Determination of half-life of Cs-137 - Recording and evaluating the decay and production curve with CASSY

VP6.4.3.4
Determination of half-life of Cs-137 - Recording and evaluating the decay and production curve with CASSY
Determination of half-life of Cs-137 - Recording and evaluating the decay and production curve with CASSY Decaying radioactivity after elution of Ba-137m (P6.4.3.4)
Determination of half-life of Cs-137 - Recording and evaluating the decay and production curve with CASSY Detailed view (P6.4.3.4)
Determination of half-life of Cs-137 - Recording and evaluating the decay and production curve with CASSY

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Description

In the experiment P6.4.3.4, a plastic bottle with radioactive Cs-137 is used. The Cs-137 continually decays into Ba-137m. The metastable isotop Ba-137m arising from the β-decay is selectively washed out by a syringe with eluation solution. The half-time amounts to 2.6 minutes approx.

Using two counter tubes, we can first observe the eluation transfer of radioactive Ba-137m out of the plastic bottle into the test tube. Inside the test tube, the Ba-137m will decay exponentially over time within a few minutes, at the same time, the activity of Ba-137m inside the plastic bottle will build up again. In the end, there is again a dynamic equilibrium of decay and production in the plastic bottle.

Components of equipment sets

1 559815OZ  8  Cs/Ba 137 m isotope generator 370 kBq LD
1 524013  8  Sensor-CASSY 2 LD
1 524220  4  CASSY Lab 2 LD
2 5240331  4  Geiger-Müller counter tube S LD
1 30002  4  Stand base, V-shaped, small LD
1 30042  4  Stand rod, 47 cm, 12 mm diam. LD
4 30101  4  Leybold multiclamp LD
4 666555  4  Universal clamp 0...80 mm LD
1 664043  4  Test tubes, Fiolax, 16 x 160 mm, set of 10 LD
1 664103  4  Beaker, DURAN, 250 ml, squat LD
1 additionally required:
PC with Windows XP/Vista/7/8/10 (x86 or x64)
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