TABLE 6a

INVENTORIES OF COSMOGENICALLY PRODUCED 81 Kr AND 41 Ar

81 Kr 41 Ar
Half-life 21 × 10 5 years 1.83 hours
Production Rate (atoms·cm -2 ·s -1 )
Troposphere

Total Atmosphere

--

1.5 × 10 -7

--

45 × 10 -4

Global Inventory 16.2 kg 0.014 g (23 PBq)
Distribution (%)
Stratosphere

Troposphere

Biosphere/land surface

Mixed ocean layer

Deep ocean layer

Ocean sediments

16.0

82.0

0

0.04

0.02

0

100

0

0

0

0

0

Concentration

Stratosphere

Troposphere

Oceans



--

--

--

Method of Production Cosmic ray bombardment of stable Kr nuclei Cosmic ray bombardment of stable Ar nuclei
Main Radiation X-ray 1.196 MeV
Notes : (1) Global inventory data as of 1967.

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