Elsevier

Nuclear Physics A

Volume 543, Issue 3, 6 July 1992, Pages 517-557
Nuclear Physics A

Phenomenological statistical analysis of level densities, decay widths and lifetimes of excited nuclei

https://doi.org/10.1016/0375-9474(92)90278-RGet rights and content

Abstract

All existing data on the level densities, decay widths and lifetimes of excited nuclei have been analyzed in the framework of the statistical model in order to better determine the parameters of the phenomenological systematics of the nuclear level density. Data on level densities of several hundred nuclides obtained in the excitation energy range from 2 up to 20 MeV were used. The level densities of nuclei with large deformation (at the saddle point) have been studied by analyzing the data on the nuetron emission and fission partial width ratio Γn/Γf, and the values of the fission barrier heights Bf, the level density parameters ratio af/an and the saddle point shell corrections δWs.p. have been extracted. The influence of shell and collective effects on the level density and the decay widths of nuclei which have different excitation energies and deformations has been studied.

References (63)

  • T. Ericson

    Adv. Phys.

    (1960)
  • J.R. Huizenga et al.

    Ann. Rev. Nucl. Sci.

    (1972)
  • A.V. Ignatyuk et al.

    Yad. Fiz.

    (1975)
  • K.H. Schmidt et al.

    Z. Phys.

    (1982)
  • A.S. Iljinov et al.

    Nukleonika

    (1980)
    A.S. Iljinov et al.

    preprint INR AS USSR P-0064

    (1977)
  • T.S. Belanova et al.
  • E. Erba et al.

    Nuovo Cim.

    (1961)
  • M. Hillman et al.

    Phys. Rev.

    (1969)
  • R.W. Hasse et al.

    Phys. Lett.

    (1986)
  • L.G. Moretto
  • I. Dostrovsky et al.

    Phys. Rev.

    (1959)
  • V.L. Lyuboshits

    Sov. J. Nucl. Phys.

    (1978)
    V.L. Lyuboshits

    Sov. J. Nucl. Phys.

    (1983)
  • V.S. Barashenkov et al.

    USP. (Sov. Phys.)

    (1973)
    A.S. Iljinov et al.

    Nucl. Phys.

    (1976)
    A.S. Iljinov et al.

    Nucl. Phys.

    (1982)
    A.S. Iljinov et al.

    Phys. Rev.

    (1989)
  • A.V. Ignatyuk

    The statistical properties of the excited atomic nuclei

    (1983)
  • S. Bjørnholm et al.
  • A. Gilbert et al.

    Can. J. Phys.

    (1965)
    P.J. Brancazio et al.

    Can. J. Phys.

    (1967)
  • T.D. Newton

    Can. J. Phys.

    (1956)
  • W. Dilg et al.

    Nucl. Phys.

    (1973)
  • T. von Egidy et al.

    Nucl. Phys.

    (1988)
  • P. Decowski et al.

    Nucl. Phys.

    (1968)
  • A.V. Ignatyuk et al.

    Yad. Fiz.

    (1968)
  • J. Töke et al.

    Nucl. Phys.

    (1981)
  • M. Hagelund et al.

    Phys. Scr.

    (1977)
  • A.H. Wapstra et al.

    Nucl. Phys.

    (1985)
  • S.F. Mughabghab et al.S.F. Mughabghab
  • G. Rohr et al.
  • A.V. Malyshev

    Level density and structure of atomic nuclei

    (1969)
  • J.E. Lynn

    The theory of neutron resonance reactions

    (1968)
  • H. Baba

    Nucl. Phys.

    (1970)
  • S.F. Mughabghab et al.

    Neutron cross sections

    BNL-325

    (1973)
  • D. Kopsch et al.

    Statistical properties of nuclei

  • Cited by (322)

    • Fission as a relevant probe of the nuclear level density away from β-stability

      2023, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    • Cross-sections for production of In115m by quasi-monoenergetic neutrons within 7-20 MeV

      2022, Radiation Physics and Chemistry
      Citation Excerpt :

      The exciton model or the hybrid Monte Carlo simulation approach using different optical model parameters is used to account for the pre-equilibrium contribution. The various level densities (LD 0–4), which can be used in EMPIRE-3.2.3 accounts for 0) Enhanced generalised superfluid model (D'Arrigo et al., 1994); 1) Generalised superfluid model (Ignatyuk et al., 1979, 1993); 2) Gilbert-Cameron level densities (Iljinov et al., 1992); 3) RIPL-3 microscopic HFB level densities. Each LD model has been utilized and evaluated in order to provide a more accurate representation of the measured results.

    • Level density of odd-A nuclei at saddle point

      2023, Nuclear Science and Techniques
    View all citing articles on Scopus
    1

    Permanent address: INFN - Sezione Sanitá, Viale Regina Elena 299, 00100 Rome, Italy.

    View full text