<div dir="ltr"><div class="gmail_default" style=""><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">Hello All,<u></u><u></u></p><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><br></p><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">This weeks journal & snack club is tomorrow (Wednesday 21st) at 3:30 in the MOB.<br><br>Stephen will be presenting the attached paper:</p><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><a href="https://www.sciencedirect.com/science/article/pii/S0370269318301771" target="_blank" style="color:rgb(17,85,204);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">https://www.sciencedirect.com/<wbr>science/article/pii/<wbr>S0370269318301771</a></p><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><u></u> <u></u></p><p class="MsoNormal" style="font-family:arial,sans-serif;font-size:12.8px;margin:0px;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">Some Questions/Discussion Points:</p><ol start="1" type="1" style="font-family:arial,sans-serif;font-size:12.8px;margin-bottom:0cm;color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;margin-top:0cm"><li class="MsoNormal" style="margin:0px 0px 0px 15px">What would be the consequences of variations in the decay constant?<u></u><u></u></li><li class="MsoNormal" style="margin:0px 0px 0px 15px">The activity of the sources is calculated by integrating the full energy spectrum, why measure activity above the full photopeak energy.<u></u><u></u></li><li class="MsoNormal" style="margin:0px 0px 0px 15px">⁴⁰K  decays predominately via<span> </span><span style="color:black">β^{-<span> </span>}decay to<span> </span>⁴⁰Ca without the emission of a γ ray. As the experiment is insensitive to this type of decay can they discount variations in the decay rate.</span><u></u><u></u></li><li class="MsoNormal" style="margin:0px 0px 0px 15px"><span style="color:black">The detector experiences a significant gain shift over the course of the experiment. What could be the cause of this shift?</span><u></u><u></u></li><li class="MsoNormal" style="margin:0px 0px 0px 15px"><span style="color:black">In Fig 7 why is the standard deviation no longer horizontal after 100 days? The same effect is not seen in Fig 4  despite using the same methods.</span><u></u><u></u></li></ol><div style=""><font color="#000000"><span style="font-size:12.8px"><br>See you all tomorrow.<br></span></font></div></div></div>