Nuclear structure of odd-odd [sup 82]Y

• Published in: Physical review. C, Nuclear physics Nuclear physics, 1993-06, Vol.47:6
• Main Authors: Womble, P.C., Doering, J., Glasmacher, T., Holcomb, J.W., Johns, G.D., Johnson, T.D., Petters, T.J., Riley, M.A., Wood, V.A., Tabor, S.L., Semmes, P.
• Format: Article
• Language: English
• Subjects: 663110 - General & Average Properties of Nuclei & Nuclear Energy Levels- (1992-); 663450 - Heavy-Ion-Induced Reactions & Scattering- (1992-); 663540 - Nuclear Mass Ranges- A=39-58- (1992-); 663550 - Nuclear Mass Ranges- A=59-89- (1992-); BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CALCULATION METHODS; CHARGED-PARTICLE REACTIONS; COINCIDENCE METHODS; COINCIDENCE SPECTROMETRY; COLLECTIVE MODEL; COUNTING TECHNIQUES; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GAMMA SPECTROSCOPY; HADRONS; HARTREE-FOCK METHOD; HEAVY ION REACTIONS; INTERMEDIATE MASS NUCLEI; IRON 56 TARGET; ISOTOPES; LIFETIME; MATHEMATICAL MODELS; MEV RANGE; MEV RANGE 10-100; MEV RANGE 100-1000; MINUTES LIVING RADIOISOTOPES; NEUTRONS; NICKEL 58 TARGET; NUCLEAR MODELS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; ODD-ODD NUCLEI; PROTONS; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SILICON 28 REACTIONS; SPECTROSCOPY; TARGETS; YTTRIUM 82; YTTRIUM ISOTOPES
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.47.2546

Excited states in [sup 82]Y have been investigated via the [sup 58]Ni([sup 28]Si,3[ital pn])[sup 82]Y and [sup 56]Fe([sup 29]Si,[ital p]2[ital n])[sup 82]Y reactions using beams provided by the Florida State University Tandem-LINAC with energies of 95 to 135 MeV. Particle-[gamma] coincidences with a full-sphere charged-particle detector and an excitation curve were used to assign [gamma] rays to [sup 82]Y. The [sup 56]Fe([sup 29]Si,[ital p]2[ital n])[sup 82]Y reaction at 95 MeV was used to measure [gamma]-[gamma] coincidences with five Compton-suppressed Ge detectors. Lifetimes in the ns and ps ranges were measured using direct timing and the Doppler-shift attenuation method. A level scheme with 39 states was constructed up to tentative spins and parities of (15[sup [minus]]) and (21[sup +]). In the positive-parity yrast band a phase reversal was observed in the signature splitting at [ital I]=10[h bar]. The [ital B]([ital M]1) strengths in this band alternate with signature between about 0.1 and 1.0 [mu][sub [ital N]][sup 2]. The [ital B]([ital E]2) strengths of about 90 Weisskopf units are in good agreement with those predicted by Hartree-Fock-Bogolyubov calculations. Particle-rotor calculations indicate a prolate or triaxial core shape for the positive-parity band.