Skip to main content
Log in

Directed transverse flow and its disappearance for asymmetric reactions

  • Physics of Elementary Particles and Atomic Nuclei. Theory
  • Published:
Physics of Particles and Nuclei Letters Aims and scope Submit manuscript

Abstract

We study the directed transverse flow for mass asymmetry reactions. This is done by keeping the target fixed and varying the projectile mass from 4He to 131Xe. We find that directed transverse flow is sensitive to the mass of the projectile. We also study the disappearance of flow at a particular impact parameter called Geometry of Vanishing Flow (GVF) for such mass asymmetry reactions. Our results indicate that GVF is sensitive to the beam energy as well as to the mass of the projectile.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. P. Danielewicz, R. Lacey, and W. Lynch, “Determination of equation of state of dense matter,” Science 298, 1592 (2002).

    Article  ADS  Google Scholar 

  2. Y. Zhang and Z. Li, “Elliptic flow and system size dependence of transition energies at intermediate energies,” Phys.Rev., Ser. C 74, 014602 (2006); M. W. Zhang et al., “Onset of flow of charged fragments in Au-Au collisions,” Phys. Rev., Ser. C 42, R491 (1990); D. Beavis et al., “Collective motion in Ar+Pb collision at beam energies between 400 and 1800 MeV/nucleon,” Phys. 1800 MeV/nucleon,” Phys. Rev., Ser. C 45, 299 (1999).

    Article  ADS  Google Scholar 

  3. B. Hong et al., “Charged pion production in Ru96 + Ru96 collisions at 400 and 1528 A MeV,” Phys. Rev., Ser. C 71, 034902 (2002).

    Article  ADS  Google Scholar 

  4. Q. Pan and P. Danielewicz, “From sideward flow to nuclear compressibility,” Phys. Rev. Lett. 70, 2062 (1993); V. Ramillien et al., “Sideward flow in Au + Au collisions at 400 A MeV,” Nucl. Phys., Ser. A 587, 802 (1995).

    Article  ADS  Google Scholar 

  5. J. Lukasik et al., “Directed and elliptic flow in Au197 + Au197 at intermediate energies,” Phys. Lett., Ser. B 608, 223 (2005).

    Article  ADS  Google Scholar 

  6. C. A. Ogilvie et al., “Transverse collective motion in intermediate-energy heavy-ion collisions,” Phys. Rev., Ser. C 40, 2592 (1989); B. Blättel et al., “Origin of transverse momentum in relativistic heavy-ion collisions: microscopic study,” Phys. Rev., Ser. C 43, 2728 (1991).

    Article  ADS  Google Scholar 

  7. A. Andronic et al., “Directed flow in Au + Au, Xe + Csl and Ni + Ni collisions and the nuclear equation of state,” Phys. Rev., Ser. C 67, 034907 (2003); A. D. Sood and R. K. Puri, “Mass dependence of disappearance of transverse in-plane flow,” Phys. Rev., Ser. C 69, 054612 (2004); A. Andronic et al., “Systematic study of the energy of vanishing flow: Role of equations of state and cross-sections,” Phys. Rev., Ser. C 73, 067602 (2006); A. Andronic et al., “Influence of momentum-dependence interactions on balance energy and mass dependence,” Eur. Phys. J., Ser. A 30, 571 (2006).

    Article  ADS  Google Scholar 

  8. S. Goyal, “Role of colliding geometry on the balance energy of mass-asymmetric systems,” Phys. Rev., Ser. C 83, 047604 (2011); S. Goyal and R. K. Puri, “On the sensitivity of the energy of vanishing flow towards mass asymmetry of colliding nuclei,” Nucl. Phys., Ser. A 853, 164 (2011).

    Article  ADS  Google Scholar 

  9. B. A. Li et al., “Isospin dependence of collective flow in Heavy-ion collisions at intermediate energies,” Phys. Rev. Lett. 76, 4492 (1996).

    Article  ADS  Google Scholar 

  10. R. Pak et al., “Isospin dependence of collective transverse flow in nuclear collisions,” Phys. Rev. Lett. 78, 1022 (1997); R. Pak et al., “Isospin dependence of the balance energy,” 78, 1026 (1997).

    Article  ADS  Google Scholar 

  11. S. Gautam et al., “Sensitivity of the transverse flow to the symmetry energy,” Phys. Rev., Ser. C 83, 034606 (2011); V. Kaur, S. Kumar, and R. K. Puri, “On the elliptical flow and asymmetry of the colliding nuclei,” Phys. Lett., Ser. B 697, 512 (2011).

    Article  ADS  Google Scholar 

  12. D. Krofcheck et al., “Disappearance of flow in heavyion collisions,” Phys. Rev. Lett. 63, 2028 (1989).

    Article  ADS  Google Scholar 

  13. G. D. Westfall et al., “Mass dependence of disappearance of flow in nuclear collisions,” Phys. Rev. Lett. 71, 1986 (1993); A. Buta et al., “Azimuthal correlation functions and the energy of vanishing flow in nucleus-nucleus collisions,” Nucl. Phys., Ser. A 584, 397 (1995).

    Article  ADS  Google Scholar 

  14. A. D. Sood and R. K. Puri, “Systematic study of energy of vanishing flow: role of equations of state and cross-sections,” Phys. Rev., Ser. C 73, 067602 (2006); D. J. Majestro et al., “Disappearance of flow in Au+Au collisions,” Phys. Rev., Ser. C 61, 021602(R) (2000); A. D. Sood and R. K. Puri, “Nuclear dynamics at the balance energy,” Phys. Rev., Ser. C 70, 034611 (2004); S. Kumar et al., “Impact parameter dependence of the disappearance of flow and in-medium nucleon-nucleon cross-section,” Phys. Rev., Ser. C 58, 3494 (1998).

    Article  ADS  Google Scholar 

  15. L. Scalone, M. Colonna, and M. Di Toro, “Transverse flows in charge asymmetric collisions,” Phys. Lett., Ser. B 461, 9 (1991).

    Article  ADS  Google Scholar 

  16. S. Gautam et al., “Isospin effects on the energy of vanishing flow in heavy-ion collisions,” J. Phys., Ser. G 37, 085102 (2010); S. Gautam and A. D. Sood, “Isospin effects on the mass dependence of the balance energy,” Phys. Rev., Ser. C 82, 014604 (2010); S. Gautam et al., “Isospin effects in the disappearance of flow as a function of colliding geometry,” Phys. Rev., Ser. C 83, 014603 (2011); S. Gautam and R. K. Puri, “Participation-spectator matter and thermalization of neutron-rich systems at the energy of vanishing flow,” Phys. Rev., Ser. C 85, 067601 (2012); S. Gautam, R. Kumari, and R. K. Puri, “Sensitivity of transverse flow toward isospin-dependent cross-sections and symmetry energy,” Phys. Rev., Ser. C 86, 034607 (2012).

    Article  ADS  Google Scholar 

  17. S. Kumar et al., “Elliptic flow and isospin effects in heavy-ion collisions at intermediate energies,” Phys. Rev., Ser. C 81, 014611 (2010).

    Article  ADS  Google Scholar 

  18. S. Kumar and R. K. Puri, “Effect of symmetry energy on nuclear stopping and its relation to the production of light charged fragments,” Phys. Rev., Ser. C 81, 014601 (2010).

    Article  ADS  Google Scholar 

  19. R. Chugh and A. D. Sood, “Geometry of vanishing flow: a new probe to determine the in-medium nucleon-nucleon cross-section,” Parma. J. Phys. 77, 289 (2011); S. Goyal, “Role of the masses asymmetry of reaction on the geometry of vanishing flow,” Nucl. Phys., Ser. A 856, 154 (2011).

    Google Scholar 

  20. J. Aichelin and H. Stöcker, “Quantum molecular dynamics—A novel approach to N-body correlations in heavy-ion collisions,” Phys. Lett., Ser. B 176, 14 (1986).

    Article  ADS  Google Scholar 

  21. J. Cugnon, T. Mizutani, and J. Vandermeulen, “Equilibrations in relativistic nuclear collisions. A Monte Carlo calculation,” Nucl. Phys., Ser. A 352, 505 (1981).

    Article  ADS  Google Scholar 

  22. E. Lehmann et al., “Consequences of a covariant description of heavy-ion reactions at intermediate energies,” Phys. Rev., Ser. C 51, 2113 (1995); E. Lehmann et al., “Relativistic versus nonrelativistic quantum molecular dynamics,” Prog. Part. Nucl. Phys. 30, 219 (1993).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Sakshi Gautam.

Additional information

The article is published in the original.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Lovejot, Gautam, S. Directed transverse flow and its disappearance for asymmetric reactions. Phys. Part. Nuclei Lett. 11, 232–237 (2014). https://doi.org/10.1134/S1547477114030121

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1547477114030121

Keywords

Navigation