Alpha-Decay Barrier Penetrabilities with an Exponential Nuclear Potential: Even-Even Nuclei

Spectroscopy of the proton drip-line nucleus203Fr

“…Based on the α-particle and conversion-electron yields, a branching ratio of 20(4)% for the α decay of the 1/2 + isomer was obtained. Additionally, a reduced α-emission width of 51 keV was extracted for this decay using the method developed by Rasmussen [44], resulting in a hindrance factor of 1.1 as compared with the ground-state α decay of 202 Rn [45]. This is a sign of a favored α decay between states of equal spin and parity.…”

Decay of201–203Raand200–202Fr

“…[22]. We deduced the reduced α-decay width using the Rasmussen prescription [21] assuming L = 0 and obtained δ [23] and radon [24,25] -decay width (keV) α reduced …”

Experimental study of the decays of112Cs and111Xe

“…In order to estimate the Q α value for 112 Cs from the available information, an assumption had to be made. Since away from the Z=50 shell closure, at Z=53, 55, shape deformation is present (of the order of β = 0.1 for 112 Cs [21]), the reduced α-decay width [22] the neighbour 114 Cs and δ 2 analysis in the spherical approach, we assume a similar potential tunnelled by the alpha particle for the decay of the two neighboring oddodd cesium isotopes. Under this ansatz the α branching ratio can be calculated as a function of the Q α value for l=0 and l=2, as shown in Figure 5.…”