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Assault frequency and preformation probability of the alpha emission process

Abstract : A study of the assault frequency and preformation factor of the α-decay description is performed from the experimental α-decay constant and the penetration probabilities calculated from the generalized liquid-drop model (GLDM) potential barriers. To determine the assault frequency a quantum-mechanical method using a harmonic oscillator is introduced and leads to values of around 1021 s−1, similar to the ones calculated within the classical method. The preformation probability is around 10−1-10−2. The results for even-even Po isotopes are discussed for illustration. While the assault frequency presents only a shallow minimum in the vicinity of the magic neutron number 126, the preformation factor and mainly the penetrability probability diminish strongly around N=126.
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Submitted on : Thursday, November 3, 2011 - 1:58:53 PM
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H.F. Zhang, Guy Royer, J.Q. Li. Assault frequency and preformation probability of the alpha emission process. Physical Review C, American Physical Society, 2011, 84, pp.027303. ⟨10.1103/PhysRevC.84.027303⟩. ⟨in2p3-00637971⟩

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