Ionization chamber measurements of the half-lives of 24Na, 42K, 76As and 198Au.
Samples of 24Na, 42K, 76As and 198Au were produced by irradiation in the National Institute of Standards and Technology (NIST) reactor, and examined for impurities before and after measurement. Half-life measurements were carried out in the NIST 4pigamma pressurized ionization chamber. The results are compared to presently accepted values and previous NIST measurements.
National Institute of Standards and Technology, Radioactivity Group, C114 Radiation Physics Building, 100 Bureau Drive Stop 8462, Gaithersburg, MD 20899-8462, USA. unterweg@nist.gov
M P
MP
Unterweger
R M
RM
Lindstrom
D000465:Algorithms; D001246:Astatine / Q000032:analysis / Q000737:chemistry / Q000592:standards; D002138:Calibration / Q000592:standards; D004867:Equipment Design; D006050:Gold Radioisotopes / Q000032:analysis / Q000737:chemistry / Q000592:standards; D006207:Half-Life; D008956:Models, Chemical; D011197:Potassium Radioisotopes / Q000032:analysis / Q000737:chemistry / Q000592:standards; D011868:Radioisotopes / Q000032:analysis* / Q000737:chemistry / Q000592:standards*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012979:Sodium Radioisotopes / Q000032:analysis / Q000737:chemistry / Q000592:standards
D006050:Gold Radioisotopes; D011197:Potassium Radioisotopes; D011868:Radioisotopes; D012979:Sodium Radioisotopes; D001246:Astatine