Elsevier

Nuclear Physics A

Volume 514, Issue 2, 30 July 1990, Pages 173-224
Nuclear Physics A

A study of the low-energy level structure of 165Dy

https://doi.org/10.1016/0375-9474(90)90067-VGet rights and content

Abstract

Thermal and average resonance neutron capture studies on targets of enriched 164Dy2O3 have been performed. The secondary gamma-ray spectra after thermal neutron capture were studied with bent-crystal diffraction spectrometers while the primary gamma-rays were measured with pair spectrometers. As a result, a detailed level scheme for 164Dy comprising 50 levels below 1.5 MeV has been established. The level scheme construction was based on the Ritz combination principle using the very precise secondary gamma-ray energies. The neutron separation energy was found to be 5715.76 (30) keV. Up to about 1.4 MeV, the level scheme is believed to be essentially complete in I = 12 and 32 levels of both parities. In this energy range, the levels have been grouped into 14 rotational bands. The intrinsic structure of these bands is interpreted on the basis of the present (n, γ) results in combination with previously published (d, p) data. It is shown that as a consequence of the quasiparticle-phonon interaction most low-lying levels have a strongly mixed intrinsic structure wih both a one-quasiparticle and a collective vibrational character. Between 500 keV and 1300 keV, as much as six rotational bands with a predominantly vibrational structure have been observed.

References (47)

  • L.K. Peker

    Nucl. Data Sheets

    (1987)
  • R.G. Helmer

    Nucl. Data Sheets

    (1985)
  • J.M. Dairiki et al.

    Nucl. Data Sheets

    (1980)
  • E.N. Shurshikov

    Nucl. Data Sheets

    (1986)
  • A.E. Ignatochkin et al.

    Nucl. Data Sheets

    (1987)
  • H.R. Koch et al.

    Nucl. Instr. Meth.

    (1980)
  • G. Mauron

    Nucl. Phys.

    (1972)
  • E. Kaerts et al.

    Nucl. Instr. Meth.

    (1987)
  • E. Kaerts et al.

    Nucl. Instr. Meth.

    (1988)
  • B. Harmatz

    Nucl. Data Sheets

    (1976)
  • R.C. Greenwood et al.

    Nucl. Instr. Meth.

    (1976)
  • I.L. Lamm

    Nucl. Phys.

    (1969)
  • B. Nilsson

    Nucl. Phys.

    (1969)
  • W. Michaelis et al.

    Nucl. Phys.

    (1968)
  • W. Michaelis et al.

    Nucl. Phys.

    (1970)
  • O.W.B. Schult et al.

    Z. Phys.

    (1964)
  • E. Kaerts et al.
  • O.W.B. Schult et al.

    Z. Phys.

    (1964)
  • G. Markus et al.

    Z. Phys.

    (1967)
  • M.A. Islam et al.

    Phys. Rev.

    (1983)
  • R.K. Sheline et al.

    Phys. Rev.

    (1964)
  • T. Grotdal et al.

    Mat. Phys. Medd. Dan. Vid. Selsk.

    (1970)
  • V.A. Bondarenko et al.

    Bul. Acad. Sc. USSR (Phys. Ser.)

    (1965)
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    Centre de Recherche du Cyclotron-UCL, Chemin du Cyclotron 2, 1348 Louvain-la-Neuve, Belgium.

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    BP, Nuclear Geophysics Section Research Centre, Sunbury on Thames, UK.

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    Physikalisches Institut Auf der Morgenstelle, D-7400 Tübingen, Fed. Rep. Germany.

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