Constrained Molecular dynamics Model
M.Papa,T.Maruyama and
CoMD: constraining semiclassical N-body equations A.Bonasera PRC 64 024612 -15
of motion to obtain quantum features and
to restore L conservation: tcpuαA2
CoMD Ground state correlations
Px
<T>/A~0 in others N-body approach
X
Px
No
Cooling <>Constraint
<T>/A~3/5 Ef
r, p cs
X
parameters
Last improvements
●Total angular momentum conservation
Usually as due to the N-N scattering processes:
Li1,2=(r1-r2)^p1i Lf1,2=(r1-r2)^p1f p1f≠p1f
Li1,2≠Lf1,2
This problem has been solved with a suitable algorithm which
further constrains the equation of motion.
∑Lik,m=∑Lfk,m
●Different options for the Isospin meanfield term
2u
G1 
1 u
G2  1
G3  u 1/ 2


V '  GV
u
( )

Bao-An Li et al, PRL 78(1997)1644
sym
sym
j i
i j
i, j
i, j
G .S .
40Ca+48Ca
10MeV/A
We can have a 20%-30%
reduction of the fusion
cross section
L not conserved
Flow
Soft
Stiff
Others results have been given
to J.Aichelin for b=1fm and b=7fm
b=3fm
L conserved
b=5fm