2013/08/02 by Hirotaka Shimoyama, Masayuki Matsuo
Physics and Astronomy · #Amplitude #Astro and Planetary Science #Atomic physics #Condensed matter physics #Formalism (music) #Magnetic monopole #Neutron #Nuclear Physics and Applications #Nuclear physics #Nuclear physics research studies #Physics #Quantum mechanics #Quasiparticle #Random phase approximation #nucl-th
paper · pdf · doi:10.1103/physrevc.88.054308
30 pages, 10 figures
arxiv created 2013/08/02 · openalex publication_date 2013/11/12 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study microscopic structures of monopole pair vibrational modes and associated two-neutron transfer amplitudes in neutron-rich Sn isotopes by means of the linear response formalism of the quasiparticle random phase approximation (QRPA). For this purpose we introduce a method to decompose the transfer amplitudes with respect to two-quasiparticle components of the QRPA eigenmode. It is found that pair-addition vibrational modes in neutron-rich 132--140Sn and the pair rotational modes in 142--150Sn are commonly characterized by coherent contribution of quasaiparticle states having high orbital angular momenta l\ensuremath\gtrsim5, which suggests transfer of a spatially correlated neutron pair. The calculation also predicts a high-lying pair vibration, the giant pair vibration, emerging near the one-neutron separation energy in 110--130Sn, and we find that they have the same di-neutron characters as that of the low-lying pair vibration in 132--140Sn.