1. The study of alpha-particle decay schemes of heavy nuclei
- Author
-
Desmarais, D. and Duggan, J.L.
- Subjects
Nuclear physics -- Study and teaching ,Alpha rays -- Tests, problems and exercises ,Alpha decay -- Tests, problems and exercises ,Nuclear structure -- Tests, problems and exercises ,Physics - Abstract
A nuclear experiment has been designed for use in the undergraduate laboratory. Following a theoretical treatment of alpha barrier penetration and the kinematics and Q value of alpha decay, a semiclassical calculation is made for the half-life for alpha decay, followed by a more exact quantum mechanical result. The decay schemes of three commercially available sources are studied. The branching ratios to various excited states in the residual nuclei are measured along with the precise energies of the decay. The absolute activity of one source ([sub.241.Am]) is determined from its measured alpha activity, and from its gamma activity as measured by a low-energy photon detector.
- Published
- 1990