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Hi everyone,<br>
<br>
the next Journal Club is this Wednesday at 3:30 in the MOB Theory
Room. We'll be discussing "Observation of the Isovector Giant
Monopole Resonance via the <span class="aps-inline-formula"><span
id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML"
tabindex="0" style="font-size: 107%;"><span id="MJXc-Node-1"
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style="vertical-align: 0.457em; padding-left: 0.05em;
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class="mjx-mrow" style="font-size: 70.7%;"><span
id="MJXc-Node-8" class="mjx-mn"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em; padding-bottom:
0.348em;">28</span></span></span></span><span
id="MJXc-Node-5" class="mjx-mrow"><span
id="MJXc-Node-6" class="mjx-mi"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.417em; padding-bottom:
0.348em;">Si</span></span></span></span><span
id="MJXc-Node-9" class="mjx-mo"><span class="mjx-char
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70.7%;"><span id="MJXc-Node-14" class="mjx-mn"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em; padding-bottom:
0.348em;">10</span></span></span></span><span
id="MJXc-Node-11" class="mjx-mrow"><span
id="MJXc-Node-12" class="mjx-mi"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em; padding-bottom:
0.348em;">Be</span></span></span></span><span
id="MJXc-Node-15" class="mjx-mo"><span class="mjx-char
MJXc-TeX-main-R" style="margin-top: -0.171em;
padding-bottom: 0.521em;">,</span></span><span
id="MJXc-Node-16" class="mjx-mmultiscripts MJXc-space1"><span
class="mjx-presup" style="vertical-align: 0.436em;
padding-left: 0.05em; padding-right: 0px;"><span
id="MJXc-Node-23" class="mjx-mrow" style="font-size:
70.7%;"><span id="MJXc-Node-24" class="mjx-mn"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em; padding-bottom:
0.348em;">10</span></span></span></span><span
id="MJXc-Node-17" class="mjx-mrow"><span
id="MJXc-Node-18" class="mjx-msup"><span
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class="mjx-mrow"><span id="MJXc-Node-20"
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0.382em; padding-bottom: 0.348em;">B</span></span></span></span><span
class="mjx-sup" style="font-size: 70.7%;
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padding-right: 0.071em;"><span id="MJXc-Node-21"
class="mjx-mrow" style=""><span
id="MJXc-Node-22" class="mjx-mo"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.175em; padding-bottom:
0.313em;">∗</span></span></span></span></span></span></span><span
id="MJXc-Node-25" class="mjx-mo"><span class="mjx-char
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padding-bottom: 0.59em;">[</span></span><span
id="MJXc-Node-26" class="mjx-mn"><span class="mjx-char
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padding-bottom: 0.348em;">1.74</span></span><span
id="MJXc-Node-27" class="mjx-mtext"><span
class="mjx-char" style="padding-top: 0.521em;
padding-bottom: 0.244em;"><span class="mjx-charbox
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id="MJXc-Node-28" class="mjx-mtext"><span
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MJXc-font-inherit" style="font-size: 85.3%;
padding-bottom: 0.312em; width: 0.18em;"> </span></span></span><span
id="MJXc-Node-29" class="mjx-mi MJXc-space1"><span
class="mjx-char MJXc-TeX-main-R" style="padding-top:
0.382em; padding-bottom: 0.348em;">MeV</span></span><span
id="MJXc-Node-30" class="mjx-mo"><span class="mjx-char
MJXc-TeX-main-R" style="padding-top: 0.452em;
padding-bottom: 0.59em;">]</span></span><span
id="MJXc-Node-31" class="mjx-mo"><span class="mjx-char
MJXc-TeX-main-R" style="padding-top: 0.452em;
padding-bottom: 0.59em;">)</span></span></span></span></span></span></span>
Reaction at <span class="aps-inline-formula"><span
id="MathJax-Element-2-Frame" class="mjx-chtml MathJax_CHTML"
tabindex="0" style="font-size: 107%;"><span id="MJXc-Node-32"
class="mjx-math"><span id="MJXc-Node-33" class="mjx-mrow"><span
id="MJXc-Node-34" class="mjx-mrow"><span id="MJXc-Node-35"
class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em; padding-bottom: 0.348em;">100</span></span><span
id="MJXc-Node-36" class="mjx-mtext"><span
class="mjx-char" style="padding-top: 0.521em;
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MJXc-font-inherit" style="font-size: 85.3%;
padding-bottom: 0.312em; width: 0.18em;"> </span></span></span><span
id="MJXc-Node-37" class="mjx-mtext"><span
class="mjx-char" style="padding-top: 0.521em;
padding-bottom: 0.244em;"><span class="mjx-charbox
MJXc-font-inherit" style="font-size: 85.3%;
padding-bottom: 0.312em; width: 0.18em;"> </span></span></span><span
id="MJXc-Node-38" class="mjx-mi"><span class="mjx-char
MJXc-TeX-math-I" style="padding-top: 0.486em;
padding-bottom: 0.279em;">AMeV" (<a
class="moz-txt-link-freetext"
href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.172501">https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.172501</a>).
<br>
<br>
Hope to see you there,<br>
Matthias<br>
<br>
Questions:<br>
<br>
1. What is the Isovector Giant Monopole Resonance? <br>
2. How does it differ from the other excitation modes
mentioned in the paper?<br>
</span></span></span></span></span></span></span><span
class="aps-inline-formula"><span id="MathJax-Element-2-Frame"
class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size:
107%;"><span id="MJXc-Node-32" class="mjx-math"><span
id="MJXc-Node-33" class="mjx-mrow"><span id="MJXc-Node-34"
class="mjx-mrow"><span id="MJXc-Node-38" class="mjx-mi"><span
class="mjx-char MJXc-TeX-math-I" style="padding-top:
0.486em; padding-bottom: 0.279em;">3. How was the </span></span></span></span></span></span></span><span
class="aps-inline-formula"><span id="MathJax-Element-2-Frame"
class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size:
107%;"><span id="MJXc-Node-32" class="mjx-math"><span
id="MJXc-Node-33" class="mjx-mrow"><span id="MJXc-Node-34"
class="mjx-mrow"><span id="MJXc-Node-38" class="mjx-mi"><span
class="mjx-char MJXc-TeX-math-I" style="padding-top:
0.486em; padding-bottom: 0.279em;"><span
class="aps-inline-formula"><span
id="MathJax-Element-1-Frame" class="mjx-chtml
MathJax_CHTML" tabindex="0" style="font-size:
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id="MJXc-Node-2" class="mjx-mrow"><span
id="MJXc-Node-3" class="mjx-mrow"><span
id="MJXc-Node-4" class="mjx-mmultiscripts"><span
class="mjx-presup"
style="vertical-align: 0.457em;
padding-left: 0.05em; padding-right:
0px;"><span id="MJXc-Node-7"
class="mjx-mrow" style="font-size:
70.7%;"><span id="MJXc-Node-8"
class="mjx-mn"><span class="mjx-char
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style="padding-top: 0.417em;
padding-bottom: 0.348em;">Si</span></span></span></span><span
id="MJXc-Node-9" class="mjx-mo"><span
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padding-bottom: 0.59em;">(</span></span><span
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style="padding-top: 0.382em;
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style="padding-top: 0.382em;
padding-bottom: 0.348em;">Be</span></span></span></span><span
id="MJXc-Node-15" class="mjx-mo"><span
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style="vertical-align: 0.436em;
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0px;"><span id="MJXc-Node-23"
class="mjx-mrow" style="font-size:
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class="mjx-mn"><span class="mjx-char
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style="padding-top: 0.382em;
padding-bottom: 0.348em;">10</span></span></span></span><span
id="MJXc-Node-17" class="mjx-mrow"><span
id="MJXc-Node-18" class="mjx-msup"><span
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id="MJXc-Node-20" class="mjx-mi"><span
class="mjx-char
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style="padding-top: 0.382em;
padding-bottom: 0.348em;">B</span></span></span></span><span
class="mjx-sup" style="font-size:
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padding-left: 0px; padding-right:
0.071em;"><span id="MJXc-Node-21"
class="mjx-mrow" style=""><span
id="MJXc-Node-22" class="mjx-mo"><span
class="mjx-char
MJXc-TeX-main-R"
style="padding-top: 0.175em;
padding-bottom: 0.313em;">∗</span></span></span></span></span></span></span><span
id="MJXc-Node-25" class="mjx-mo"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.452em;
padding-bottom: 0.59em;">[</span></span><span
id="MJXc-Node-26" class="mjx-mn"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.382em;
padding-bottom: 0.348em;">1.74</span></span><span
id="MJXc-Node-27" class="mjx-mtext"><span
class="mjx-char" style="padding-top:
0.521em; padding-bottom: 0.244em;"><span
class="mjx-charbox MJXc-font-inherit"
style="font-size: 85.3%;
padding-bottom: 0.312em; width:
0.18em;"> </span></span></span><span
id="MJXc-Node-28" class="mjx-mtext"><span
class="mjx-char" style="padding-top:
0.521em; padding-bottom: 0.244em;"><span
class="mjx-charbox MJXc-font-inherit"
style="font-size: 85.3%;
padding-bottom: 0.312em; width:
0.18em;"> </span></span></span><span
id="MJXc-Node-29" class="mjx-mi
MJXc-space1"><span class="mjx-char
MJXc-TeX-main-R" style="padding-top:
0.382em; padding-bottom: 0.348em;">MeV</span></span><span
id="MJXc-Node-30" class="mjx-mo"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.452em;
padding-bottom: 0.59em;">]</span></span><span
id="MJXc-Node-31" class="mjx-mo"><span
class="mjx-char MJXc-TeX-main-R"
style="padding-top: 0.452em;
padding-bottom: 0.59em;">)</span></span></span></span></span></span></span>
reaction used as a filter to select ΔS=0 events?</span></span></span></span></span></span></span><br>
<span class="aps-inline-formula"><span id="MathJax-Element-2-Frame"
class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size:
107%;"><span id="MJXc-Node-32" class="mjx-math"><span
id="MJXc-Node-33" class="mjx-mrow"><span id="MJXc-Node-34"
class="mjx-mrow"><span id="MJXc-Node-38" class="mjx-mi"><span
class="mjx-char MJXc-TeX-math-I" style="padding-top:
0.486em; padding-bottom: 0.279em;"></span></span></span></span></span></span></span><span
class="aps-inline-formula"><span id="MathJax-Element-2-Frame"
class="mjx-chtml MathJax_CHTML" tabindex="0" style="font-size:
107%;"><span id="MJXc-Node-32" class="mjx-math"><span
id="MJXc-Node-33" class="mjx-mrow"><span id="MJXc-Node-34"
class="mjx-mrow"><span id="MJXc-Node-38" class="mjx-mi"><span
class="mjx-char MJXc-TeX-math-I" style="padding-top:
0.486em; padding-bottom: 0.279em;">4. What was the
advantage of using GRETINA for in this experiment?<br>
5. How is the monopole contribution extracted?<br>
6. What possible explanations for the disagreement
between experimental and theoretical cross sections
are given?</span></span><span id="MJXc-Node-39"
class="mjx-mi MJXc-space1"><span class="mjx-char
MJXc-TeX-main-R" style="padding-top: 0.382em;
padding-bottom: 0.348em;"></span></span></span></span></span></span></span>
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