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[{"$nulls":10},"Electronic Appendix 1"]
[]
["A typical time-resolved spectrum obtained in the laser ablation regime to determine the detection system dead time using the ratio method"]
[]
["Analytical list:","U235, 5 acquisition points per peak within a mass window of 10%, 10 ms per point as a dwell time; 50 ms as a total per-sweep dwell time"]
[null,"U238, 5 acquisition points per peak within a mass window of 10%, 4 ms per point as a dwell time; 20 ms as a total per-sweep dwell time"]
[]
["Number of sweeps:",300]
[]
["Ablation parameters:","NIST SRM 612, linear rastering of the laser beam with a speed of 20 µm/s, 75 µm beam size, 14 Hz repetition rate, 6 J/cm2 on-sample energy density"]
[]
["Time, s","U235","U238",null,"U238"]
[]
[null,"Intensity,","Intensity,",null,"Number of arrivals"]
[null,"cps","cps",null,"during 20ms"]
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[21.59600067,7421.687096,2652391.823,null,53048]
[21.67099953,7181.191912,2705069.353,null,54101]
[21.74600029,7803.043518,2849316.109,null,56986]
[21.82099915,6699.611573,2767834.285,null,55357]
[21.89699936,7421.886883,2848484.853,null,56970]
[21.97200012,6438.719245,2999025.864,null,59981]
[22.04700089,6800.048073,3051158.406,null,61023]
[22.12199974,6639.589961,3027553.88,null,60551]
[22.19799995,7140.776386,3071548.163,null,61431]
[22.27300072,6880.077625,2988379.241,null,59768]
[22.34799957,7522.127512,2889944.295,null,57799]
[22.42300034,6719.61882,2788114.258,null,55762]
[22.49900055,7020.530715,2838051.723,null,56761]
[22.5739994,8163.999373,2682135.319,null,53643]
["mean",null,null,null,57871]
["stdvev",null,null,null,2517.8]
["all intensities corrected for a dead time of 27 ns"]