Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Phys Rev Lett. 2012 Jun 15;108(24):242501. doi: 10.1103/PhysRevLett.108.242501.
We employ interactions from chiral effective field theory and compute binding energies, excited states, and radii for isotopes of oxygen with the coupled-cluster method. Our calculation includes the effects of three-nucleon forces and of the particle continuum, both of which are important for the description of neutron-rich isotopes in the vicinity of the nucleus 24O. Our main results are the placement of the neutron drip line at 24O, the assignment of spins, parities and resonance widths for several low-lying states of the drip line nucleus, and an efficient approximation that incorporates the effects of three-body interactions.
我们采用手征有效场论中的相互作用，并运用耦合簇方法计算了氧同位素的结合能、激发态和半径。我们的计算包括了三体核力和粒子连续区的影响，这些对于描述临近 24O 核的富含中子的同位素是非常重要的。我们的主要结果是将中子滴线放置在 24O，确定了滴线核的几个低能态的自旋、宇称和共振宽度，以及一个有效包含三体相互作用影响的近似。
