Search for the [ital K][sup [pi]]=1[sup +] two-proton band in [sup 166]Er

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1943· OSTI ID:6610833

Li, H; Magnus, P V; Smith, M S; Parker, P D ^[1]; Cizewski, J A; Lee, C S; Barker, D ^[2]; Wesselborg, C ^[3]; Champagne, A E ^[4]

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1. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 (United States)
2. Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States)
3. Institut fuer Kernphysik, Justus-Liebig-Universitaet, Giessen (Germany)
4. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

The [sup 165]Ho ([alpha],[ital t]) and ([sup 3]He,[ital d]) reactions have been measured at beam energies of 40 and 25 MeV to look for the [ital K][sup [pi]]=1[sup +][l brace]9/2[sup [minus]][514][minus]7/2[sup [minus]][523][r brace] two-proton band structure in [sup 166]Er. Reaction products were analyzed using a quadrupole-three-dipole spectrometer. Distorted-wave Born approximation predictions were used to extract candidate states with angular momentum transfer [ital l]=5. The measured strengths of all the candidates for [ital l]=5 transitions were compared with the Nilsson fingerprint pattern of the [ital K][sup [pi]]=1[sup +][l brace]9/2[sup [minus]][514][minus]7/2[sup [minus]][523][r brace] band to identify the structure. No strong population of this configuration was found. At best two tentative candidates for the [ital I][sup [pi]]=3[sup +] and 4[sup +] members of this band could be identified, which would represent at most 38% of the expected strength for this configuration. The bandhead for this tentative [ital K][sup [pi]]=1[sup +] excitation does not correspond to any [ital I][sup [pi]]=1[sup +] state observed in the [sup 166]Er([gamma],[gamma][prime]) reaction.

• OSTI ID: 6610833
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COLLECTIVE EXCITATIONS
DEUTERONS
DIRECT REACTIONS
DWBA
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
ERBIUM 166
ERBIUM ISOTOPES
EVEN-EVEN NUCLEI
EXCITATION
HELIUM 3 REACTIONS
HOLMIUM 165 TARGET
INTERACTING BOSON MODEL
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NILSSON-MOTTELSON MODEL
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SHELL MODELS
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
TRITONS