An investigation of p+8He elastic scattering

The vector analyzing power and differential cross-section for the elastic scattering of 8He nucleus from polarized protons at 71 MeV/nucleon have been analyzed in the framework of the optical model potentials. Microscopic single folding (SF) optical potentials (OP) have been constructed based upon two different effective nucleon–nucleon (NN) interactions, namely Jeukenne–Lejeune–Mahaux (JLM) and BDM3Y1 effective interactions. The effect of 8He nuclear structure has been tested through two different choices of the nuclear density distribution. It is concluded that the nucleus 8He may be considered as a thick skin exotic nucleus. In order to investigate the vector analyzing power data, besides the Thomas phenomenological representation, three different forms of the spin–orbit (SO) part of the OP have been considered. These forms are based directly or indirectly upon the density distribution of 8He nucleus. It is found that SO potentials of larger root mean square radii are able to successfully describe the vector analyzing power data more than those of shorter radii.

[1]  T. Nakamura,et al.  Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon , 2013, 1302.4237.

[2]  I. Tanihata,et al.  Recent experimental progress in nuclear halo structure studies , 2013 .

[3]  S. Karataglidis,et al.  Analyzing power in elastic scattering of ^ He from a polarized proton target at 71 MeV/nucleon , 2011, 1106.3903.

[4]  A. N. Antonov,et al.  Microscopic calculations of 8He+p elastic scattering cross sections , 2010 .

[5]  A. N. Antonov,et al.  Calculations of 6He + p elastic-scattering cross-sections using folding approach and high-energy approximation for the optical potential , 2007, 0708.3586.

[6]  S. Karataglidis,et al.  Nucleon–nucleus scattering as a test of shell structure of some light mass exotic nuclei , 2007, nucl-th/0703026.

[7]  Y. Sakuragi,et al.  Application of the Jeukenne-Lejeune-Mahaux folding model to {alpha}-nucleus elastic scattering , 2006 .

[8]  M. S. Smith,et al.  Elastic scattering of the proton drip-line nucleus {sup 17}F , 2005 .

[9]  Y. Blumenfeld,et al.  Important pickup coupling effect on He 8 ( p , p ) elastic scattering , 2005 .

[10]  C. Gagliardi,et al.  Refractive effects in the scattering of loosely bound nuclei , 2004, nucl-ex/0402011.

[11]  Y. Oganessian,et al.  Interaction of 8He nuclei with α particles and protons at a beam energy of 26 MeV/n , 2002 .

[12]  I. Tanihata,et al.  Nuclear size and related topics , 2001 .

[13]  David Rosengrant,et al.  Isospin dependence of the microscopic JLM model , 2001 .

[14]  C. Samanta,et al.  Consistent analysis of proton elastic scattering from He and Li in the energy range of 25–75 AMeV , 2000 .

[15]  C. Gagliardi,et al.  Optical model potentials involving loosely bound p-shell nuclei around 10 MeV/nucleon , 1999, nucl-ex/9908022.

[16]  S. Karataglidis,et al.  Alternative evaluations of halos in nuclei , 1998, nucl-th/9811045.

[17]  J. Delaroche,et al.  The JLM model for nucleon scattering off strongly deformed nuclei up to 200 MeV , 1999 .

[18]  E. Bauge,et al.  Semimicroscopic nucleon-nucleus spherical optical model for nuclei with A>=40 at energies up to 200 MeV , 1998 .

[19]  I. Tanihata,et al.  Scattering of radioactive nuclei 6He and 3H by protons: Effects of neutron skin and halo in 6He, 8He, and 11Li , 1997 .

[20]  I. Tanihata,et al.  Elastic and inelastic scattering of exotic nuclei , 1997 .

[21]  N. Tajima,et al.  Extensive Hartree-Fock+BCS calculation with Skyrme SIII force , 1996, nucl-th/9604037.

[22]  I. Tanihata.  Neutron halo nuclei , 1996 .

[23]  W. Oertzen,et al.  Refractive alpha-nucleus scattering: a probe for the incompressibility of cold nuclear matter , 1995 .

[24]  H. Bohlen,et al.  Double-folding model for heavy-ion optical potential: Revised and applied to study 12C and 16O elastic scattering. , 1994, Physical review. C, Nuclear physics.

[25]  D. Aleksandrov,et al.  Experimental study of 8He + p elastic and inelastic scattering , 1993 .

[26]  H. Toki,et al.  Revelation of thick neutron skins in nuclei , 1992 .

[27]  Tomio Kobayashi,et al.  Determination of the density distribution and the correlation of halo neutrons in 11Li , 1992 .

[28]  Pickar,et al.  p-4He scattering: New data and a phase-shift analysis between 30 and 72 MeV. , 1989, Physical review. C, Nuclear physics.

[29]  T. Kobayashi,et al.  Measurement of interaction cross sections using isotope beams of Be and B and isospin dependence of the nuclear radii , 1988 .

[30]  Takahashi,et al.  Measurements of interaction cross sections and nuclear radii in the light p-shell region. , 1985, Physical review letters.

[31]  G. R. Satchler,et al.  A density-dependent interaction in the folding model for heavy-ion potentials , 1985 .

[32]  B. A. Brown,et al.  Folding-model analysis of elastic and inelastic α-particle scattering using a density-dependent force , 1984 .

[33]  J. Cook.  Hermes - an optical model search program including tensor potentials for projectile spins 0 to 3/2☆ , 1984 .

[34]  J. Bartel,et al.  Towards a better parametrisation of Skyrme-like effective forces: A critical study of the SkM force , 1982 .

[35]  G. R. Satchler,et al.  Folding model potentials from realistic interactions for heavy-ion scattering , 1979 .

[36]  G. Bertsch,et al.  Interactions for inelastic scattering derived from realistic potentials , 1977 .

[37]  André Lejeune,et al.  Optical-model potential in finite nuclei from Reid's hard core interaction , 1977 .

[38]  Robert R. Scheerbaum,et al.  Spin-orbit splitting in nuclei near closed shells: (I). Contribution of the two-body spin-orbit interaction , 1976 .

[39]  P. Quentin,et al.  Nuclear ground-state properties and self-consistent calculations with the skyrme interaction: (I). Spherical description , 1975 .

[40]  N. Giai,et al.  The nucleon-nucleus potential in the Hartree-Fock approximation with Skyrme's interaction , 1972 .