Alpha decay, description

O 029 Draw a chart in your notebook to show alpha decay, beta decay, gamma decay, nuclear fusion, and nuclear fission. Write a description and give an example of each type of reaction. Illustrate each example with a drawing. 

The first description given by Perey to the newborn element was extremely brief the element is formed with alpha decay of actinium-227 in the reaction... 

Of the lower levels of Be the best known is that at 2.9 MeV which has been found in the (aa), (ya), [ pen), [dcf)y [py), [yn), pd), dt) and dn) reactions as well as in the decay of Li and B . The width of this level is about 1 MeV. The spin is 2 from the angular correlation of alpha particles in the (yen) stars for photon energies near threshold (Ml and E2 absorption), from the shape of the alpha particle spectrum to the 2.9 MeV state in the B ( a) reaction, and from angular correlations in the B ( a) reaction. The reduced width of the level, obtained from dispersion theory analysis of the B ((/a) peak, gives a value twice the sum rule limit, suggesting that the usual compound nucleus picture does not give a full description of this state. A level at 2.2 MeV is reported from the (dn) and (yt) reactions. 

Kemble s [4] description of alpha particle decay, we have called them [1] volcanic . 

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