Short-lived radioisotope (SLRad) data collected aboard R/V Point Sur cruise PS18-25 in the northern Gulf of Mexico from 2018-05-18 to 2018-05-23

This dataset contains short-lived radioisotope (SLRad) data collected aboard R/V Point Sur cruise PS18-25 in the northern Gulf of Mexico from 2018-05-18 to 2018-05-23. Short-lived radioisotope (SLRad) data are generated for selected core sub-samples at 2mm sampling intervals for “surficial unit” and 5mm sampling resolution intervals to the base of cores. SLRad data generated include sample activity as disintegrations per minute per gram (dpm/g) of 1) Excess Thorium-234 (234Thxs) activity, which is calculated by measuring the total Thorium-234 (234ThTot) activity and the subtraction of the measured or estimated “Supported” Thorium-234 (234ThSup) activity, 2) Excess Lead-210 (210Pbxs) activity, which is calculated by measuring the total Lead-210 (210PbTot) activity and subtraction of the measured background Lead-210 (210PbSup) activity {average of Lead-214 (214Pb) at 295 kiloelectron volts (keV), 214Pb at 351keV, and Bismuth-214 (214Bi) at 609keV}, 3) Cesium-137 (137Cs) activity, and 4) Berilium-7 (7Be) activity. The dataset also includes the date and location of sample collection. The cruise documentation was provided for the R/V Point Sur cruise PS18-25 led by chief scientist Dr. Arne Diercks.