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Photoneutron cross sections for samarium isotopes : toward a unified understanding of (γ,n) and (n,γ) reactions in the rare earth region

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Abstract
Photoneutron cross sections were measured for the seven stable samarium isotopes Sm-144,Sm-147,Sm-148,Sm-149,Sm-150,Sm-152,Sm-154 near the neutron threshold with quasi-monochromatic laser-Compton scattering gamma rays. Our photoneutron cross sections are found to be low by 20%-37% relative to existing data. The photoneutron data are analyzed with the TALYS reaction code by considering the Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and the axially symmetric deformed Gogny HFB plus QRPA model of the E1 gamma-ray strength. Using the gamma-ray strength function constrained by the present photoneutron data, we made a thorough analysis of the reverse (n,gamma) cross sections including the radioactive nucleus Sm-151 with a half-life of 90 yr. The radiative neutron capture cross section for Sm-153 with the half-life of 1.928 d is deduced with the gamma-ray strength function method.
Keywords
NUCLEAR-PHYSICS, NEUTRON-CAPTURE, PHOTONS, RAYS, GIANT DIPOLE RESONANCE, NUCLEOSYNTHESIS, ASTROPHYSICS, NEWSUBARU, SYSTEM, SM-149

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Chicago
Filipescu, DM, I Gheorghe, H Utsunomiya, S Goriely, T Renstrøm, H-T Nyhus, O Tesileanu, et al. 2014. “Photoneutron Cross Sections for Samarium Isotopes : Toward a Unified Understanding of (γ,n) and (n,γ) Reactions in the Rare Earth Region.” Physical Review C 90 (6).
APA
Filipescu, D., Gheorghe, I., Utsunomiya, H., Goriely, S., Renstrøm, T., Nyhus, H.-T., Tesileanu, O., et al. (2014). Photoneutron cross sections for samarium isotopes : toward a unified understanding of (γ,n) and (n,γ) reactions in the rare earth region. PHYSICAL REVIEW C, 90(6).
Vancouver
1.
Filipescu D, Gheorghe I, Utsunomiya H, Goriely S, Renstrøm T, Nyhus H-T, et al. Photoneutron cross sections for samarium isotopes : toward a unified understanding of (γ,n) and (n,γ) reactions in the rare earth region. PHYSICAL REVIEW C. 2014;90(6).
MLA
Filipescu, DM, I Gheorghe, H Utsunomiya, et al. “Photoneutron Cross Sections for Samarium Isotopes : Toward a Unified Understanding of (γ,n) and (n,γ) Reactions in the Rare Earth Region.” PHYSICAL REVIEW C 90.6 (2014): n. pag. Print.
@article{5830686,
  abstract     = {Photoneutron cross sections were measured for the seven stable samarium isotopes Sm-144,Sm-147,Sm-148,Sm-149,Sm-150,Sm-152,Sm-154 near the neutron threshold with quasi-monochromatic laser-Compton scattering gamma rays. Our photoneutron cross sections are found to be low by 20\%-37\% relative to existing data. The photoneutron data are analyzed with the TALYS reaction code by considering the Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and the axially symmetric deformed Gogny HFB plus QRPA model of the E1 gamma-ray strength. Using the gamma-ray strength function constrained by the present photoneutron data, we made a thorough analysis of the reverse (n,gamma) cross sections including the radioactive nucleus Sm-151 with a half-life of 90 yr. The radiative neutron capture cross section for Sm-153 with the half-life of 1.928 d is deduced with the gamma-ray strength function method.},
  articleno    = {064616},
  author       = {Filipescu, DM and Gheorghe, I and Utsunomiya, H and Goriely, S and Renstr{\o}m, T and Nyhus, H-T and Tesileanu, O and Glodariu, T and Shima, T and Takahisa, K and Miyamoto, S and Lui, Y-W and Hilaire, S and P{\'e}ru, S and Martini, Marco and Koning, AJ},
  issn         = {0556-2813},
  journal      = {PHYSICAL REVIEW C},
  keyword      = {NUCLEAR-PHYSICS,NEUTRON-CAPTURE,PHOTONS,RAYS,GIANT DIPOLE RESONANCE,NUCLEOSYNTHESIS,ASTROPHYSICS,NEWSUBARU,SYSTEM,SM-149},
  language     = {eng},
  number       = {6},
  pages        = {9},
  title        = {Photoneutron cross sections for samarium isotopes : toward a unified understanding of (\ensuremath{\gamma},n) and (n,\ensuremath{\gamma}) reactions in the rare earth region},
  url          = {http://dx.doi.org/10.1103/PhysRevC.90.064616},
  volume       = {90},
  year         = {2014},
}

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