Elsevier

Nuclear Physics A

Volume 266, Issue 1, 2 August 1976, Pages 83-108
Nuclear Physics A

Neutron resonances in 185Re and 187Re

https://doi.org/10.1016/0375-9474(76)90284-0Get rights and content

Abstract

In a search for intermediate structure, neutron time-of-flight spectra corresponding to 1 and 4 MeV capture γ-ray thresholds were measured for the target isotopes 185, 187Re. The data were analyzed from the point of view of level spacings as well as intermediate structure. A method was developed for estimating the neutron widths of the resonances even in those cases where the neutron widths are comparable to the γ-widths. On the basis of this analysis it was decided which resonances were most likely to be due to p-wave capture. While some unusual behavior was observed, there is no conclusive evidence for intermediate structure. The statistics of level spacings agree with the long range ordering described in the theory of Dyson and Mehta, and are inconsistent with an uncorrelated Wigner distribution. Energies, estimated neutron widths and p-wave probabilities (if over 10 %) for 488 resonances in 185Re and 335 resonances in 187Re are tabulated for the energy range 24 eV to 2 keV.

References (16)

  • M.E. Rose et al.

    Westinghouse Electric Corporation Atomic Power Division Report,WAPD-SR-506

    (1954)
  • A. Stolovy et al.

    Phys. Rev.

    (1971)
  • F.J. Dyson

    J. Math. Phys.

    (1962)
    F.J. Dyson

    J. Math. Phys.

    (1962)
    F.J. Dyson

    J. Math. Phys.

    (1962)
  • F.J. Dyson et al.

    J. Math. Phys.

    (1963)
  • C. D. Jameset al., submitted for...
  • L.M. Bollinger et al.

    Phys. Rev.

    (1968)
  • M. Gyulassy et al.

    Experimental data, indexes, and techniques of obtaining a selected set of neutron resonance parameters

    Lawrence Livermore Lab. Report UCRL-50400

    (1972)
  • S.J. Friesenhahn et al.

    J. Nucl. Energy

    (1968)
There are more references available in the full text version of this article.

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    Ideno et al. (1972) performed neutron transmission measurements in 1971 with natural rhenium samples using the linear accelerator at the Japan Atomic Energy Research Institute up to 300 eV. In 1976, Namenson et al. (1976) measured neutron resonance parameters up to 2 keV in isotopically enriched rhenium samples using the Oak Ridge National Laboratory linear accelerator (ORELA). More recently (2012), Arboccò et al. (2013) measured the thermal total cross sections of 185Re and 187Re as part of neutron activation analyses performed at the Belgian Reactor 1 at Studiecentrum voor Kernenergie – Centre d’étude de l’énergie nucléaire (BR1, SCK•CEN).

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