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Isospin coupling in time-dependent-mean-field theories and decay of isovector excitations

Abstract : We show that isospin non-diagonal terms should appear in the mean field Hamiltonian when neutron-proton symmetry is broken. They give rise to charge mixing in the single-particle wave-functions. We study the Time Dependent Hartree-Fock response of a charge-exchange excitation which generates a charge mixing in Ca isotopes. We find an enhancement of the low energy proton emission in neutron-rich isotopes interpreted in terms of a charge oscillation below the barrier.
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http://hal.in2p3.fr/in2p3-00025206
Contributor : Michel Lion <>
Submitted on : Tuesday, April 13, 2021 - 2:53:29 PM
Last modification on : Wednesday, April 14, 2021 - 3:12:01 AM
Long-term archiving on: : Wednesday, July 14, 2021 - 6:41:04 PM

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C. Simenel, P. Chomaz, T. Duguet. Isospin coupling in time-dependent-mean-field theories and decay of isovector excitations. 2005. ⟨in2p3-00025206⟩

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