| NUKLEONIKA 2001, 46(4):155-159
MEASUREMENT OF PLUTONIUM ISOTOPES IN GROUND-LEVEL AIR
IN NORTHEN-GERMANY – HISTORY AND RECENT RESULTS
Herbert Wershofen1, Dirk Arnold1, Thomas Steinkopff2
1 Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100,
38116 Braunschweig, Germany
2 Deutscher Wetterdienst (DWD) – Zentralamt, 135, Frankfurter Str.,
63067 Offenbach, Germany
The history of plutonium measurements performed on ground-level aerosols is summarised. Recent results are presented, the activity ratios a((239+240)Pu/a(137Cs) and a(238Pu)/a((239+240)Pu) measured are discussed and potential sources of 238Pu are considered.
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