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Gamma-ray spectroscopy in 110Sn and 111Sn

  • M. Wolińska-Cichocka
  • J. KownackiEmail author
  • W. Urban
  • E. Ruchowska
  • W. A. Płóciennik
  • B. Bekman
  • Ch. Droste
  • W. Gast
  • R. Lieder
  • W. Meczyński
  • M. Kisieliński
  • A. Kordyasz
  • M. Kowalczyk
  • P. Kowina
  • J. Iwanicki
  • T. Morek
  • J. Perkowski
  • J. Srebrny
  • A. Stolarz
  • J. Styczeń
Original Article

Abstract.

Excited states in 110Sn and 111Sn nuclei have been investigated using in-beam γ-ray spectroscopic methods. An 16O beam with an energy of 60-80MeV was used to bombard a 98Mo target. On the basis of the relative excitation functions, γ-ray angular distributions, γ-γ and γ-time distributions, γ-ray multiplicity and total energy data, the level schemes of 110Sn and 111Sn have been studied and extended up to Eexc ∼ 11.5MeV, I = 24ℏ, and Eexc ∼ 11.1MeV and I = (51/2)ℏ, respectively. An extension of the intruder, g.s. and negative-parity bands, as well as 5 new band-like structures are proposed in 110Sn. The nature of newly introduced collective band 8 as well as 10+ states fed in the decay of the collective band is discussed. In the 111Sn nucleus an intruder band based on the 23/2- state has been reinvestigated and the extension of the g.s. band and second negative-parity band is given. Evidence for neutron-core coupling in 111Sn is found. The structure and systematics of excited states in light Sn isotopes is discussed.

PACS.

27.60.+j 90 ⩽ A ⩽ 149 23.20.Lv γ transitions and level energies 21.60.Cs Shell model 21.10.Re Collective levels 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • M. Wolińska-Cichocka
    • 1
    • 2
  • J. Kownacki
    • 1
    Email author
  • W. Urban
    • 2
  • E. Ruchowska
    • 3
  • W. A. Płóciennik
    • 3
  • B. Bekman
    • 4
  • Ch. Droste
    • 2
  • W. Gast
    • 5
  • R. Lieder
    • 5
  • W. Meczyński
    • 6
  • M. Kisieliński
    • 1
    • 3
  • A. Kordyasz
    • 1
  • M. Kowalczyk
    • 1
    • 2
  • P. Kowina
    • 4
  • J. Iwanicki
    • 1
  • T. Morek
    • 2
  • J. Perkowski
    • 7
  • J. Srebrny
    • 2
  • A. Stolarz
    • 1
  • J. Styczeń
    • 6
  1. 1.Heavy Ion LaboratoryWarsaw UniversityWarszawaPoland
  2. 2.Faculty of PhysicsWarsaw UniversityWarszawaPoland
  3. 3.The Andrzej Sołtan Institute for Nuclear StudiesŚwierkPoland
  4. 4.Department of PhysicsSilesia UniversityKatowicePoland
  5. 5.Institut für KernphysikForschungszentrumJülichGermany
  6. 6.The H. Niewodniczański Institute of Nuclear PhysicsKrakówPoland
  7. 7.Department of PhysicsUniversity of ŁódźŁódźPoland

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