Speaker
Description
A diffusion cloud chamber was used to determine the energy of α-particles emitted from an $^2$$^4$$^1$$Am$ source via Geiger's range–energy law,
$R = kE^n$
The source was collimated to emit from a point with an angular spread of $108$$^\circ$, and track ranges were recorded using a camera positioned perpendicular to the theoretical range axis. Custom software was developed to calibrate the setup against a reference measurement and digitize the recorded tracks. Over $7$ minutes of footage, $663$ tracks were measured, of which $13$ were excluded as anomalous, exceeding the physically expected range. The mean measured range, $R_E = 2.215cm$, was found to be lower than the theoretical value predicted by Geiger's law, $R_G = 2.6cm$. This deviation is attributed to geometric foreshortening under perpendicular 3D projection and is consistent with the assumed isotropic angular distribution of emission, confirming the validity of the dataset.
Author and Speaker: Shivam Banerjee
Affiliation: Savitribai Phule Pune University
Other Fields of Research (Track) for Abstract
Nuclear Physics, Particle Physics
| Nature of work | Experimental |
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