Effects of diabaticity on fusion of heavy nuclei in the dinuclear model ...

where
The volume is
V0 = 1
2 m0ϖ 2 R 2
0
. (A.5)
= W0 4π
3 R2
(A.6)
,
R0 = 1.2249fm · A 1/3
¯hϖ = 41MeV · A −1/3
The coordinates <strong>of</strong> the centers, z1 and z2, are calculated with the condition that the barrier
must have the same position on the z-axis as in the two-center oscillator [125]
E ′ = 1
2 m0ω 2 z 2
= 0 1
2
0
2
z1 m0ω z2
= 1 1
2
2
z2 m0ω z2.
(A.7)
2
The constants g, c, d, ω, α, z 1 and z 2 depend on the nuclear shapes, which are defined by
the collective coordinates: elongation λ, mass asymmetry η, neck parameter ε and deformations
βi <strong>of</strong> the axial symmetric fragments.
The parameters κ, µ and ω 0 are determined by a convenient interpolation method regarding
these parameters as functions <strong>of</strong> extrapolated masses <strong>of</strong> the fragments in order to achieve the
correct transition from the system <strong>of</strong> two separate nuclei to the compound-system configura-
tion. The additional undefined quantity f 0 has little influence on the total energy for a wider
range <strong>of</strong> values, and from liquid drop model calculations it was found that f0 =4ε isagood
approximation to the value giving minimal energy.
112