Enhanced Core Polarization in 70Ni and 74Zn
SORLIN, O.
Institut de Physique Nucléaire d'Orsay [IPNO]
Grand Accélérateur National d'Ions Lourds [GANIL]
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Institut de Physique Nucléaire d'Orsay [IPNO]
Grand Accélérateur National d'Ions Lourds [GANIL]
SORLIN, O.
Institut de Physique Nucléaire d'Orsay [IPNO]
Grand Accélérateur National d'Ions Lourds [GANIL]
Institut de Physique Nucléaire d'Orsay [IPNO]
Grand Accélérateur National d'Ions Lourds [GANIL]
MATEA, I.
Grand Accélérateur National d'Ions Lourds [GANIL]
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
< Leer menos
Grand Accélérateur National d'Ions Lourds [GANIL]
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
Idioma
en
Article de revue
Este ítem está publicado en
Physical Review Letters. 2006, vol. 96, p. 232501
American Physical Society
Resumen en inglés
The reduced transition probabilities B(E2;0+\rightarrow 2+_1) of the neutron-rich 74Zn and 70Ni nuclei have been measured by Coulomb excitation in a 208Pb target at intermediate energy. These nuclei have been produced at ...Leer más >
The reduced transition probabilities B(E2;0+\rightarrow 2+_1) of the neutron-rich 74Zn and 70Ni nuclei have been measured by Coulomb excitation in a 208Pb target at intermediate energy. These nuclei have been produced at Grand Accélérateur National d'Ions Lourds via interactions of a 60A MeV 76Ge beam with a Be target. The B(E2) value for 70Ni_42 is unexpectedly large, which indicates that neutrons added above N=40 strongly polarize the Z=28 proton core. In the Zn isotopic chain, the steep rise of B(E2) values beyond N=40 continues up to 74Zn 44. The enhanced proton core polarization in 70Ni is attributed to the monopole interaction between the neutron in the g_9/2 and protons in the f_7/2 and f_5/2 spin-orbit partner orbitals. This interaction could result in a weakening of magicity in 78Ni_50.< Leer menos
Palabras clave en inglés
Coulomb excitation by heavy ions
Forces in hadronic systems and nuclear effective interactions
Nuclear multipole matrix elements
Properties of nuclei with 59 <= A <= 89
Orígen
Importado de HalCentros de investigación