Half-life measurement of 95mTc--refinement in the uncertainty value.
Measurements at Isotope Products Laboratories (IPL) carried out with a hyper-pure germanium (HPGe) spectrometer have sought to improve upon the accepted half-life value for 95mTc. The uncertainty associated with the currently accepted value of (61+/-2) days allows for potentially significant improvement. Through a series of 65 measurements over the course of nearly 2 years, using multiple source-to-detector counting distances and multiple reference photopeaks, the authors have determined a half-life that agrees with the current value while reducing the uncertainty of the value by 25-fold.
Isotope Products Laboratories, Radioassay Department, 24937 Avenue Tibbitts, Valencia, CA 91355-3427, USA.
Timothy
T
Catterson
Daniel James
DJ
Van Dalsem
D003198:Computer Simulation; D003627:Data Interpretation, Statistical; D017408:Guidelines as Topic; D006207:Half-Life; D008956:Models, Chemical; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013051:Spectrometry, Gamma / Q000379:methods*; D013667:Technetium / Q000032:analysis* / Q000737:chemistry / Q000592:standards; D014481:United States
D013667:Technetium