Structure of the ground and excited states in Λ9Be nucleus

Nesterov, A.V.; Lashko, Yu A.; Vasilevsky, V.S.

doi:10.1016/j.nuclphysa.2021.122325

Structure of the ground and excited states in Λ9Be nucleus

Jun 15, 2020

42 pages

Published in:

Nucl.Phys.A 1016 (2021) 122325

Published: Dec, 2021

e-Print:

2006.08137 [nucl-th]

DOI:

10.1016/j.nuclphysa.2021.122325 (publication)

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Abstract: (Elsevier B.V.)

We investigate properties of bound and resonance states in the

_{Λ}^{9}

Be nucleus. To reveal the nature of these states, we use a three-cluster

2 α + Λ

microscopic model. The model incorporates Gaussian and oscillator basis functions and reduces a three-cluster Schrödinger equation to a two-body like many-channel problem with the two-cluster subsystems (

_{Λ}^{5}

He and ⁸Be) being in a bound or a pseudo-bound state. Influence of the cluster polarization on the energy and widths of resonance states in

_{Λ}^{9}

Be and on elastic and inelastic

_{Λ}^{5}

He +α scattering is analyzed.

Note:

42 pages, 5 figures, extended version of the paper, submitted to Nucl. Phys. A

Cluster model
Resonating group method
Hypernucleus
Three-cluster microscopic model
Cluster polarization
Resonance states
resonance: width
nucleus
Schroedinger equation
excited state

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