The authors present the following 4 remarks as the results of caron-14
measurement in 1989-1993. (1) The sample collected at Januma, Sannohe,
coincided with that excavated from Hachinohe tephra. (2) ...
Technical comments on the chemical processing process and the
calculation of ageand concentration of samples, regarding C-14 age
determination and C-14concentration measurement, are given and
We have measured tritium concentrations in the environmental water samples
using a liquid scintillation counting system since 1987. In this report
we describe the technical procedures to obtain tritium ...