Elsevier

Nuclear Physics A

Volume 516, Issue 1, 17 September 1990, Pages 157-188
Nuclear Physics A

Electromagnetic properties of some odd-odd nuclei in the A≈ 100 region and IBFFM description of 106Ag

https://doi.org/10.1016/0375-9474(90)90055-QGet rights and content

Abstract

Electromagnetic properties of odd-odd transitional nuclei with A≈ 100 are investigated experimentally and theoretically. Nanosecond isomers are studied in-beam by means of delayed γγ-coincidences and the generalized centroid-shift method. The reactions 98Mo+30MeV 7Li and 92,94Mo+ 50 MeV 12C are utilized. Following half-lives are determined: T12 (547.2 keV in 102Rh) = 0.25±0.07ns, T12 (243.1 keV in 102Rh) = 0.30±0.10ns,T12(181.1 keV in 99Tc) = 3.8 ± 0.3ns, T12 (2902.0keV in 104Cd) = 0.6±0.1 ns, T12 (118.7keV in 103Pd) =0.8±0.2 ns, T12 (131.1 keV in 105Cd) = 1.5 ±0.3 ns, T12 (211.8 keV in 104Ag) = 1.4±0.1 ns, T12 (181.0 keV in 102Ag) = 3.5±0.2 ns. Additionally, several upper limits of level lifetimes are derived. The systematics of E1, M1 and E2 transition rates in 100,102,104Rh and 102,104,106Ag is presented and discussed. Fast M1 transitions within the 2qp πg̃92νh̃12 band appear to be associated with the strong coupling of the πg̃92 proton and the rotational alignment of the h̃112 neutron. Extensive IBFFM calculations of level energies and electromagnetic properties of 106Ag as a typical case demonstrate that this model could account for the complex structural pattern of this type of nuclei. NUCLEAR REACTIONS 98Mo(7Li, 3n), (7Li2nα), E=30 MeV; 92,94Mo(12C, pn), 94Mo(12C, 2n), (12C, 2pn), E = 50 MeV; measured Eγ,Iγ, γγ(t). 102Rh, 99Tc, 102,104Ag, 104Cd,

References (41)

  • R. Duffait et al.

    Nucl. Phys.

    (1986)
  • S. Brant et al.

    Phys. Lett.

    (1987)
  • W. Andrejtscheff et al.

    Nucl. Instr. Meth.

    (1982)
  • W. Andrejtscheff et al.

    Nucl. Phys.

    (1985)
  • I. Penev et al.

    Nucl. Instr. Meth.

    (1987)
  • W. Andrejtscheff et al.

    Nucl. Phys.

    (1989)
  • W. Andrejtscheff et al.

    Nucl. Phys.

    (1986)
  • P.M. Endt

    Nucl. Data Tables

    (1981)
  • A.W.B. Kalshoven et al.

    Nucl. Phys.

    (1980)
  • R.S. Hager et al.

    Nucl. Data

    (1968)
  • L. Funke et al.

    Phys. Lett.

    (1983)
  • F. Dönau

    Nucl. Phys.

    (1987)
  • H.-J. Keller et al.

    Nucl. Phys.

    (1985)
  • D. De Frenne et al.

    Nucl. Data Sheets

    (1988)
  • A. Arima et al.

    Phys. Rev. Lett.

    (1975)
  • Y. Tokunaga et al.

    Nucl. Phys.

    (1984)
  • B.S. Reehal et al.

    Phys. Rev.

    (1970)
  • V. Paar

    Nucl. Phys.

    (1973)
  • V. Paar

    Nucl. Phys.

    (1979)
  • W. Andrejtscheff et al.

    Nucl. Phys.

    (1985)
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