Energy investigation Sn isotopic beams Beam Br57 (Tm) E78 (AMeV) E tgt (AMeV) Sn132 7.129 293.11 269.04 Sn124 6.7383 295.89 270.07 Sn112 6.1263 298.42 270.22 Sn108 5.9152 298.68 269.09
Energy calculated at center of target using LISE++ Energy measured between these two points using beamline detectors Energy calculated here by BigRIPS
Methodology Use measurement of Br57 performed by BigRIPS team – I believe this is made using beamline detectors between F5 and F7 They calculate E78 from this measurement Check beamline detectors in between F78 drift and target I provide energy at center of target using E78 from BigRIPS notebook I assume charge state Z=50 for LISE++ physical calculator
Sn 132 (Runs 2819-3039) Brho 57 = 7.129 -> E78 = 293.11 AMeV -> 269.04 AMeV center of target (Sn 124) (assuming 0.417 mm effective thickness to center) Br57 (Tm) E78 (AMeV) Etgt (AMeV) 7.129 293.11 269.04
Sn132 material list Name Material Thickness (mm) Density(g/cm^3) SBT1 mylar H8C10O4 0.012 1.397 SBT1 H10C9 0.2 1.105 SBT1&2 mylar 0.024 SBT2 SBT2 mylar BDC1 kp window C22H10N2O4 0.08 1.42 BDC1 gas H10C4 90 9.54E-05 BDC1 cathode BDC2 kp window BDC2 gas BDC2 cathode Vacuum window 0.05 Air air 141.8 0.0012 AC Entrance Window Foil 0.004 S-TPC Gas Ar90C10H40 274.18 0.001534 Target (1st half) 124Sn 0.4175 7.282
Sn 124 (Runs 3044-3184) Brho 57 = 6.7383 -> E78 = AMeV -> AMeV center of target (Sn 112) (assuming 0.385 mm effective thickness to center) Br57 (Tm) E78 (AMeV) Etgt (AMeV) 6.7383 295.89 270.07
Sn 124 material list Name Material Thickness (mm) Density(g/cm^3) SBT1 mylar H8C10O4 0.012 1.397 SBT1 H10C9 0.2 1.105 SBT1&2 mylar 0.024 SBT2 SBT2 mylar BDC1 kp window C22H10N2O4 0.08 1.42 BDC1 gas H10C4 90 9.54E-05 BDC1 cathode BDC2 kp window BDC2 gas BDC2 cathode Vacuum window 0.05 Air air 141.8 0.0012 AC Entrance Window Foil 0.004 S-TPC Gas Ar90C10H40 274.1 0.001534 Target (1st half) 112Sn 0.3852 7.282
Sn 112 (Runs 2542-2653) Brho 57 = 6.1263 -> E78 = 298.42 AMeV -> AMeV center of target (Sn124) (assuming 0.417 mm effective thickness to center) Br57 (Tm) E78 (AMeV) Etgt (AMeV) 6.1263 298.42 270.22
Sn112 material list Name Material Thickness (mm) Density(g/cm^3) SBT1 mylar H8C10O4 0.012 1.397 SBT1 H10C9 0.2 1.105 SBT1&2 mylar 0.024 SBT2 SBT2 mylar BDC1 kp window C22H10N2O4 0.08 1.42 BDC1 gas H10C4 90 9.54E-05 BDC1 cathode BDC2 kp window BDC2 gas BDC2 cathode Vacuum window 0.05 Air air 141.8 0.0012 AC Entrance Window Foil 0.004 S-TPC Gas Ar90C10H40 274.18 0.001534 Target (1st half) 124Sn 0.4175 7.282
Sn 108 (Runs 2225-2509) Brho 57 = 5.9152 -> E78 = 298.68 AMeV ->269.09 AMeV center of target (Sn112) (assuming 0.385 mm effective thickness to center) Br57 (Tm) E78 (AMeV) Etgt (AMeV) 5.9152 298.68 269.09
Sn 108 material list Name Material Thickness (mm) Density(g/cm^3) SBT1 mylar H8C10O4 0.012 1.397 SBT1 H10C9 0.2 1.105 SBT1&2 mylar 0.024 SBT2 SBT2 mylar BDC1 kp window C22H10N2O4 0.08 1.42 BDC1 gas H10C4 90 9.54E-05 BDC1 cathode BDC2 kp window BDC2 gas BDC2 cathode Vacuum window 0.05 Air air 141.8 0.0012 AC Entrance Window Foil 0.004 S-TPC Gas Ar90C10H40 274.1 0.001534 Target (1st half) 112Sn 0.3852 7.282
Summary Energies calculated at center of target using LISE++, E78 calculated values from BigRIPS: Beam Br57 (Tm) E78 (AMeV) E tgt (AMeV) Sn132 7.129 293.11 269.04 Sn124 6.7383 295.89 270.07 Sn112 6.1263 298.42 270.22 Sn108 5.9152 298.68 269.09