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Science

eppur_se_muova

(36,247 posts)

7. Interesting -- this is a double electron-capture decay.

Reply to Judi Lynn (Original post)

Thu Apr 25, 2019, 11:46 AM

Apr 2019

It was only in 1987 that the first instance of double-beta (electron emission) decay was observed, with t1/2 ~ 1.1 x 10^20 y. That's more than a hundred times faster than the process described here.

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Dark Matter Hunter Captures The 'Rarest Thing Ever Recorded' In A Process 1 Trillion Times Longer Th [View all] Judi Lynn Apr 2019 OP

Wow. Just wow. K&R. nt tblue37 Apr 2019 #1

Rensselaer an awesome school 3sam3 Apr 2019 #2

No football team,... I bet they have a killer chess club. magicarpet Apr 2019 #3

Fuck. That ain't nuthin. Ya wanna see slow? 3Hotdogs Apr 2019 #4

Wow! lastlib Apr 2019 #5

Is this rarer than tRumpolini complying with a subpoena? lastlib Apr 2019 #6

Interesting -- this is a double electron-capture decay. eppur_se_muova Apr 2019 #7

If it takes that long to decay how could they observe it at all given the current age cstanleytech Apr 2019 #8

124 grams of Xe-124 contains 6E23 atoms ... eppur_se_muova Apr 2019 #9

Still not getting it, sorry. cstanleytech Apr 2019 #10

OK. There are LOTS and LOTS of atoms ... ;) eppur_se_muova Apr 2019 #11

No, I mean if they say it takes a long time to decay why are they even seeing cstanleytech Apr 2019 #12

The actual time for any atom to decay is random; *averaging* these times gives you the half life. eppur_se_muova Apr 2019 #13

Oh, ok I think I get it now.........barely of course :) cstanleytech Apr 2019 #14