# Why you never dismatle an ionization fire alarm !

Discussion in 'General Science & Technology' started by Hideki Matsumoto, Oct 19, 2004.

Not open for further replies.
1. ### guthrieparadox generatorRegistered Senior Member

Messages:
4,089
I do, my unscientific aquintance, you said:
"By the way Am241 is Plutonium 238 bombarded with x-rays, this then transmutates into Am241."

Whereas the stuff I found said
"Americium is
produced when plutonium absorbs neutrons in nuclear
reactors and nuclear weapons tests."

3. ### geodesic"The truth shall make ye fret"Registered Senior Member

Messages:
1,002
I'm not sure exactly what you disagree about, but guthrie is right about the formation of Am-241. To go from Pu-238 to Am-241 you need 2 neutrons and 1 proton, which aren't going to come from x-rays.

5. ### Hideki Matsumotoñ{ìñÇÃóùâ?ÇÕêSÇÃíÜÇ©ÇÁóàÇ ÈÅBRegistered Senior Member

Messages:
275
Yes, that was a true story! By the way If you want Thorium go get some older gas lantern mantles. They are quite active!! Uranium is harder to obtain but can be bought at a photography store and or a chemical supply company as Uranyl Nitrate and is used to fog b/w film.
Radium and Radium III Chloride paint are impossible to get now! but Tritrium and Deuterium are used in the sign industry for making scintallophosphors on glow in the dark industrial signs.

17. ### geodesic"The truth shall make ye fret"Registered Senior Member

Messages:
1,002
That's kind of like saying graphite and diamond are the same they're both carbon, or, a better analogy, Cl-35 and Cl-37 are the same because their chemical properties are almost identical.

18. ### guthrieparadox generatorRegistered Senior Member

Messages:
4,089
Exactly Geodesic.

And as for your radioactive sample Hideki Matsumoto, maybe you'd better just seal it up in concrete and throw it into a big hole in the ground. Or else try to sell it on E-bay, saying it would be the perfect start to a dirty bomb

19. ### Hideki Matsumotoñ{ìñÇÃóùâ?ÇÕêSÇÃíÜÇ©ÇÁóàÇ ÈÅBRegistered Senior Member

Messages:
275
Seal my radioactive source up>? NEVER! That was a good find! It makes an excellent test source! I use tweezers to handle it and proper gloves! I wonder if I could maybe use it for a micronuclear cell. Hmmmm? Maybe I could trade it for some Co60? hmm. I woulden't mind have some high energy gamma around!

20. ### guthrieparadox generatorRegistered Senior Member

Messages:
4,089
Whooooooaaaaa there. If your wanting high energy gamma you might like to start thinking about shielding.

21. ### geodesic"The truth shall make ye fret"Registered Senior Member

Messages:
1,002
You do realise high energy gamma is what is used to kill cancer cells in radiotherapy? And you're unlikely to find much useful shielding against high energy gamma, unless a nice thick concrete wall?
By the way, did you know that concrete emits gamma rays? It's because it contains K40, which decays by beta+, which then annihilates to produce to gamma rays.

22. ### Hideki Matsumotoñ{ìñÇÃóùâ?ÇÕêSÇÃíÜÇ©ÇÁóàÇ ÈÅBRegistered Senior Member

Messages:
275
Concrete emmiting gamma rays? really? no insult intended but I have never come across this even with a high sensitivity NaI scintillometer. I have got the standard background counts here up to 0.08-0.22uSv/hr but nothing that would indicate this phenomenon.
However KCl registers this K40 phenomemenon quite well

23. ### geodesic"The truth shall make ye fret"Registered Senior Member

Messages:
1,002
I never said it emitted a lot - think about it. Concrete is pretty good at absorbing gamma, and you're obviously not going to get as much as from a pure pootassium salt. It was just a factoid.