Onset of collectivity in the odd-odd nucleus [sup 72]As

High-spin states in the odd-odd nucleus [sup 72]As were investigated by means of coincidence measurements via the [sup 59]Co([sup 19]F,[alpha][ital pn]) and the [sup 65]Cu([sup 12]C,[alpha][ital n]) reactions at beam energies of 55 MeV and 50 MeV, respectively. Two new rotational-like level sequence...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 1994-05, Vol.49:5
Main Authors: Doering, J., Tabor, S.L., Holcomb, J.W., Johnson, T.D., Riley, M.A., Womble, P.C.
Format: Article
Language:English
Subjects:
663220 > Electromagnetic Transitions-- (1992-)
663450 > Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663550 > Nuclear Mass Ranges-- A=59-89-- (1992-)
ASTATINE
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COBALT 59 TARGET
COLLECTIVE EXCITATIONS
COPPER 65 TARGET
E2-TRANSITIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUORINE 19 REACTIONS
HALOGENS
HEAVY ION REACTIONS
HIGH SPIN STATES
LIFETIME
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NONMETALS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
ROTATIONAL STATES
TARGETS 663110 > General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
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Summary:High-spin states in the odd-odd nucleus [sup 72]As were investigated by means of coincidence measurements via the [sup 59]Co([sup 19]F,[alpha][ital pn]) and the [sup 65]Cu([sup 12]C,[alpha][ital n]) reactions at beam energies of 55 MeV and 50 MeV, respectively. Two new rotational-like level sequences of probably opposite parities have been found to feed into the known 7[sup ([minus])] isomer at 562.8 keV. Lifetime measurements for some states of the positive-parity sequence using the Doppler shift attenuation method revealed transition strengths of [ital B]([ital E]2)[approx]40 Weisskopf units. Thus, this band is interpreted as a collective structure built on the two-quasiparticle intruder configuration ([pi][ital g][sub 9/2][direct product][nu][ital g][sub 9/2]).
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.49.2419