Evolution and Destruction of Shapes in 59Cu

• An extensive high-spin level scheme has been established in 59Cu using a heavy-ion fusion evaporation reaction and the GAMMASPHERE multidetector array in conjunction with MICROBALL. Next to the spherical states at low excitation energy a large number of regular sequences of high-energy γ-ray transitions have been observed, which form rotational bands with various degree of deformation. For the yrast superdeformed band about 90% of the intensity of the discrete γ decay-out, distributed over about 30 decay paths, is known, which allows for a detailed study of this decay-out process. Two of the deformed bands were found to decay by prompt proton emission into two different spherical states of 58Ni, in direct competition with the γ decay-out process

Ämnesord

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

Nyckelord

discrete gamma decay

yrast superdeformed band

nuclear deformation

rotational bands

high energy gamma ray transitions

low excitation energy

spherical states

heavy-ion fusion evaporation reaction

high spin level scheme

59Cu

shell effect

nuclear spin

kinematic moments-of inertia

parity

level density

B2 band

40Ca(28Si

B1 band

deformed band

prompt proton emission decay

58Ni

gamma decay-out process

shape destruction

shape evolution

X)59Cu

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