598 research outputs found
Three-body decay of linear-chain states in C
The decay properties of the linear-chain states in C are investigated
by using the antisymmetrized molecular dynamics. The calculation predicts two
rotational bands with linear-chain configurations having the -bond and
-bond valence neutrons. For the -bond linear-chain, the calculated
excitation energies and the widths of -decay to the ground state of
reasonably agree with the experimental candidates observed by
the resonant scattering. On the other hand, the
-bond linear-chain is the candidate of the higher-lying resonant states
reported by the break-up reaction. As the evidence of the -bond
linear-chain, we discuss its decay pattern. It is found that the -bond
linear-chain not only decays to the excited band of but also
decays to the three-body channel of , and the
branching ratio of these decays are comparable. Hence, we suggest that this
characteristic decay pattern is a strong signature of the linear-chain
formation and a key observable to distinguish two different linear-chains
Characteristic \alpha and ^{6}He decays of the linear-chains in ^{16}C
The linear-chain states of C and their decay modes are theoretically
investigated by using the antisymmetrized molecular dynamics. It is found that
the positive-parity linear-chain states have the
configuration and primary decay to the
Be() as well as to the Be(g.s.) by the particle
emission. Moreover, we show that they also decay to the channel. In the negative-parity states, it is found that two types of the
linear-chains exist. One has the valence neutrons occupying the
molecular-orbits , while the other's
configuration cannot be explained in terms of the molecular orbits because of
the strong parity mixing. Both configurations constitute the rotational bands
with large moment of inertia and intra-bands transitions. Their
and reduced widths are sufficiently large to be distinguished
from other non-cluster states although they are smaller than those of the
positive-parity linear-chain.Comment: arXiv admin note: text overlap with arXiv:1605.0556
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