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RE: [cdn-nucl-l] Explaining Food Irradiation
I read that
part about the 5 MeV -- I believe it refers to the electrons in the beam hitting
the metal target which, in turn, produces the X-rays.
same point bothered me. But later on in the article, they say that the
x-ray energy is 5 Mev or so, which is in fact considerably higher than Cs-137
(670 kev) and Co-60 (<1.4 Mev). I guess what they are calling "x-rays"
are really bremsstrahlung
At 01:11 PM 8/3/2003, Franta, Jaroslav wrote:
I find one item in the article a bit confusing:
Today, though, gamma rays are being superseded for food safety by two
other kinds of radiation: electron beams (e-beams) and X-rays. .....gamma rays
are useless for irradiating items like whole chickens. It turns out there is
no speed at which a conventional conveyor could move to kill interior microbes
without overexposing outer
portions of the meat......The future of food irradiation seems to
belong to e-beams and X-rays. .... X-rays
penetrate deeper into food.
...if gammas don't
penetrate deep enough, then X-rays certainly don't either !
Gammas are definitely
more penetrating than X-rays.
This sounds like propaganda for (from ?) electron-beam
accelerator manufacturer, SureBeam Corp. ( who use e-beams to produce
Brehmstrahlung X-rays, in their
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