Analysis of Rutherford Scattering
The fact that an atom is „mostly empty“ was confirmed by Rutherford, Geiger and Marsden in a momentous experiment. They let a parallel bundle of α-particles fall on a very thin sheet of gold foil. In so doing they found that the vast majority of α-particles pass through the gold foil almost without any deflection at all and only very few are deflected to any large degree. They concluded from this that atoms comprise a nearly massless, extended shell and a massive core concentrated practically at a point.
Experiment C18.104.22.168, carries out an observation with an Am-241-preparation in a vacuum chamber. Depending on the scatter angle ϑ the scatter rate N(ϑ) of the α-particles is measured with a Geiger-Müller tube.
Components of experiment:
|1||559 82OZ||Am-241 preparation, 330 kBq|
|1||559 56||Rutherford scattering chamber|
|1||559 52||Aluminium foil in frame|
|1||559 931||Discriminator preamplifier|
|1||562 791||Plug-in power supply, 12 V AC|
|1||575 471||Counter S|
|1||378 73||Rotary-vane vacuum pump S 1.5|
|1||378 005||T-piece, DN 16 KF|
|1||378 040ET2||Centring rings (adapters), DN 10/16 KF, set of 2|
|1||378 045ET2||Centring rings, DN 16 KF, set of 2|
|2||378 050||Clamping ring, DN 10/16 KF|
|1||378 771||Air inlet valve, DN 10 KF|
|1||378 031||Hose nozzle, DN 16 KF|
|1||667 186||Vacuum rubber tubing, 8 mm diam.|
|1||501 01||BNC cable, 0.25 m|
|1||575 24||Screened cable, BNC/4 mm|
|1||additionally required: PC with Windows 7 or higher|
AM-214 is considered DANGEROUS GOODS. End user must have certification to ship item.