No Xe-133 Detected Yet?

Submitted by Anonymous on Mon, 2011-03-28 01:54

Thanks so much for your updates, Dr. Chivers! Just to confirm, you haven't detected any Xenon-133 yet in your air or rainwater samples? Any other fallout-related isotopes detected besides those of iodine, cesium, or tellurium? I understand that if you do detect any other isotopes, you'll post those results, correct?

Can we thus assume that no detectable fallout containing alpha particles has reached your testing location so far?

Lastly, is it correct to just add up the Bq/L for each of the reported isotopes for a given sample in order to get the Total Fallout Radioactivity it contains? Assuming no alpha particles are present so far, can we then just convert the Total Bq/L in a given sample to mSv or mRem? Adding a Total Sample Fallout Radioactivity column on the data tables would be helpful, but not imperative.

Thank you once again from Humboldt County!

L.P.

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RADIATION

Submitted by Anonymous (not verified) on Thu, 2011-04-14 09:05.

IMPORTANT *VERY*
http://www.youtube.com/watch?v=fJ4JvQvQ0E0

Radiation ... Cesium 137 Iodine 131 and Xenon 133

Submitted by Anonymous (not verified) on Thu, 2011-04-14 06:23.

http://www.youtube.com/watch?v=xaup0qywTto

the above link is 15 minutes long, well worth watching for information regarding surface and precipitation levels of Iodine131 Cesium137 and Xenon133 from the time of the Fukoshima accident to April 14th 2011

NILU maps and Xe-133

Submitted by bandstra on Thu, 2011-04-14 13:08.

Hi, please keep in mind my comments from another thread about interpreting the NILU maps: A few disclaimers

Regarding Xe-133, please see my comment here.

Mark [BRAWM Team Member]

Calculating total dose

Submitted by bandstra on Tue, 2011-03-29 00:27.

If you want to calculate one number giving the total effect of the radiation, you cannot just add the activities. Activity measures how many radioactive decays are occurring per second but contains no information on what kind of radiation it is (alpha, beta, or gamma) and what energy it is, which both affect the dose of radiation.

So you first have to convert from activity (Bq) to effective dose (mRem or mSv). The conversion requires a different factor for each isotope. These numbers are listed on the dose calculation page -- note that they vary a great deal across the isotopes we measure.

Once the conversion from activity to dose has been done, the total of the dose numbers will give you an accurate quantification of the total effect of the radiation.

Unfortunately, we have a

Submitted by dchivers on Mon, 2011-03-28 11:25.

Unfortunately, we have a particulate filter and Xe-133 will most likely be in gas form. I have looked for the Xe-133 and Xe-133m lines and I don't see anything relative to background. This does not mean it is not there, just that we are not sensitive to it from the filter standpoint.

They found the 16th actually

Submitted by Anonymous (not verified) on Mon, 2011-03-28 05:40.

March 18, 2011|By Rong-Gong Lin II | Los Angeles Times

A minuscule amount of radiation from the stricken Fukushima Daiichi nuclear reactor in Japan was detected in Sacramento but at such a low level that it posed no threat to human health, the U.S. Environmental Protection Agency said Friday afternoon.

One station in Sacramento detected "minuscule quantities" of a radioactive isotope, xenon-133, that scientists said they believed came from the reactors at the stricken Fukushima plant.

http://articles.latimes.com/2011/mar/18/world/la-fgw-japan-quake-sacrame...