C1.1.3.4 Analysis of Rutherford Scattering

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 C1.1.3.4, 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 NOT INCLUDED - SOURCE LOCAL 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.  THIS ITEM IS NOT INCLUDED