TABLE 4-6. GAMMA STANDARD SOLUTIONS Isotope keV 24) an 60 133 8 1338p6 1525 1876. 6065 40, 88y 22Ne 81, 161, 273 303, 356 122 662 1173, 1332 1461 898, 1836 511 Solution Activity Decay Constant 2,434 5/31/74 4.38x 10° 13,928 430,000 13,159 2,904 144,200 35,520 14,481 T/1/76 4/15/77 5/1/76 7/1/16 2/19/79 5/18/77 9/1/76 1.76 x 10" 1.355 x 107 6.324x 10° 3.621 x 10+ 5.414x 10/8 6.418 x 10° 7.30 x 107 dpm/ml_@ Date 13,928 (1/Day) 7/1/76 1.76 x 107 TABLE 4-7. SAMPLE COUNTING GEOMETRIES Distance from Detector to Center of Sample Fe BD 2em Large Petri Dish, 100 ee, (LPD) 3em oe Large Petri Dish, 100 ec, (LPD) Double Bagged Bulk Sample mm lem Cottage Cheese Container, 473 ec, (CCC) ony Large Petri Dish, 100 ec, (LPD) BH Sample Geometry Contact Small Petri Dish, 10 ec, (SPD) With Planehet Contact Marinelli Beaker 1000 ee Contact Marinelli Beaker 500 ec Contact Large Petri Dish, 100 ce, (LPD) Large Petri Dish, 100 ec, (LPD) Contact 1.5em ll Large Petri Dish, 100 ee, (LPD) 2.5 em 12 Small Petri Dish, 10 ec, (SPD) 2.0 em 13 Small Petri Dish, 10 ec, (SPD) 15em 14 Small Petri Dish, 10 ec, (SPD) 2.0 em 1s Small Petri Dish, 10 ee, (SPD) 3.0 em 133 6 em