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Re: [Phys-l] Geiger counter

I suspect the units were mSv/hr. But the numbers could also refer to dose densities actually received by pilots, when they were flying. In that case mSv would be OK.

Ludwik
==============



On Mar 28, 2011, at 12:39 PM, brian whatcott wrote:

Here's a lift of the Greenpeace para on radiation there:

"Levels above reactors reported as 4.13 "mSv" at 1000 feet and 87.7
"mSv" at 300 feet. The statements by the government and the Tepco
spokespeople seem to contradict the reported values. The helicopters are
equipped with lead panels and crews wearing protective gear, but were
unable to hover above the reactors to improve accuracy and had to pull
back after only 15 minutes, yet the government-authorised emergency dose
limit of 250 mSv/h would allow the crews to stay at 1000 feet for 48
hours, even without shielding.

"Ibaraki's
<http://www.knoxnews.com/news/2011/mar/16/battle-is-just-beginning-says-nuclear-reactor/ >
(130 km south of Dalichi) radiation readings on Tuesday just before the
monitors went "under survey" are posted online. The readings measure at
3.4 micro-Sv/h = 30 milli-Sv per year. Current value is 0.92 micro- Sv/h
= 8 mSv/y. In Saitama and Tochigi, close to Tokyo, readings of 1.2 and
1.3 microSv/h were measured yesterday."

Brian W

On 3/28/2011 11:06 AM, Kyle Forinash wrote:
Speaking of Geiger counters ... does anyone have a link or information
about the actual radiation counts in Japan? The New York times mentioned
a 1000 milli Sievert measurement of leaking water yesterday but I
haven't seen many actual numbers. They have said things like 1/88 th of
a chest x-ray etc. but actual measurements? How "hot" is the food that
is being taken off the market?

------------------------------

Message: 2
Date: Mon, 28 Mar 2011 10:06:08 -0400
From: "Anthony Lapinski"<Anthony_Lapinski@pds.org>
Subject: [Phys-l] Geiger counter
To: tap-l@lists.ncsu.edu, phys-l@carnot.physics.buffalo.edu
Message-ID:<fc.000f5474028ec60a000f5474028ec60a.28ec73f@pds.org>
Content-Type: text/plain; charset=ISO-8859-1

With the nuclear plant disaster in Japan, I wanted to get a Geiger counter
to show my students. I have an old/yellow deflection type (not sure it
even works). I am looking for a "modern" one, relatively small, with audio
clicks, and maybe a digital display. Does anyone know of "good" models on
the market, companies that sell them, and approximate costs?




------------------------------

Message: 3
Date: Mon, 28 Mar 2011 10:14:24 -0400
From: ludwik kowalski<kowalskil@mail.montclair.edu>
Subject: Re: [Phys-l] Geiger counter
To: Forum for Physics Educators<phys-l@carnot.physics.buffalo.edu>
Message-ID:<9968A668-7D6F-4A2B-B176-562F873B1346@mail.montclair.edu>
Content-Type: text/plain; charset="us-ascii"

Look at this:

http://www.scientrific.com.au/product.php?p=4015&PHPSESSID=e43a82185717c372c35e24b35d804dc0

Ludwik
==========================


On Mar 28, 2011, at 10:06 AM, Anthony Lapinski wrote:

With the nuclear plant disaster in Japan, I wanted to get a Geiger
counter
to show my students. I have an old/yellow deflection type (not sure it
even works). I am looking for a "modern" one, relatively small, with
audio
clicks, and maybe a digital display. Does anyone know of "good"
models on
the market, companies that sell them, and approximate costs?


_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html


-------------- next part --------------



------------------------------

Message: 4
Date: Mon, 28 Mar 2011 08:02:52 -0700
From: Elizabeth Kennedy<eak5r@virginia.edu>
Subject: Re: [Phys-l] Geiger counter
To: Forum for Physics Educators<phys-l@carnot.physics.buffalo.edu>
Message-ID:
<AANLkTikvzmVtYtXf_0S5XQjshUxwE4=HYL20ZOyzJ+T1@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

If you happen to already use the PASCO interfaces in your class, check out:

http://store.pasco.com/pascostore/showdetl.cfm?&DID=9&PartNumber=SN-7927A&groupID=162&Detail=1
Elizabeth Kennedy

On Mon, Mar 28, 2011 at 7:06 AM, Anthony Lapinski
<Anthony_Lapinski@pds.org>wrote:

With the nuclear plant disaster in Japan, I wanted to get a Geiger counter
to show my students. I have an old/yellow deflection type (not sure it
even works). I am looking for a "modern" one, relatively small, with audio
clicks, and maybe a digital display. Does anyone know of "good" models on
the market, companies that sell them, and approximate costs?


_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l

------------------------------

Message: 5
Date: Mon, 28 Mar 2011 08:20:24 -0700
From: "M. Horton"<scitch@verizon.net>
Subject: Re: [Phys-l] Geiger counter
To: "Forum for Physics Educators"<phys-l@carnot.physics.buffalo.edu>
Message-ID:<FE554C4DF41D4BCDA6A1C5BEEF104FBB@mike2>
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original

It's even cheaper on the Vernier website:
http://www.vernier.com/probes/drm-btd.html

Mike

----- Original Message -----
From: "ludwik kowalski"<kowalskil@mail.montclair.edu>
To: "Forum for Physics Educators"<phys-l@carnot.physics.buffalo.edu>
Sent: Monday, March 28, 2011 7:14 AM
Subject: Re: [Phys-l] Geiger counter


Look at this:

http://www.scientrific.com.au/product.php?p=4015&PHPSESSID=e43a82185717c372c35e24b35d804dc0

Ludwik
==========================


On Mar 28, 2011, at 10:06 AM, Anthony Lapinski wrote:

With the nuclear plant disaster in Japan, I wanted to get a Geiger
counter
to show my students. I have an old/yellow deflection type (not sure it
even works). I am looking for a "modern" one, relatively small, with
audio
clicks, and maybe a digital display. Does anyone know of "good"
models on
the market, companies that sell them, and approximate costs?


_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html





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_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l



__________ Information from ESET Smart Security, version of virus
signature database 5993 (20110328) __________

The message was checked by ESET Smart Security.

http://www.eset.com


__________ Information from ESET Smart Security, version of virus signature database 5993 (20110328) __________

The message was checked by ESET Smart Security.

http://www.eset.com





------------------------------

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l


End of Phys-l Digest, Vol 74, Issue 26
**************************************

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l

Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html