H Zheng and M Colonna INFN Laboratori Nazionali del Sud Outline Introduction BNV model and results without MDI Results from HFRPA Literature EoS with MDI Our results Conclusions and outlook ID: 816088
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Slide1
Effects of symmetry energy and momentum dependent interaction on low-energy reaction mechanisms
H. Zheng and M. ColonnaINFN - Laboratori Nazionali del Sud
Slide2Outline
IntroductionBNV model and results without MDIResults from HF+RPA (Literature)EoS with MDI
Our resultsConclusions and outlook
Slide3A.W. Steiner et al., Phys. Rep.
411
, 325 (2005)
Equation of State (EoS) is important
EoS
Slide4Experiments and theory
L.G. Cao et al., arXiv: 1504.07166v1
Excited nucleus
collective modes
Methods
QM: HF+RPA
X. Roca-Maza et al., PRC 85, 024601 (2012)
Transport model: BNV
(TWINGO, Grid)
V. Baran et al., PRC
88
, 044610 (2013)
See Prof. V. Baran’s talk
on Tuesday
Slide5M. Urban, PRC
85
, 034322 (2012)
The strength function
Slide6Semiclassical approach (BNV)
V. Baran et al., PRC 88, 044610 (2013)
We use test particle method to solve the equations.
Slide7Semiclassical approach (BNV)
Using the BNV model to study the resonances:
EoS
Produce the gs, perturb the gs and follow the dynamical evolution
Extract the energy spectrum
Slide8Effective EoS without MDI
Slide9Results without MDI
Sn isotopes
V. Baran et al., PRC
88
, 044610 (2013)
green soft
red stiff
blue super stiff
Pb208
Sn140
M. Urban, PRC
85
, 034322 (2012)
Slide10X. Roca-Maza et al., PRC 85, 024601 (2012)
IVGDR and ISGDR in Ni68, Sn132 and Pb208
(HF+RPA)
V. Baran et al., PRC
88
, 044610 (2013)
Slide11Momentum dependent interaction (EoS)
Ad.R. Raduta et al., EPJA
50
, 24 (2014)
Slide12without MDI
with MDI
Ni68, Results Comparison
The PDR and IVGDR
depend on the EoS and MDI.
X. Roca-Maza et al., PRC 85, 024601 (2012)
Slide13without MDI
with MDI
Sn132, Results Comparison
X. Roca-Maza et al., PRC 85, 024601 (2012)
Slide14without MDI
with MDI
Pb208, Results Comparison
X. Roca-Maza et al., PRC 85, 024601 (2012)
X. Roca-Maza et al., PRC 86, 031306 (2012)
Sami28
Slide15Conclusions and outlook
Conclusions:
The MF transport model (TWINGO) with MDI can produce similar IVGDR results with HF+RPA, this could indicate that the shell effects are not important in IVGDR
IVGDR depends on the EoS. The stiffer the EoS, the lower IVGDR energy. It doesn’t matter with the EoS with/without MDI.
MDI shifts the IVGDR energy to a higher value
Outlook:
We will look at ISGDR (in progress)
We will also look at the transition density (in progress)
Is PDR an isoscalar-like collective motion? Comparing with HF+RPA transition density
Slide16