After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The initial activity of the sample in dps is View Solution If half-life of a radioactive element is3hours. After9hours its activity becomes ...
The activity of a sample of a radioactive meterial isA1, at timet1, andA2at timet2(t2>t1). If its mean life T, then View Solution The rate of decay of a radioactive sampel is given byR1at timet1andR2at a later time.t2. The mean life of this radioactive sample is: ...
process and apparatus for the determination of the real level of activity of a radioactive sample to isotropic liquid disposed within a scintillatorEMMET CAVANAUGH,ROBERT
In a liquid scintillation counter the light output from a liquid scintillation sample containing radioactive isotopes of unknown activity is measured by means of a detector. A pulse height analyzer having discriminators that are combined to define pulse height windows, is connected to the detector fo...
Sample cell and method for measuring beta activity of a radioactive fluidThe cell with a sample space and a scintillator for measuring the beta-activity of a radioactive liquid comprises at least one shielding plate which is located between the sample space and the scintillator. Also claimed is...
Comparison with previous colorimetric assays indicates an improvement in sensitivity of about 30-fold, and advantages in terms of sample economy and simplified manipulation.关键词: tryptophan synthetase radioactive assay DOI: 10.1016/0300-9084(90)90005-2 被引量: 12 ...
Determination of radioactive impurities in activity measure- ments with non-discriminating detectors. Int. J. Radiat. Appl. Instrum. Part A Appl. Radiat. Isot. 37, 115-120.SCHRADER H. & WALZ K.F, Determination of Radioactive Impurities in Activity Measurements With Non Discriminating Detectors,...
1.Determination of the αActivity in Iron and Steel--Saturatated Thickness Process钢铁中α放射性强度的测量——饱和厚层法 2.The intensity of a radioactive source.放射性放射原的强度 3.Detection of Alpha Radioactivity Using Autoradiography With Phosphor Screen用磷屏放射自显影法测量α核素的放射性活度 ...
The present invention relates to a measuring cell for measurement of the beta - activity of a radioactive liquid, comprising a measuring cell with an inlet and an outlet as well as a scintillator and at least a shield plate which, between the radioactive liquid and the scintillator is arrange...
reaction with ammonium molybdate under acidic conditions, enabling the absorption of phosphomolybdate on the beads, followed by measuring ofscintillation in the presence of cesium chloride[37]. This method can be used as a high throughput screening assay; however it generates a lot of radioactive ...