Alpha-radioactivity-related upper age limit for thermoluminescence dating?

Dating the past with Radioactivity

Very soon after the discovery of radioactivity, measurements of the heavy radioactive elements existing in nature were undertaken to determine the age of rocks (Rutherford 1904), but only when Professor Willard Libby in an evening lecture during the first United Nations Conference on the Peaceful Uses of Atomic Energy in Geneva in 1955 described how he and his research team had evolved the carb...

The Upper Limit of C-14 Age?

Upper age limit for bronchiolitis: 12 months or 6 months?

confidence in their ability to quit experiencing a reduction in their level of motivation, and smokers achieving success boosting them up. We could not establish with confidence whether motivation levels were still balanced between groups throughout the duration of the study. Lastly, it was suggested to expand upon the correlation between behavioural (i.e. GN-SBQ) and physical (i.e. the Fagerst...

Upper age limit should be raised for cancer screening

Caroline White, London 204, 64, 207, 105 Current age bands for cancer screening in the United Kingdom seem to have been arbitrarily selected and are not based on rational criteria, according to researchers from the Wolfson Institute of Preventive Medicine in London. The age band is critical to evaluating the effectiveness of screening programmes and for identifying priorities in screening polic...

Alpha radioactivity in Indian cement samples

ABSTRACT  Background: The essential constituents of cements like lime, silica and alumina are derived from earth’s crust in which radioactive elements like uranium, thorium etc are also present in varying amounts almost everywhere. These two elements are considered as the parent elements of uranium and thorium radioactive decay series in which radon and thoron are produced respectively as decay...