  Or at any rate, that's the model that we're using to describe the process.  A positron isn't a proton, no.
« Last Edit: October 08, 2012, 08:44:56 PM by Arkcon »
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline Nescafe

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Re: 18F to 18O
« Reply #2 on: October 08, 2012, 08:00:11 PM »
Righ on. That explains the loss of proton and gain of neutron but still doesnt explain how it converts into 18O as it also needs to lose an electron going from 18F to 18O.

Nescafé.

Offline gippgig

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Re: 18F to 18O
« Reply #3 on: October 08, 2012, 11:54:59 PM »
The immediate product of positron decay of 18F is a negatively charged 18O ion (8 protons, 10 neutrons, 9 electrons), but nobody worries about the extra electron - that's chemistry, not nuclear physics.

Offline Borek

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Re: 18F to 18O
« Reply #4 on: October 09, 2012, 02:39:04 AM »
Don't worry about electrons, they will deal with the situation on their own ;)
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Offline Nescafe

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Re: 18F to 18O
« Reply #5 on: October 09, 2012, 11:01:34 PM »
Don't worry about electrons, they will deal with the situation on their own ;)

Haha, but but but, its all lonely.....alright :) thanks!

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