[Phys-L] Dead list, XRF ws: Re: LGBTQ

[bernard cleyet <bernard@cleyet.org>]

> On 2022/Sep/17, at 15:54, Keith C Tipton via Phys-l <phys-l@mail.phys-l.org <mailto:phys-l@mail.phys-l.org>> wrote:
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> Why is this coming up on this almost-dead list anyhow?
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> - Keith


Sorry, I suspect it’s unnecessary for the majority of us.  Originally I thought it important that ALL students be treated W/respect, whether it’s physics or English.  

Dead list:  My other important list is, more correctly, a news letter 4X/year.  Horological Science Newsletter.  For the last several years it’s shrunk to, usually, only two articles/issue.  I think it’s because it follows a logistic curve.  I suspect that’s what's happened W/Phys-l.  Physlrnr has also saturated.  

OK  to add something, but likely only new to me.  

During the recent Show and Tell, (NorCal/Nevada AAPT section) I demonstrated the Compton effect in a NaI crystal.  Thinking lead would be more effective than the Al sheet described in the book:  ”Exploring Quantum Physics thought Hands-on Projects”, I used a Pb sheet for the first time, which indeed does give an enhanced Compton edge peak, but what’s that new peak between the Cs 32 keV and the edge (broad at ~ 200 keV)?  Being incipiently Alzheimer’sed, it took a week for percolation to result in the ”lightbulb".  So now I’ve found peaks from Au [1] , Ag (requires subtracting the Cs only spectrum, as is  buried in the 32 keV), Bi (Pepto Bismol tablets), U (self stimulated), and, of course, Pb. This peak is especially prominent when I shield my five inch scintillator W/lead shielding.  (Being sl. poor, I use dead small Lead-acid batteries.)  

So here’s something I think new to the list.  

bc   …. and he remembers, he improved the Moseley’s law app. when at UCSC.  

[1] My wife's first marriage gold ring wasn’t enough, so I purchased a Canadian $50 coin, cost $1820 — required borrowing.