<div dir="ltr">Hi All,<div><br></div><div>A reminder that journal club, complete with potentially rancid Kapow! and (presumably) other snacks will be taking place today at 3:30 in the MOB theory room. </div><div><br></div><div>See you there.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Jun 4, 2017 at 5:09 PM, Matthias Holl <span dir="ltr"><<a href="mailto:mholl@triumf.ca" target="_blank">mholl@triumf.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi everyone,<br>
<br>
this week, we'll discuss "High precision hyperfine measurements in<br>
Bismuth challenge bound-state strong-field QED"<br>
(<a href="https://www.nature.com/articles/ncomms15484" rel="noreferrer" target="_blank">https://www.nature.com/<wbr>articles/ncomms15484</a>). These are the questions:<br>
<br>
1. Why are heavy nuclei a good testing ground for QED?<br>
2. What is the "specific difference"? Why isn't it sufficient to measure<br>
the hyperfine splitting itself?<br>
3. How are H-like Bi and Li-like Bi produced and excited? What are the<br>
"specialized mirror systems" used to detect the photons?<br>
4. Why are there two bands visible in Fig. 2b?<br>
5. What possible explanations do the authors give for the large<br>
discrepancy between their results and theory?<br>
<br>
As usual, we'll meet on Wednesday at 3:30 in the MOB Theory Room and<br>
snacks will be provided.<br>
<br>
Cheers,<br>
Matthias<br>
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