Skip to main content
construction release_alert
Scholars@Duke will be undergoing maintenance April 11-15. Some features may be unavailable during this time.
cancel

Dipole response of 238U to polarized photons below the neutron separation energy

Publication ,  Journal Article
Hammond, SL; Adekola, AS; Angell, CT; Karwowski, HJ; Kwan, E; Rusev, G; Tonchev, AP; Tornow, W; Howell, CR; Kelley, JH
Published in: Physical Review C - Nuclear Physics
April 2, 2012

Nuclear resonance fluorescence experiments were carried out at the High-Intensity γ-ray Source facility at Triangle Universities Nuclear Laboratory to characterize the low-energy dipole structure of 238U using 100% linearly polarized photon beams from 2.0 to 6.2 MeV. 113 transitions corresponding to de-excitations to the ground state in 238U were observed and the energy, spin, parity, integrated cross section, reduced width, and branching ratio were determined for each of these identified levels. The total E1 γ-ray interaction cross section was calculated and it was deduced that the observed concentration of low-lying E1 transitions were excited from the low-energy tail of the giant dipole resonance and were not a pygmy dipole resonance. Comparisons were made between quasiparticle random-phase approximation calculations and the experimentally observed strength. The observed and predicted M1 strength agreed well with each other. However, there was no similar agreement for the E1 strength. © 2012 American Physical Society.

Duke Scholars

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

April 2, 2012

Volume

85

Issue

4

Related Subject Headings

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

Citation

APA
Chicago
ICMJE
MLA
NLM
Hammond, S. L., Adekola, A. S., Angell, C. T., Karwowski, H. J., Kwan, E., Rusev, G., … Kelley, J. H. (2012). Dipole response of 238U to polarized photons below the neutron separation energy. Physical Review C - Nuclear Physics, 85(4). https://doi.org/10.1103/PhysRevC.85.044302
Hammond, S. L., A. S. Adekola, C. T. Angell, H. J. Karwowski, E. Kwan, G. Rusev, A. P. Tonchev, W. Tornow, C. R. Howell, and J. H. Kelley. “Dipole response of 238U to polarized photons below the neutron separation energy.” Physical Review C - Nuclear Physics 85, no. 4 (April 2, 2012). https://doi.org/10.1103/PhysRevC.85.044302.
Hammond SL, Adekola AS, Angell CT, Karwowski HJ, Kwan E, Rusev G, et al. Dipole response of 238U to polarized photons below the neutron separation energy. Physical Review C - Nuclear Physics. 2012 Apr 2;85(4).
Hammond, S. L., et al. “Dipole response of 238U to polarized photons below the neutron separation energy.” Physical Review C - Nuclear Physics, vol. 85, no. 4, Apr. 2012. Scopus, doi:10.1103/PhysRevC.85.044302.
Hammond SL, Adekola AS, Angell CT, Karwowski HJ, Kwan E, Rusev G, Tonchev AP, Tornow W, Howell CR, Kelley JH. Dipole response of 238U to polarized photons below the neutron separation energy. Physical Review C - Nuclear Physics. 2012 Apr 2;85(4).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

April 2, 2012

Volume

85

Issue

4

Related Subject Headings

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