Neutron excitations and interactions above the N=80 superdeformed closed shell: Superdeformation in {sup 144}Eu

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.1101· OSTI ID:512750

Hackman, G; Mullins, S M; Haslip, D; Flibotte, S; Kuehner, J A; Waddington, J C ^[1]; Clark, R M ^[2]; Pilotte, S ^[3]

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1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 (CANADA)
2. Lawrence-Berkeley National Laboratory, 1, Cyclotron Road, Berkeley, California 94550 (United States)
3. Department of Physics, University of Ottawa, Ottawa, Ontario, K1N 6N5 (CANADA)

Three superdeformed bands have been observed in the nucleus {sup 144}Eu with the GAMMASPHERE spectrometer in its early implementation phase. The reaction used was {sup 122}Sn({sup 27}Al,5n){sup 144}Eu at a beam energy of 142 MeV. All three bands are identified as single-neutron excitations with respect to {sup 143}Eu. One band is a confirmation of a previously suggested candidate. It is assigned as the yrast sequence based on the {pi}6{sup 1}{nu}7{sup 1} configuration, and is believed to undergo an interaction with the {nu}[514]9/2{sup {minus}} orbital. The other two bands are assigned as signature partners based on the {pi}6{sup 1}{nu}{tilde 6}{sup 1} configuration, where {tilde 6} corresponds to a mixed [651]1/2{sup +}/ [642]5/2{sup +} state. The partner that contains the {alpha}={minus}1/2 signature component of the {tilde 6} orbital is identified from a band crossing that occurs in related bands in {sup 145}Gd and {sup 146}Gd. Alignment plots suggest that the interaction strength becomes stronger as the mass number increases. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 512750
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALIGNMENT
ALUMINIUM 27 REACTIONS
DEFORMED NUCLEI
EUROPIUM 144
EXCITATION
GAMMA SPECTRA
NEUTRONS
NUCLEAR FORCES
POLARIZATION
SHELL MODELS
SPECTROMETERS
SUPERDEFORMED NUCLEI
TIN 122 TARGET
YRAST STATES