Hui, you may want to check this page: http://wiki.answers.com/Q/What_is_the_relationship_between_sievert_and_becquerel
Your English is much better than my Chinese, you are doing great, don't be embarrassed! Didier On Wed, Jul 10, 2013 at 8:53 AM, Hui Zhang <[email protected]> wrote: > Hello Robert: > > I am a little confuse how exactly much Rb87 in a bulb? Some people say > that it's couple millgram, but you tell me it's half a millgram, which is > ture? > > You message is good new to me, it let me relax, but I don’t understand > Bq/gram unit, would you please convert it to mSV unit, I can know the how > many mSV of human is safety by search by internet. I mean in extreme > situration, if all Rb87 of buld sprinkled in my table, how many exposure > value will I accepet in 24 Hour? > > I found some people (other electronics fan) wrote a formula about Rb87 > radioactivity calculation, that is: > > 1mg Rubidium * 27.835 * 0.27835 * 6.02 *10^23 / > 87/4.88/10^10/2/365/24/3600*1=625. > > So, decay energy=0.283MeV, about 600 electron per second, Is this > calculation correct? > > > > 27.835=Percent of Rb87 > > 6.02*10^23 = Avogadro's constant > > 87= Atomic weight > > 4.88*10^10== Half time of Rb87 (Year) > > 2 = Rb87 decay to half > > 365 = day of year > > 24 = hour of day > > 3600 = second of hour > > > > I am very glad to read many relay of my email, I want say thanks for > everyone. As you said why people be afraid of Rb87 but not other things, I > think maybe because we don’t understand it. Such as, I don’t afraid of RF > exposure, because I know it, I am a HAM and learned many RF exposure > knowledge, but of atom and radioactivity, I have only poor knowledge. > > > > Thanks everyone again, this is amazing mail-list. Say sorry for my poor > English. > > > > Hui > > > > > At 2013-07-09 19:40:50,"Robert Atkinson" <[email protected]> wrote: > >Hi Hui, > >Most bulbs use a mix of Rb87 and Rb85 with an activity of around 1500 > Bq/gram with less than half a millgram in a typical bulb, that's less than > a Bq per bulb (about 20 picocuries). You will get more ardiation from using > low sodium salt (potassium chloride) on your food. Potasium is essential > for life and Rb is chemically similar. > >In short don't worry. > >Robert G8RPI (also a geiger "nut" and collector of radioactive material) > > > > > >________________________________ > >From: Hui Zhang <[email protected]> > >To: Discussion of precise time and frequency measurement < > [email protected]> > >Sent: Tuesday, 9 July 2013, 5:07 > >Subject: [time-nuts] How dangerous if Rb lamp broken? > > > > > >Dear Group: > > I have four compact Rb Stanard, but I am worried about what if my Rb > lamp broken in accident someday? How dangerous of this situration? Is Rb87 > came out from Rb lamp will be a disaster? You know I haven't any beta rays > detect instrument. > > > > > >Hui > >_______________________________________________ > >time-nuts mailing list -- [email protected] > >To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >and follow the instructions there. > >_______________________________________________ > >time-nuts mailing list -- [email protected] > >To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
