AIDA
GELINA
BRIKEN
nToF
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ISOLDE
CIRCE
nTOFCapture
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179Ta
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StellarModelling
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K40
BRIKEN
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Mon Mar 31 13:14:18 2025
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> Calibration of new F11 plastic > (see photo) > > The new plastic is 1mm thick instead of 0.2mm used last year. > Dimensions:120mm x 100mm x 1mm > HV applied: -1800V > Anode signal connected to Ortec 474 TFA > Gain: 20 x minimum; Int: 200ns; Diff: 100ns; Invert > 60 Co source > > THIS WAS WRONG! POLARITY OF SIGNALS WAS REVERSED. > *************************************************************** > *File: 170328_1507_F11PL_60Co.root > *See attached wrong picture 170328_1507_F11_PL_RandL.pdf (R:Red, L:Black) > * > *Calibration (Gain=20): > *V1C7C3_EFIR (R): Peak(<E>=1.25MeV):2077.1 -> a1=0.0006028 MeV/u > *V1C7C4_EFIR (R): Peak(<E>=1.25MeV):1924.0 -> a1=0.0006507 MeV/u > *************************************************************** > > CORRECT SPECTRUM: > File: 170328_1838_F11PLCal.root > Picture: 170328_1838_F11PLCal.pdf > > ************************************************************* > > Stopping power calculation (SRIM): > 50 MeV/A 40Mg: S=102*1.184=120.8 MeV/mm > 100 MeV/A 40Mg: S=102*0.7129= 72.7 MeV/mm > (Later: according LISE simulations energy loss of 40Mg is 88MeV) > > What is the energy loss of the "light" particles?
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