: An-wave two-neutron halo nucleus
- 12 September 2006
- journal article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 74 (3)
- https://doi.org/10.1103/physrevc.74.034311
Abstract
A dripline nucleus $^{22}$C is studied in a Borromean three-body model of $^{20}$C+$n$+$n$. The valence neutrons, interacting via a realistic potential, are constrained to be orthogonal to the occupied orbits in $^{20}$C. We obtain ample results supporting that $^{22}$C is an ideal $S$-wave two-neutron halo nucleus: The ground state is bound by 390-570 keV, the root mean square neutron and proton radii are 4.0 and 2.4 fm, and the two neutrons are predominantly in $(s_{1/2})^2$ orbits. The binding mechanism of $^{22}$C is discussed. One- and two-body density distributions elucidate the halo character as well as the correlated motion of the neutrons. The reaction cross sections of $^{22}$C+$^{12}$C collisions are predicted.Comment: 8 pages, 4 figure
Other Versions
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