The activity of a radioactive sample falls from 600 s^(-1) to 500 s^(-... 03:23 The number of ^238 U atoms in an ancient rock equals the number of ^20... 02:46 Equal masses of two samples of charcoal A and B are burnt separately a... 05:34 Suppose, the daughter nucleus ...
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
To solve the problem, we need to determine the half-life of a radioactive sample given that its activity drops to one-third of its initial value in 80 minutes. We can use the relationship between activity, time, and half-life in radioactive decay. 1. Understand the Relationship: The ac...
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...
Activity, in radioactive-decay processes, the number of disintegrations per second, or the number of unstable atomic nuclei that decay per second in a given sample. Activity is expressed in the International System of Units by the becquerel (Bq).
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 ha
The invention relates to a device for measuring gamma activity of a radioactive liquid characterised in that it comprises - a gamma activity detector 1, - a vertical tube 3, placed in front of the measurement window of the detector, - means 6 for making a central jet 7 of sample liquid ...
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 ...
International Journal of Radiation Applications & Instrumentation Part A Applied Radiation & IsotopesSchrader, H., 1986. 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....