Yeah, JAEA, which calls U235 stable, says Indium 114. The Brookhaven tables say three of the eight are (very slightly) unstable. Given the astronomical pace of intranuclear fidgetings, how do they count up to a quintillion, let alone quintillions times the internal clock rate times picoseconds in a year? --rwg On 2015-07-28 16:38, Adam P. Goucher wrote:
I've seen a different nuclide map (I suppose the difference is whether elements with astronomical half-lives are considered stable or radioactive) where an isotope has the complementary property: it is unstable whereas its eight neighbours are stable.
Sent: Wednesday, July 29, 2015 at 12:32 AM From: "Bill Gosper" <billgosper@gmail.com> To: math-fun@mailman.xmission.com Subject: Re: [math-fun] nuclide map
Another selenium oddity: Both Se74 and Se82 are stable (and uncommon), but are unstable under the addition or removal of a proton, neutron, or both, or swap. (Eight possibilities apiece) There are *three* isotopes of erbium with this property. --rwg
On Tue, Jul 28, 2015 at 4:08 PM, Bill Gosper <billgosper@gmail.com> wrote:
Oddity: Both the Brookhaven tables list the prevalent isotope Se80 as STABLE, but its box, instead of black, is "beta decay magenta" with a decay mode of 2β- . Japan Atomic Energy Agency just says >.5 Gy. Wikipedia flatly says stable, which is interesting because they list no stable isotopes of tungsten, but ascribe quintillion year half-lives to five of them.
What gives?
With the Brookhaven tables.
--rwg Isn't it odd of JAEA to lump U235 with C12, stabilitywise? Hmm, my dandruff shampoo may leave me with a radiation deficiency.
On Tue, Jul 28, 2015 at 9:44 AM, Bill Gosper <billgosper@gmail.com> wrote:
Thanks Ed! I had rejected that because it wasn't an actual image, lacked Z labeling, but mostly because I hadn't thought to click on Decay Mode to override the defaulted Half Life, which is so colored as to make it almost impossible to notice the instability of technetium. I subsequently found http://elementdata.net/chart_of_the_nuclides.jpg , but Mike Stay's https://upload.wikimedia.org/wikipedia/commons/9/92/NuclideMap.PNG is exactly the ticket. Thanks, Mike! --Bill And here I thought SF stood for San Francisco.
On Tue, Jul 28, 2015 at 8:46 AM, Edward Fredkin <ed@fredkin.com> wrote:
Yes!
Look at http://www.nndc.bnl.gov/chart/help/index.jsp
Ed
From: Bill Gosper <billgosper@gmail.com> Reply-To: "billgosper@gmail.com" <billgosper@gmail.com> Date: Tuesday, July 28, 2015 at 11:01 AM To: "math-fun@mailman.xmission.com" <math-fun@mailman.xmission.com> Subject: nuclide map
Does anybody know where to find a full sized version of
https://upload.wikimedia.org/wikipedia/commons/7/79/NuclideMap_stitched_smal... ? Even though 4000 pixels wide, it's too small to read. (Will settle for unstitched.) --rwg
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