ELOG HIL099-134Sm

EAGLE IRRADIATIONS EXTERNAL Analysis Students Workshop Shift Plans

GAMMA-ONLY NEEDLE NEEDI COULEX PLUNGER GENERAL

HIL102-128Cs HIL087-176Pt Nd148_2 176Pt HIL109-172Os HIL124-128Cs HIL061 Nd148 HIL106-119Cs HIL097-118Xe HIL099-134Sm April16 xdaq

HIL099-134Sm

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Entry time:	Tue Feb 24 18:27:45 2026
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p>16/03/2023</p> <p>Plunger chamber closed, some dummy target and stopper probably inside</p> <p>run 72    eagle closed</p> <p>run 73    right half of EAGLE completely opened</p> <p><br /> Three screenshots are attached:</p> <p>Run 72  EAGLE closed</p> <p>1)  Three rings.  There is significantly more 511 in ring 143 than in 117, 101</p> <p>2) 5 detectors of ring 143. They all look similar to each other.</p> <p>Run 73  right half of EAGLE opened</p> <p>3) 5 detectors of ring 143.  The 3 detectors in the opened half hardly see 511 keV, the other 2 do.</p> <p> </p> <p>Check with Colibri and a gamma scintillator probe ws done: largest activity is visible close to the target chamber, in the region starting at the edge of the chamber, end ending about 6 cm upstream.</p> <p>About 80 gamma counts/s are seen there. The count rate decreases further upstream.</p> <p>Background rate:  20 to 30 counts/s, 25 counts/s in Sala Fizykow.</p> <p>Radioactivity line seen in the spectra,  with the same behaviour as 511:   743.5,  936 keV, 1434 keV.  These are lines from 52Cr, fed by beta+ decay of 52Mn.</p> <p>Confirmed by Michain gamma-gamma.</p> <p>52Mn can be produced in the a2pn channel in  the reaction 32S+27Al</p> <p> </p></td> </tr> </tbody> </table> </p><p> </p> Encoding: HTML ELCode plain Suppress Email notification

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