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Measurement of Potassium Isotope K40 Activity

Isotope Potassium 40K As we know, bananas are rich in potassium! What maybe not everyone knows is that potassium in nature is present with three isotopes: 39K (93,3%), 40K (0,0117%) and 41K (6,7%), 40K potassium is unstable and decades in beta mode. This means that potassium present in nature, even that contained in bananas …

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Alpha Activity Measures

Equipment The apparatus has been already described in the post DIY Alpha Spectrometer. The picture below shows the measuring chamber with the alpha detector and the connection to the vacuum pump. There is also an electronic part (not shown in the picture) for the amplification and processing of the signal …

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Cesium 137 Activity in Contaminated Soil

A bit of History … On 26 April 1986, in Chernobyl, Ukraine, the most serious accident ever occurred in a nuclear power plant. For a series of events, partly caused by human errors, partly due to design shortcomings, the fusion of the reactor core occurred, followed by a very strong …

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X Ray Spectroscopy with PIN Photodiode

A PIN diode (p-type, intrinsic, n-type diode) is a diode with a wide region of intrinsic semiconductor material (undoped) contained between a p-type semiconductor and an n-type semiconductor. The advantage of a PIN diode is that the depletion region exists almost completely within the intrinsic region, which has a constant …

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Tunnel Effect

From Wikipedia : Quantum tunneling or tunneling refers to the quantum mechanical phenomenon where a particle tunnels through a barrier that it classically could not surmount. This plays an essential role in several physical phenomena, such as the alpha decay and the nuclear fusion that occurs in main sequence stars like the …

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Particles in the Mist

Which particles can be seen in the cloud chamber ? Since the principle of operation is based on the ionization caused by the passage of the particle, it results that the higher the ionization capacity and the greater the visibility of the trace. Alpha particles produce short and fairly wide …

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Cloud Chamber

See the nuclear particles is possible! With a little patience, at PhysicsOpenLab we have built a cloud chamber, a tool that allows, for example, to reveal the traces of cosmic rays that are continually “raining” on Earth, coming from the remote regions of the universe. A cloud chamber is nothing more …

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Si-PIN Photodiode β Detector

A PIN diode (p-type, intrinsic, n-type diode) is a diode with a wide region of intrinsic semiconductor material (undoped) contained between a p-type semiconductor and an n-type semiconductor. The advantage of a PIN diode is that the depletion region exists almost completely within the intrinsic region, which has a constant …

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Cathode Ray Tube Experiments

A Crookes tube is an early experimental electrical discharge tube, with vacuum, invented by English physicist William Crookes and others around 1869-1875, in which cathode rays, streams of electrons, were discovered. Developed from the earlier Geissler tube, the Crookes tube consists of a partially evacuated glass bulb of various shapes, with two …

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The Rutherford-Geiger-Marsden Experiment

What made by Rutherford and his assistants Geiger and Marsden is perhaps one of the most important experiments of nuclear physics. The experiments were performed between 1908 and 1913 by Hans Geiger and Ernest Marsden under the direction of Ernest Rutherford at the Physical Laboratories of the University of Manchester. …

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