(no subject)

[chess]

Oh, and there was the small matter of a Physics exam sometime in the morning. I think it went kinda okay, although there was an annoying question on radiation - I could think of all kinds of reasons why the count rate might have been *lower* than it was meant to be, but they were all higher, so my answer was a bit pathetic really. I *hate* 5-mark questions, I think they just have something against me.

Looking through the moods I think this is a particularly good one for me going on about not being good enough at Physics...

Comments

Re: Higher counts ...

[passage.livejournal.com]

True Gamma source only emitters are pretty rare (read: they bascially don't exist) as they are not really involved in decays, only in changing the energy of the nucleus. Thus gamma decay typically occurs during alpha or beta decay if the nucleus produced is too energetic.

However, that is a strange question as I would have also expected to read lower, did it say how detection was carried out (the calultion is mathematical so I still think background radiation is the value they're after).

Neil

Re: Higher counts ...

[chess]

It didn't say anything at all about how detection was carried out either time - it said that the tracer was being used to measure blood flow in the heart.