Elsevier

Nuclear Physics A

Volume 145, Issue 1, 20 April 1970, Pages 223-243
Nuclear Physics A

Precise atomic mass differences and mass systematics in the region of 90 neutrons

https://doi.org/10.1016/0375-9474(70)90316-7Get rights and content

Abstract

A large double-focussing mass spectrometer has been used to determine twenty atomic mass differences involving isotopes of Pr, Nd, Sm, Eu and Gd. The new mass differences have been combined with existing reaction and decay data to calculate nucleon separation and pairing energies for many nuclei in the region of 90 neutrons. These nucleon separation and pairing energies have been used to study the irregularities in mass systematics which result from the establishment of nuclear deformation. The discontinuities in the mass systematics near N = 90 follow closely the changes observed in studies of nuclear excited state systematics, quadrupole moments and optical isotope shifts.

References (49)

  • W. McLatchie et al.

    Phys. Lett.

    (1964)
  • R.K. Sheline et al.

    Phys. Lett.

    (1965)
  • J.H. Mattauch et al.

    Nucl. Phys.

    (1965)
  • S. Hinds et al.

    Phys. Lett.

    (1965)
  • J.H.E. Mattauch et al.

    Nucl. Phys.

    (1965)
  • H. Beekhuis et al.

    Nucl. Phys.

    (1966)
  • A. Siivola et al.

    Nucl. Phys.

    (1965)
  • I. Ogawa et al.

    Nucl. Phys.

    (1965)
  • S.C. Gupta

    Nucl. Phys.

    (1965)
  • B. Elbek et al.

    Nucl. Phys.

    (1960)
  • R.C. Barber et al.

    Phys. Rev. Lett.

    (1962)
  • R.C. Barber et al.

    Can. J. Phys.

    (1962)
  • R.C. Barber et al.

    Can. J. Phys.

    (1963)
  • R.C. Barber et al.

    Can. J. Phys.

    (1963)
  • R.C. Barber et al.

    Can. J. Phys.

    (1964)
  • R.C. Barber et al.

    Phys. Rev. Lett.

    (1964)
  • R.L. Bishop et al.

    Can. J. Phys.

    (1963)
  • W. McLatchie et al.

    Can. J. Phys.

    (1964)
  • J.D. Macdougall et al.

    Z. Naturforschung

    (1966)
  • B.G. Hogg et al.

    Phys. Rev.

    (1953)
  • B.G. Hogg et al.

    Can. J. Phys.

    (1954)
  • W.H. Johnson et al.

    Phys. Rev.

    (1957)
  • R.A. Demirkhanov et al.

    J. Nucl. Phys.

    (1965)
  • R.C. Barber et al.

    Proc. of the Second Int. Conf. on nuclidic masses

  • Cited by (0)

    ‡‡

    Research supported by the United States Air Force Office of Scientific Research and by the National Research Council, Canada.

    Present address: Sprague Electric Company, North Adams, Massachusetts, USA.

    ††

    Present address: Department of Physics, Queen's University Kingston, Canada.

    †††

    Present address: Research School of Physical Sciences, Australian National University, Canberra, Australia.

    Present address: Department of Physics, University of Manitoba, Winnipeg, Canada.

    View full text