Excited states built on the 6[sup [minus]] isomer in [sub 37][sup 86]Rb[sub 49]

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.2427· OSTI ID:5073598

Winter, G; Schwengner, R; Reif, J; Prade, H ^[1]; Doering, J ^[2]; Wirowski, R; Nicolay, N; von Brentano, P ^[3]; Grawe, H; Schubart, R ^[4]

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1. Institut fuer Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden (Germany)
2. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
3. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany)
4. Hahn-Meitner-Institut Berlin, D-14109 Berlin (Germany)

High-spin states of the doubly-odd nucleus[sup 86]Rb containing 37 protons and 49 neutrons have been investigated via the reaction [sup 82]Se([sup 7]Li,3[ital n]) using [sup 7]Li ions with energies between 30 and 35 MeV. The new level scheme is based on prompt [gamma][gamma] coincidences, angular distributions and directional correlation orientation ratios of [gamma] rays as well as on linear polarizations of some strong [gamma] rays and contains levels with excitation energies up to 7.9 MeV and tentative spins up to 16[h bar]. For fifteen of the levels lifetimes in the ps region have been determined by analyzing the Doppler shift of [gamma] rays. Several fast [ital M]1 transitions with [ital B]([ital M]1)[approx gt]0.3W.u. have been identified. The new high-spin level scheme of [sup 86]Rb is interpreted on the basis of shell-model calculations in the configuration space 1[ital p][sub 3/2], 0[ital f][sub 5/2], 1[ital p][sub 1/2], and 0[ital g][sub 9/2] for the protons and 1[ital p][sub 1/2], 0[ital g][sub 9/2], and 1[ital d][sub 5/2] for the neutrons. The energies of the observed levels with [ital I][gt]5 as well as most of the observed electromagnetic transition probabilities could be well described. The excitation of a 0[ital g][sub 9/2] neutron over the [ital N]=50 shell gap into the [ital d][sub 5/2] orbital is predicted to cause remarkable alterations only for states with [ital I][sup [pi]][ge]15[sup +]. Some of the reduced [ital M]1 transition probabilities calculated within the shell model are found to depend critically on the parametrization used to describe the residual interaction.

• OSTI ID: 5073598
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663220* -- Electromagnetic Transitions-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663550 -- Nuclear Mass Ranges-- A=59-89-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DATA
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FERMIONS
GAMMA SPECTROSCOPY
HADRONS
HEAVY ION REACTIONS
HIGH SPIN STATES
IN-BEAM SPECTROSCOPY
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIFETIME
LITHIUM 7 REACTIONS
M1-TRANSITIONS
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
RADIOISOTOPES
RUBIDIUM 86
RUBIDIUM ISOTOP
SELENIUM 82 TARGET
SPECTROSCOPY
TARGETS