Beyond the neutron-drip line: two-neutron decay of unbound nuclei

Abstract

We discuss a decay of unbound nuclei beyond the neutron drip-line using a three-body model with a core nucleus and two valence neutrons. We particularly discuss the role of dineutron correlation between the valence neutrons in the two-neutron emission from the ground state of ${}^{26}$O and ${}^{10}$He nuclei. Our calculations clearly indicate that the emission of the two neutrons in the back-to-back direction is enhanced due to the dineutron correlation.

8 pages, 5 figures. A talk given at the Ito International Research Center Symposium "Perspectives of the Physics of Nuclear Structure", Nov. 1-4, 2017, Tokyo, Japan

References in corpus (9)

• Geometry of Borromean Halo Nuclei
• Strong dineutron correlation in 8He and 18C
• Continuum effects in neutron-drip-line oxygen isotopes
• Structure and decays of nuclear three-body systems: the Gamow coupled-channel method in Jacobi coordinates
• Dipole excitation and geometry of borromean nuclei
• New insight into the low-energy ${}^9$He spectrum
• Decay dynamics of the unbound ${}^{25}$O and ${}^{26}$O nuclei
• Three-body correlations in the ground-state decay of 26O
• Three-body model calculation of the 2${}^{+}$ state in ${}^{26}$O