Te 129m
Mo 99
Cs 136
Ru 106/Rh 106
Ce 141
Ce 144/Pr 144
Zr 95
Nb 95
Ag 110m

33.6
2,74
13
372
32.5
284
64
35
249

days

The share of the activity of Sr 90 and Tritium played only an insignificant
 role in the Fallout. The share of Sr 90 in the Fallout was
not exactly determinable in seawater samples, because it lies within
the deviation range of the values ascertained before the accident.
The activity concentrations of Cm 242 surmounts those of Pu 239. The
daughter isotope of Cm 242 is Pu 238, with a half-life of 87 years.

Temporal Survey

28.04.1986

29.04.1986

Receipt of the first information concerning radioactive
 Fallout in Sweden and Finland, in the
evening newscasts.

Instructions to the Research Vessel "Gauss", at that
time in the Baltic Proper, to take water samples and
continuous total Gamma-radiation measurements in the
surface water.

Precautionary water sampling at Light Vessel
"Pehmarnbelt”".

Gamma-spectrometrical investigation of a grass
sample in the vicinity of the Institute in
Hamburg-Sülldorf (no increased contamination).

Commencement of the exchange of information with
domestic and foreign institutes.

30.04.1986

Telex from the German Weather Service, by order of
the Federal Minister of the Interior, with the request
 for additional special measurements.

Investigation of a further grass sample (no
increased contamination).

32.05.1986

Commencement of the regular taking of water samples