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.
