The 3/1H isotope of hydrogen, which is called tritium (because it contains three nucleons), has a half-life of 12.33yr, it can be used to measure the age of objects up to about 100yr. It can be used to measure the age of objects up to about 100yr. It is produced in the upper atmosphere by cosmic rays and brought to Earth by rain. AS an application, determine approximately the age of a bottle of wine whose 3/1H radiation is about 1/10 that present in new wine.