Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-01-30
Physics
Nuclear Physics
Nuclear Theory
Scientific paper
The coupling of single-particle motion and of vibrations in $^{11}_4$Be produces dressed neutrons which spend only a fraction of the time in pure single-particle states, and which weighting differently from the bare neutrons, lead to parity inversion. The interaction of the two least bound neutrons in the ground state of $^{12}_4$Be mediated by the $v_{14}$ Argonne nucleon-nucleon potential and by the exchange of the phonon cloud, give rise to a strongly correlated state, where the neutrons spend more than half of the time in (s$^2$+d$^2$)-configurations, resulting in a breaking of the N=8 shell closure.
Barranco Francisco
Broglia Ricardo A.
Gori Giacomo
Vigezzi Enrico
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