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A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states

Publication ,  Journal Article
Chen, Z; Walter, RL; Tornow, W; Weisel, GJ; Howell, CR
Published in: Journal of Physics G: Nuclear and Particle Physics
December 1, 2004

Data for σ(θ) and Ay(θ) previously obtained at the Triangle Universities Nuclear Laboratory for 120Sn(n, n) are combined with other measurements of σ(θ) and Ay(θ) to create an elastic-scattering database from 9.9 to 24 MeV. In addition, relatively recent high-accuracy measurements of the neutron total cross section σT for Sn from 5 to 80 MeV are combined with earlier σT data to form a detailed σT database from 0.24 to 80 MeV. All of these data are analysed in the framework of a dispersive optical model (DOM). The DOM is extended to negative energies to investigate properties of single-particle and single-hole bound states. The DOM also is used in calculations of compound-nucleus contributions to σ(θ), so that DOM predictions can be compared to σ(θ) measurements. Excellent agreement is obtained for the entire set of scattering data from 0.4 to 24 MeV, and for σT values from 0.05 to 80 MeV. Calculations of bound-state quantities are compared to values derived from experiment for energies down to -15 MeV. Reasonable agreement for the binding energies is achieved, while the predicted spectroscopic factors disagree somewhat with the values found in stripping and pickup experiments. Finally, the DOM is modified to investigate two features (volume absorption that is asymmetric about the Fermi energy and zero absorption in the vicinity of the Fermi energy) that have been ignored in many DOM models. These modifications have little effect on the agreement of the calculations with the scattering data or with the bound-state quantities.

Duke Scholars

Published In

Journal of Physics G: Nuclear and Particle Physics

DOI

ISSN

0954-3899

Publication Date

December 1, 2004

Volume

30

Issue

12

Start / End Page

1847 / 1859

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Chen, Z., Walter, R. L., Tornow, W., Weisel, G. J., & Howell, C. R. (2004). A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states. Journal of Physics G: Nuclear and Particle Physics, 30(12), 1847–1859. https://doi.org/10.1088/0954-3899/30/12/007
Chen, Z., R. L. Walter, W. Tornow, G. J. Weisel, and C. R. Howell. “A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states.” Journal of Physics G: Nuclear and Particle Physics 30, no. 12 (December 1, 2004): 1847–59. https://doi.org/10.1088/0954-3899/30/12/007.
Chen Z, Walter RL, Tornow W, Weisel GJ, Howell CR. A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states. Journal of Physics G: Nuclear and Particle Physics. 2004 Dec 1;30(12):1847–59.
Chen, Z., et al. “A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states.” Journal of Physics G: Nuclear and Particle Physics, vol. 30, no. 12, Dec. 2004, pp. 1847–59. Scopus, doi:10.1088/0954-3899/30/12/007.
Chen Z, Walter RL, Tornow W, Weisel GJ, Howell CR. A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states. Journal of Physics G: Nuclear and Particle Physics. 2004 Dec 1;30(12):1847–1859.
Journal cover image

Published In

Journal of Physics G: Nuclear and Particle Physics

DOI

ISSN

0954-3899

Publication Date

December 1, 2004

Volume

30

Issue

12

Start / End Page

1847 / 1859

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics