****** GLP RADIATION REPORTING CENTER ******

Basic Radiation Detector Systems:
What do you want to know about the radiation?
Energy?
Position (where did it come from)?
How many / how much?

Important properties of radiation detectors
(depends on application)
Energy resolution
Spatial resolution
Sensitivity
Counting Speed

Get the PDF: [link to depts.washington.edu]

Last Edited by Programmer on 03/15/2011 02:04 PM

Hamilton MT
elevation 3500 ft
1 cps
0309 3/14/2011

Assuming you mean s = seconds that would give us: 60 cps == 1 CPM, is that what you're finding? Also thanks, welcome aboard.

Last Edited by Programmer on 03/19/2011 12:15 PM

Not exactly sure. just took the gieger counter out of the disater cart here in the ER. it told us 1 per second. i would assume your conversion is correct. it seems to me that i might get a more accurate reading with minutes, because of such a low reading. i will try again some other time.

Make and model please.

Last Edited by Programmer on 03/14/2011 05:30 AM

images scientific instuments
model gca-04
It has option to change to minutes or 5 minutes.
i was not taking the original reading, but will take one now

Cool, never seen one of those before. Sounds like a badass disaster cart. The meter looks nice. [link to ecx.images-amazon.com] Apparently it's programmable, but the scale toggle is on the front so yes try flipping it to 1 minute.

Last Edited by Programmer on 03/14/2011 05:35 AM

ok i took a minute long reading that came to 22 counts the first time and 27 the second. now i will read the manual that came with this to learn more. hope this help you.
Does this make me a giegertard?

Added to top post! Also good job doing multiple passes. Did you do a free-air test where you hold the probe up outside?

both tests were done outside in an open enviroment.

This thread is all win. Thank you folks!

Looks like Pro-Gear you've got. [link to www.imagesco.com]

Nice to be at a hospital with access to the disaster gear like the positive pressure HAZMAT suits.

Last Edited by Programmer on 03/14/2011 05:50 AM

+1

We also have a decontamination/ treatment area with a negative or positive hepa filtraion + separate septic. Hamilton MT is home to Rocky mountain labs, which is a level 4 fedral lab. they study all kinds of nasty stuff there. Hope i never have to use any of this stuff for real.

I have linked to this thread from [link to www.godlikeproductions.com]

keep it going!

Hitachinaka City Hitachinaka 303 303 東南東 East-southeast



[link to translate.google.com]

Radiation Levels.. PLEASE WATCH.. REFRESH AFTER 15 MINUTES. Levels just jumped to above 300 in some places.

[link to translate.google.com]

IF this link can be debunked.. please do so.. IF NOT, HOLY HELL!

This thread will need to be pinned for years, I think.

forever..

I am running a similar thread from the East Coast. I work in a lab with a Geiger counter. I will post all info over to here and if you would do likewise.

Thread: I HAVE A GEIGER COUNTER HERE IN MY LAB, PLEASE READ…

I believe that these are hourly readings, not CPM. The areas of concern, however, are "under inspection." This means we likely won't know anything until more locations require "inspection." Then it'll be too late (for them).

Howdy! Feel free to use any data from this thread in your thread. The more the merrier. I am glad this one isn't pinned since we have no coast-state stations yet. If you get any people on the west coast with data on your roster I'll vote to pin your thread.

Thanks for your effort centrist77.

Oh, and they are in nano-grays. So, while even 300 is higher than normal, from what I've read (at GLP, thankyou) this won't kill you.

Here's a good post summarizing the various differences...

...


this 7400 nGy becomes 7.4000 mGy

would that make less than 1 rad?

someone help me with the math
thanks

Quoting: Anonymous Coward 1294751


I think it is 7.4 rads
go here and use this free online conversion program:
[link to www.aqua-calc.com]

Quoting: Anonymous Coward 1294751


"normal" is like 50nGy. So 7400 / 50 = 150 times the normal level. Alarming, but not going to kill you...

Note
1000 nX = 1 uX (nano = 10^-9)
1uX = 1000 mX (micro = 10^-6)
1000 mX = 1 X (milli = 10^-3)

Note too that 100 RAD = 1 Sievert (Sv) If you ever hear them saying rads in full numbers or Sieverts in factions like 1/2, then run like Hell!!

Most meters measure these in rads/hr or Sieverts per hour. Normal is like 0.15 uSV/hr or 0.00000015 Sieverts per hour. If you ever get 1 Sievert of radiation or (100 rads) your are getting into really big trouble. Most folks see about 0.002 Sv per year...

Here is a nice meter at normal levels:

[link to team-titanium.com]

Hope this helps.

Quoting: Larse


yes, that helped a lot, but don't we have to factor in whether beta or alpha or gamma or whatever

no very familiar with these different types of radiation thanks

Quoting: Anonymous Coward 1294751


Alpha radiation is stopped by about anything... skin, paper, plastic. The only concern really with it is an alpha particle getting inside your body through inhalation or ingestion

Beta radiation is nastier. Causes burns on skin... can penetrate thin plastic. Need a few inches of concrete or lead to stop it.

Gamma is awful... unlike Alpha and Beta (which are particles with mass)... Gamma rays are pure energy with no mass and travel at near the speed of light. They penetrate straight through the body.... need feet of concrete or earth, several inches of solid lead to minimize its effect (you technically can never stop it... only minimize how potent it is by the time it reaches your body)

BUMP for great idea.

Hi all,

I'm on the west coast, waiting to see what happens.

Wondering if it's worth buying a geiger counter or maybe one of the yellow civil defense ones on Ebay?

Input plz. Thx

Anyone have information on purchasing the least expensive geiger counter and fastest deliver? TY

Damn. That Tokyo meter reading has been steadily climbing the whole time I've been watching it.