ISSN:
1476-4687
Quelle:
Nature Archives 1869 - 2009
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
Notizen:
[Auszug] ARTIFICIAL 14C in the atmosphere is produced in nuclear reactions (14N(n,_p)14C) between nitrogen atoms in the air and neutrons liberated in the nuclear explosions. The half-life of 14C is 5,730 40 years1, and the weak ?-activity has a mean energy of 80 keV. The normal specific activity of 14C ...
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1038/2061029a0