[ RadSafe ] Beat phenomena and health physics
prestwic at mcmaster.ca
Tue Feb 24 08:23:32 CST 2015
I think, since photons are emitted randomly, that the interference effects
that occur with electrically produced sinusoids are not significant.
From: radsafe-bounces at agni.phys.iit.edu
[mailto:radsafe-bounces at agni.phys.iit.edu] On Behalf Of JPreisig at aol.com
Sent: Sunday, February 22, 2015 10:57 PM
To: radsafe at agni.phys.iit.edu
Subject: [ RadSafe ] Beat phenomena and health physics
The phenomena of beats (see your undergraduate text in
physics/mechanics) involves what happens when 2 or more fundamental
frequencies of a system are close in frequency (or Energy) to one another.
Two such sinusoidal signals (or more) produce sum and difference
frequencies, which can be important in problems.
I've been discussing beats concerning the fundamental wobble
frequencies. I also said something perhaps about beats and the Sodium
Another situation where beats might be important is in health physics
and perhaps even physics. We Health Physicists measure gamma and other
spectra using a MultiChannel Analyzer and similar equipment. There may be
times when our gamma spectra have peaks that are close to one another and
may produce beat (sum and difference frequency) peaks. Do we observe such
peaks in our spectra??? Will these beat phenomena affect our physics
results??? Quite possibly. These extra peaks may affect spectral
stripping and other results.
Remember, E = h x nu, where nu is the frequency in atomic and/or
Perhaps physicists doing sensitive experiments account for such beat
phenomena. I don't remember hearing about beat phenomena in my Health
Physics courses. I first heard about beat phenomena in a physics course or
two. Then I heard about it again in geophysics research.
Beat phenomena might affect our every day Health Physics work??? Oh
I seem to remember Cesium-137 having closely spaced decay (energy)
Regards, Joe Preisig
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