[ RadSafe ] e: 10 rem from lightning?? (UNCLASSIFIED)

[Jeff Terry]

Please remember to use plain text email messages to prevent your  
messages from being bounced.

Begin forwarded message:
>
> From: Ted de Castro <tdc at xrayted.com>
> Date: March 30, 2010 12:27:27 PM CDT
> To: "Baumbaugh, Joel T CIV SPAWARSYSCEN-PACIFIC, 55430" <joel.baumbaugh at navy.mil 
> >
> Cc: "Borisky, Michael (Civ, ARL/ADLO)"  
> <michael.borisky at us.army.mil>, radsafe at health.phys.iit.edu
> Subject: Re: [ RadSafe ] 10 rem from lightning?? (UNCLASSIFIED)
>
>
> Yes - because the electrons are EMITTED with sufficient kinetic  
> energy - they don't have to gain that energy due to the influence of  
> an external field.
>
> On 3/30/2010 8:29 AM, Baumbaugh, Joel T CIV SPAWARSYSCEN-PACIFIC,  
> 55430 wrote:
>>
>> Mike,
>>
>> Go to any university laboratory with your trusty Pancake-GM and/or  
>> low energy Scintillation Probe and stand next to their P-32 waste  
>> (using P-32 betas for an example).  Even using plexi-glass for a  
>> shielding/container(a low-Z material) you're going to measure a  
>> "plethora" of bremsstralung x-rays on the outside of the  
>> container.  Google it, here's an example:
>>
>> http://en.wikipedia.org/wiki/Bremsstrahlung andhttp://dept.kent.edu/ORS/ORSContent/ORSBulletins/Rad/SB_P32.pdf
>>
>>
>> ...Joel
>>
>>
>> -----Original Message-----
>> From: Borisky, Michael (Civ, ARL/ADLO) [mailto:michael.borisky at us.army.mil 
>> ]
>>
>>
>> I thought that the only way electrons could reach relativistic  
>> speeds was in
>> the presence of a vacuum.  And I thought that relativistic speeds are
>> necessary to generate brem.
>>
>> Mike Borisky
>> ARL Radiation Safety
>>
>> -----Original Message-----
>> From: radsafe-bounces at health.phys.iit.edu
>> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of  
>> Baumbaugh, Joel T
>> CIV SPAWARSYSCEN-PACIFIC,55430
>> Sent: Tuesday, March 30, 2010 9:04 AM
>> To: Ted de Castro; radsafe at health.phys.iit.edu
>> Subject: [ RadSafe ] 10 rem from lightning??
>>
>> Of course you don't need a vacuum for Bremsstrahlung x-rays Ted...
>> Whether its generated from the plasma or (I'm guessing) mostly  
>> Compton
>> collisions w/air (elastic scattering w/molecular nitrogen)...
>>
>>
>>
>> Joel Baumbaugh
>>
>> SSC-Pacific
>>
>> San Diego, CA
>
>