[ RadSafe ] Gamma background radiation at ground level

[Felipe Gaitan]

Mike - What's the relative increase (%) in these two examples? Thanks, Felipe


On Feb 23, 2011, at 6:21 AM, McNaughton, Michael wrote:

> There is a similar system at Los Alamos: newnet.lanl.gov (without www). 
> 
> Regarding cosmic rays, I have studied the data during supernovas, solar flares, etc., and the most I have ever seen at ground level is an increase of about 0.5 micro-R per hour; the atmosphere is a good shield, even at an altitude of 7500 feet. 
> 
> Almost all the variations that we observe are caused by radon decay products (Bi-214 etc.) Sometimes, during a rain or snow storm, we observe an increase of as much as 10 micro-R per hour. We know it is caused by radon decay products because it decays with the expected combination of half lives.
> 
> mike
> 
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of GEOelectronics at netscape.com
> Sent: Tuesday, February 22, 2011 6:17 PM
> To: radsafe at health.phys.iit.edu
> Subject: [ RadSafe ] Gamma background radiation at ground level
> 
> "Dear Radsafers - Does anybody know where I can get day to day (or hourly) gamma background (cosmic) and/or neutron readings at ground level? A station near California, USA, would be ideal but I'll take anything. Thanks in advance, 
> D. Felipe Gaitan, Ph.D."
> 
> http://www.cemp.dri.edu/
> 
> 
> The above link is to the Community Environmental Monitoring Program
> by the DOE and Desert Research Institute here in Las Vegas. The instrumentation is
> by Reuter Stokes with the basketball sized sensors (PIC).
> 
> There are other such programs out there too, including a grass roots network of
> BlackCat Systems detectors. 
> 
> 
> Good luck with your research
> 
> George Dowell
> New London Nucleonics Lab
> GEOelectronics at netscape.com
> 
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D. Felipe Gaitan, Ph.D.
Chief Research Scientist
Impulse Devices, Inc.
13366 Grass Valley Av.  Unit H
Grass Valley, CA  95945
Phone: 530-273-6500 Ext. 112
Fax:  530-273-6566
email: gaitan at impulsedevices.com
website: http://impulsedevices.com







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