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Dipole response of 76Se above 4 MeV

Publication ,  Journal Article
Goddard, PM; Cooper, N; Werner, V; Rusev, G; Stevenson, PD; Rios, A; Bernards, C; Chakraborty, A; Crider, BP; Glorius, J; Ilieva, RS; Kwan, E ...
Published in: Physical Review C - Nuclear Physics
December 6, 2013

The dipole response of 3476Se in the energy range from 4 to 9 MeV has been analyzed using a (γâ-, γ′) polarized photon scattering technique, performed at the High Intensity γ-Ray Source facility at Triangle Universities Nuclear Laboratory, to complement previous work performed using unpolarized photons. The results of this work offer both an enhanced sensitivity scan of the dipole response and an unambiguous determination of the parities of the observed J=1 states. The dipole response is found to be dominated by E1 excitations, and can reasonably be attributed to a pygmy dipole resonance. Evidence is presented to suggest that a significant amount of directly unobserved excitation strength is present in the region, due to unobserved branching transitions in the decays of resonantly excited states. The dipole response of the region is underestimated when considering only ground state decay branches. We investigate the electric dipole response theoretically, performing calculations in a three-dimensional (3D) Cartesian-basis time-dependent Skyrme-Hartree-Fock framework. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

December 6, 2013

Volume

88

Issue

6

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Goddard, P. M., Cooper, N., Werner, V., Rusev, G., Stevenson, P. D., Rios, A., … Yates, S. W. (2013). Dipole response of 76Se above 4 MeV. Physical Review C - Nuclear Physics, 88(6). https://doi.org/10.1103/PhysRevC.88.064308
Goddard, P. M., N. Cooper, V. Werner, G. Rusev, P. D. Stevenson, A. Rios, C. Bernards, et al. “Dipole response of 76Se above 4 MeV.” Physical Review C - Nuclear Physics 88, no. 6 (December 6, 2013). https://doi.org/10.1103/PhysRevC.88.064308.
Goddard PM, Cooper N, Werner V, Rusev G, Stevenson PD, Rios A, et al. Dipole response of 76Se above 4 MeV. Physical Review C - Nuclear Physics. 2013 Dec 6;88(6).
Goddard, P. M., et al. “Dipole response of 76Se above 4 MeV.” Physical Review C - Nuclear Physics, vol. 88, no. 6, Dec. 2013. Scopus, doi:10.1103/PhysRevC.88.064308.
Goddard PM, Cooper N, Werner V, Rusev G, Stevenson PD, Rios A, Bernards C, Chakraborty A, Crider BP, Glorius J, Ilieva RS, Kelley JH, Kwan E, Peters EE, Pietralla N, Raut R, Romig C, Savran D, Schnorrenberger L, Smith MK, Sonnabend K, Tonchev AP, Tornow W, Yates SW. Dipole response of 76Se above 4 MeV. Physical Review C - Nuclear Physics. 2013 Dec 6;88(6).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

December 6, 2013

Volume

88

Issue

6

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics