Brand and Model RESOlution-LR 193nm Excimer Laser System
Wavelength 193nm
Pulse Duration 20ns
Spot Size (U-Pb analysis) 110μm, (75μm - NIST614)
Spot Size (Elemental mapping) 91x91 (75μm NIST612)
Repetition Rate 10Hz
Energy Attenuation 100%T (50% NIST612)
Laser Fluency 8 j/cm2
ICPMS
Brand and Model Agilent 7900x
Forward Power 1350W
Torch Depth 4.5mm
Gas Flows
Plasma (Ar) Auxiliary (Ar) 15L/min 1L/min
Carrier (He) 07L/min
Sample (Ar) 0.88L/min
Data Acquisition Parameters
Data Acquisition Protocol Time resolved analysis
Scanned Isotopes (U-Pb analysis) 43Ca, 202Hg 204Pb, 206Pb, 207Pb, 208Pb, 232Th 238U
Scanned Isotopes (elemental mapping) 23Na, 25Mg, 27Al, 29Si, 43Ca, 55Mn, 56Fe, 88Sr, 130Ba, 139La, 140Ce, 141Pr, 146Nd, 147Sm, 153Eu, 157Gd, 159Tb, 163Dy, 165Ho, 166Er, 169Tm, 172Yb, 175Lu, 202Hg, 204Pb, 206Pb, 207Pb, 208Pb, 232Th, 238U
Detector Mode Peak Hopping, Pulse & Analog counting
Background Collection 30 (NIST612) 10 (mapping)
Ablation for Age Calculation 30 (ablation time for mapping varied by line length)
Washout 20
Standards
Primary Standards (U-Pb analysis) NIST614
Secondary Standards (U-Pb analysis) WC-1, ‘Prague’
Primary Standards (elemental mapping) NIST612