home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky misc.consumers:16145 sci.environment:11078 sci.med:16874
- Path: sparky!uunet!pmafire!news.dell.com!swrinde!sdd.hp.com!ux1.cso.uiuc.edu!usenet.ucs.indiana.edu!bronze.ucs.indiana.edu!amirza
- From: amirza@bronze.ucs.indiana.edu (Anmar Caves)
- Newsgroups: misc.consumers,sci.environment,sci.med
- Subject: Re: "Small amounts" of radioactivy (was: Light Bulbs)
- Message-ID: <Bu2D1u.Eq8@usenet.ucs.indiana.edu>
- Date: 4 Sep 92 17:10:41 GMT
- References: <16857BEF1.M20614@mwvm.mitre.org> <Bu0sz3.sA@usenet.ucs.indiana.edu> <1992Sep3.231610.14654@cs.rochester.edu>
- Sender: news@usenet.ucs.indiana.edu (USENET News System)
- Organization: Indiana University
- Lines: 43
- Nntp-Posting-Host: bronze.ucs.indiana.edu
-
- In article <1992Sep3.231610.14654@cs.rochester.edu> dietz@cs.rochester.edu (Paul Dietz) writes:
- >In article <Bu0sz3.sA@usenet.ucs.indiana.edu> amirza@bronze.ucs.indiana.edu (Anmar Caves) writes:
- >
- > >Low level gamma radiation isn't nearly as bad for you as beta or
- > >alpha. According to Joe-Bobs school of survivalism, the problem with
- > >high-energy gamma is that it converts some of the calcium and
- > >phosphorus in your bones to different isotopes and they then emit
- > >alpha and beta radiation right into the bone marrow, causing leukemia.
- >
- >If this is the quality of the information from Joe-Bob, I suggest
- >you try to forget everything he said, as this is utter bullshit.
-
- I stand corrected and blame a faulty memory, and last night took a
- look at all that civil defense literature and the bone-absorption is
- due solely from taking in radioactive isotopes such as calcium and
- phosphorus, hence the recommended supplements. Don't blame Joe-Bob,
- he's more interested in results rather than why :-). I believe the
- primary effect of high amounts of ionizing radiation (aside from a
- slight heating effect which is negligable due to the short duty cycle)
- is a disruption of the neural processes of the CNS. Remember, I've
- wandered off subject from nuclear bananas to nuclear war.
-
- >Nuclear physics lesson time. Each isotope in your body has a
- >threshold energy below which the probability of a photonuclear
- >reaction is *zero*. The lowest such threshold for a stable isotope is
- >for beryllium-9 (1.6 MeV), the next, deuterium (2.26 MeV). In either
- >case the cross section is in the millibarns. To transmute the common
- >isotopes in your body at even a mediocre rate requires very energetic
- >gammas, in the 10-20 MeV range, to excite the "giant dipole
- >resonance". Even there simple scattering off electrons in your body
- >or pair production are more likely. The induced radioactivity
- >will give you a tiny fraction of the primary dose.
-
- Thanks for the physics lesson!
-
- >In food irradiation, the gammas are kept below about 4 MeV
- >to make activation completely negligible.
-
- --
- Anmar Mirza # Mayor of Dogspit, IN #My Opinions! NotIU's! #Purveyor of
- EMT-D # Located somewhere in # Legalize Explosives! #nontraditional
- N9ISY (tech) # the Outback of the #I've got my own fusion#family values
- Networks Tech.# Mirza Ranch.C'mon over#plant. Just ask me. #Space For Rent
-