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Identification of a dipole band above the Iπ=31/2- isomeric state in Pb 189

Hodge, D. (author)
Cullen, D. M. (author)
Taylor, M. J. (author)
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Procter, M. G. (author)
Nieminen, P. (author)
Grahn, T. (author)
Greenlees, P. T. (author)
Hauschild, K. (author)
Herzan, A. (author)
Jakobsson, Ulrika (author)
KTH,Kärnfysik,University of Jyväskylä, Department of Physics, P.O. Box 35, Jyvaskyla, Finland
Jones, P. (author)
Julin, R. (author)
Juutinen, S. (author)
Ketelhut, S. (author)
Leino, M. (author)
Lopez-Martens, A. (author)
Partanen, J. (author)
Peura, P. (author)
Rahkila, P. (author)
Rinta-Antila, S. (author)
Ruotsalainen, P. (author)
Sandzelius, M. (author)
Sarén, J. (author)
Scholey, C. (author)
Sorri, J. (author)
Stolze, S. (author)
Uusitalo, J. (author)
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 (creator_code:org_t)
American Physical Society, 2015
2015
English.
In: Physical Review C. Nuclear Physics. - : American Physical Society. - 0556-2813 .- 1089-490X. ; 92:5
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • A dipole band of six transitions built upon a firmly established Iπ=31/2- isomeric state has been identified in Pb189 using recoil-isomer tagging. This is the lightest odd-mass Pb nucleus in which a dipole band is known. The dipole nature of the new transitions has been confirmed through angular-intensity arguments. The evolution of the excitation energy and the aligned-angular momentum of the states in the new dipole band are compared with those of dipole bands in heavier, odd-mass lead isotopes. This comparison suggests that the new band in Pb189 is based upon a π[s1/2-2h9/2i13/2]11- - ν[i13/2+-1]13/2+ configuration. However, the increased aligned-angular momentum in Pb189 may suggest evidence for a reduced repulsive proton/neutron-hole interaction compared to dipole bands in the heavier mass isotopes.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

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