CAT NO: DIDACTICNPS0018
RADIOACTIVITY DECAY AND Ba 137m HALF-TIME PERIOD.
RADIOACTIVITY DECAY AND Ba-137m HALF-TIME PERIOD With this experiment it is possible to obtain the decay curve of Ba-137 metastable state of the isotope Ba-137, and it is also
possible to determine its half-life.
The Ba-137 is the result of the decay of Cs-137 substance,
whose half-life is about 30 years. The Cs-137 decays to Ba-137
generating a β radiation. In 95% of decays, this is a transition
in a metastable Ba-137, that goes to Ba-137 through a y decay,
with a half-life of 2.551 minutes.
The substance is load inside the isotope generator Cs/Ba-
137m. The metastable isotope Ba-137, produces by the β decay
of Cs-137, is diluted with sodium-chloride solution acitifited at
the beginning of the experiment. The activity of the radioactive
substance, is then measured.
With the Geiger meter software, it is possible to control the
radioactive decay curve of the Ba-137m as a function of time.
• Elution of Ba-137m metastable isotopes starting from a
preparation of Cs-137.
• Measurement of elution activity as function of time and
determination of Ba-137 half-time.
• 1 Cs-137/ba-137m isotope generator, composed by generator,
syringe, tube, 250 ml solution and briefcase
• 1 support base
• 1 support bracket
• 2 clamps with universal plier
• Set of 10 test tubes, 16 x 150 mm
• 250 ml beaker (1)