Re: Airport screening and medicine

["Richard L. Hess" <lists@richardhess.com>]

Reuven and all,



I did this in 2002 and came up with an interesting plot showing about 25X 

the LA background level using an Aware RM-70 which is a small pancake G-M tube.



I have the flight plot at http://www.richardhess.com/be/radlog/



The file is named

             3-hr LAX-CHI.jpg



At the time I did this, the good folks here suggested that the G-M tube 

under-reports the high-energy cosmic ray particles.



Cheers,



Richard



At 01:26 PM 11/13/2004 -0800, you wrote:

>Sandy:

>

>I used the AWARE Electronics Model RM-60

>Micro Roentgen Radiation Monitor attached to Laptop PC.

>

>I tested it prior to the flight on a mammography machine and found it to 

>be quite accurate and reliable.

>

>Here in LA, the background radiation was measured to be, if my memory does 

>not fail me, to be

>around 10 microR/hour.

>

>Now, on what are you basing your statement " ... This does seem a bit 

>high. I travel quite

>a bit, and, I don't expect that I have observed the dose rates you  are 

>quoting..." ?

>

>Did you do such measurements?

>With what detector(s)?

>

>Reuven Zach

>

>========================================================

>

>

>----- Original Message ----- From: "Sandy Perle" <sandyfl@earthlink.net>

>To: <radsafe@list.vanderbilt.edu>; "M Nivas" <motnivas@YAHOO.COM>; "Brian 

>Rees" <brees@LANL.GOV>; "Reuven" <reuven99@newsguy.com>

>Sent: Saturday, November 13, 2004 12:51 PM

>Subject: Re: Airport screening and medicine

>

>

>>On 13 Nov 2004 at 12:03, Reuven wrote:

>>

>>>I once MEASURED the radiation dose during an intercontinental flight:

>>>It was *** 50 times *** HIGHER than the background radiation at sea

>>>level.

>>

>>Reuven,

>>

>>What did you use to measure the dose described above, and, what was

>>the duration of the flight?

>>

>>If one considers the natural background to be, for assumption

>>purposes, equals 7 microR/hr, then you're stating that the rate you

>>observed was 350 microR/hr. This does seem a bit high. I travel quite

>>a bit, and, I don't expect that I have observed the dose rates you

>>are quoting. Additional source information would be appreciated.

>>

>>----------------------------------------------------------------

>>Sandy Perle

>>Senior Vice President, Technical Operations

>>Global Dosimetry Solutions, Inc.

>>2652 McGaw Avenue

>>Irvine, CA 92614

>>

>>Tel: (949) 296-2306 / (888) 437-1714 Extension 2306

>>Fax:(949) 296-1144

>>

>>Global Dosimetry Website: http://www.dosimetry.com/

>>Personal Website: http://sandy-travels.com/

>

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>





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