Effects of momentum-dependent nuclear potential on two-nucleon correlation functions and light cluster production in intermediate energy heavy-ion collisions

Chen, Lie‐Wen; Ko, Che Ming; Li, Bao-An

doi:10.1103/physrevc.69.054606

Cited by 72 publications

(10 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The x parameter in the MDI interaction is introduced to vary the density dependence of the nuclear symmetry energy while keeping other properties of the nuclear equation of state fixed [36], and it can be adjusted to mimic the predictions of microscopic and/or phenomenological many-body theories on the density dependence of nuclear matter symmetry energy. We would like to point out that the MDI interaction has been extensively used in the transport model for studying isospin effects in intermediate-energy heavy-ion collisions induced by neutron-rich nuclei [36,[110][111][112][113][114][115][116][117], in the study of the thermal properties of asymmetric nuclear matter [118,119], and in the study of compact star physics [24,120,121]. In particular, the isospin diffusion data from NSCL/MSU have constrained the value of x to between 0 and −1 for nuclear matter densities less than about 1.2ρ 0 [36].…”

Section: Isospin-and Momentum-dependent MDI Interactionmentioning

confidence: 99%

Single-nucleon potential decomposition of the nuclear symmetry energy

et al. 2012

Self Cite

View full text Add to dashboard Cite

The nuclear symmetry energy $E_{sym}(\rho)$ and its density slope $L(\rho)$ can be decomposed analytically in terms of the single-nucleon potential in isospin asymmetric nuclear matter. Using three popular nuclear effective interaction models which have been extensively used in nuclear structure and reaction studies, namely, the isospin and momentum dependent MDI interaction model, the Skyrme Hartree-Fock approach and the Gogny Hartree-Fock approach, we analyze the contribution of different terms in the single-nucleon potential to the $E_{sym}(\rho)$ and $L(\rho)$. Our results show that the observed different density behaviors of $E_{sym}(\rho)$ for different interactions are essentially due to the variation of the symmetry potential $U_{sym,1}(\rho,k)$. Furthermore, we find that the contribution of the second-order symmetry potential $U_{sym,2}(\rho,k)$ to the $L(\rho)$ generally cannot be neglected. Moreover, our results demonstrate that the magnitude of the $U_{sym,2}(\rho,k)$ is generally comparable with that of $U_{sym,1}(\rho,k)$, indicating the second-order symmetry potential $U_{sym,2}(\rho,k)$ may have significant corrections to the widely used Lane approximation to the single-nucleon potential in extremely neutron(proton)-rich nuclear matter.Comment: 16 pages, 13 figures, 1 big table. Results of BSk14-17, Rsigma-fit, and Gsigma-fit in the big table updated, typos fixed. Published version in PR

show abstract

Section: Isospin-and Momentum-dependent MDI Interactionmentioning

confidence: 99%

Single-nucleon potential decomposition of the nuclear symmetry energy

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a consequence, the mass dependence of E bal is also expected to vary strongly with the colliding geometry. The momentum dependent interactions (MDI) are also known to have sizable effects on the collective flow as well as on its disappearance [13,14,17,18,[20][21][22] in addition to multifragmentation [23][24][25] and particle production [26]. Recently, Sood and Puri [13] presented a systematic study for understanding the role of MDI in transverse flow as well as on its disappearance for the full range of mass (from 12 C + 12 C to 197 Au + 197 Au).…”

Section: Introductionmentioning

confidence: 99%

Importance of momentum dependent interactions at the energy of vanishing flow

Chugh

Puri

2010

Phys. Rev. C

View full text Add to dashboard Cite

We study the balance energy (E bal ) as a function of combined system mass for different colliding geometries, which range from central to semiperipheral ones. We find that E bal follows a power law behavior (∝A τ ) at all colliding geometries. We also study the effect of momentum dependent interactions on E bal as well as on its mass dependence. We find that the inclusion of momentum dependent interactions changes the value of τ drastically at peripheral geometries in agreement with other calculations.

show abstract

“…To ease the following discussions, we briefly describe here the isospin-and momentum-dependent interaction (MDI) used in the IBUU11 and the nucleon density profiles with different sizes of neutron skins used in initializing the two colliding nuclei. The momentum dependence of both the isoscalar [44][45][46][47][48] and isovector [43,[49][50][51] parts of the nuclear interaction is important in understanding not only many phenomena in intermediate-energy heavy-ion collisions but also thermodynamical properties of isospin-asymmetric nuclear matter [52][53][54]. The MDI mean-field potential for a nucleon with momentum p and isospin τ can be written as [49] …”

Section: Nuclear Symmetry Energy and Initialization In Ibuu11mentioning

confidence: 99%

Influence of neutron-skin thickness on the π−/π+ ratio in Pb + Pb collisions

Wei

et al. 2014

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Within an isospin-and momentum-dependent transport model (IBUU11) using as an input nucleon density profiles from Hartree-Fock calculations based on a modified Skyrme-like (MSL) model, we study the influence of the uncertainty of the neutron skin thickness on the π − /π + ratio in both central and peripheral Pb + Pb collisions at beam energies of 400 MeV/nucleon and 1000 MeV/nucleon. Within the current experimental uncertainty range of neutron skin in 208 Pb, while the neutron skin effect on the π − /π + ratio is negligible in central reactions at both energies, it increases gradually with increasing impact parameter and becomes comparable with or even larger than the symmetry energy effect in peripheral collisions especially at 400 MeV/nucleon. Moreover, we find that while the π − /π + ratio is larger with a softer E sym (ρ) in central collisions, above certain impact parameters depending on the size of the neutron skin, a stiffer E sym (ρ) can lead to a larger π − /π + ratio as most of the pions are produced at densities below the saturation density in these peripheral reactions. Therefore, a clear impact parameter selection is important to extract reliable information about the E sym (ρ) at suprasaturation densities (size of neutron skin) from the π − /π + ratio in central (peripheral) heavy-ion collisions.

show abstract

Effects of momentum-dependent nuclear potential on two-nucleon correlation functions and light cluster production in intermediate energy heavy-ion collisions

Cited by 72 publications

References 82 publications

Single-nucleon potential decomposition of the nuclear symmetry energy

Single-nucleon potential decomposition of the nuclear symmetry energy

Importance of momentum dependent interactions at the energy of vanishing flow

Influence of neutron-skin thickness on the π−/π+ ratio in Pb + Pb collisions

Contact Info

Product

Resources

About