Continuum and three-nucleon force in Borromean system: The 17Ne case

Y. Z. Ma; F. R. Xu; N. Michel; S. Zhang; J. G. Li; B. S. Hu; L. Coraggio; N. Itaco; A. Gargano

doi:10.1016/j.physletb.2020.135673

Continuum and three-nucleon force in Borromean system: The ¹⁷Ne case

Y. Z. Ma, F. R. Xu, N. Michel, S. Zhang, J. G. Li, B. S. Hu, L. Coraggio, N. Itaco, A. Gargano

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Starting from chiral two-nucleon (2NF) and chiral three-nucleon (3NF) potentials, we present a detailed study of ¹⁷Ne, a Borromean system, with the Gamow shell model which can capture continuum effects. More precisely, we take advantage of the normal-ordering approach to include the 3NF and the Berggren representation to treat bound, resonant and continuum states on equal footing in a complex-momentum plane. In our framework, 3NF is essential to reproduce the Borromean structure of ¹⁷Ne, while the continuum is more crucial for the halo property of the nucleus. The two-proton halo structure is demonstrated by calculating the valence proton density and correlation density. The astrophysically interesting 3/2⁻ excited state has its energy above the threshold of the proton emission, and therefore the two-proton decay should be expected from the state.

Original language	English
Article number	135673
Journal	Physics Letters B
Volume	808
DOIs	https://doi.org/10.1016/j.physletb.2020.135673
State	Published - Sep 10 2020
Externally published	Yes

Funding

This work has been supported by the National Key Research and Development Program of China under Grant No. 2018YFA0404401 ; the National Natural Science Foundation of China under Grants No. 11835001 , No. 11921006 , No. 11975282 and No. 11435014 ; China Postdoctoral Science Foundation under Grant No. BX20200136 ; the State Key Laboratory of Nuclear Physics and Technology, Peking University under Grant No. NPT2020ZZ01 ; the Strategic Priority Research Program of Chinese Academy of Sciences , Grant No. XDB34000000 ; and the CUSTIPEN (China-U.S. Theory Institute for Physics with Exotic Nuclei) funded by The U.S. Department of Energy , Office of Science under Grant No. de-sc0009971 . We acknowledge the High-Performance Computing Platform of Peking University for providing computational resources.

Keywords

Borromean system
Continuum
Gamow shell model
Halo structure
Three-nucleon force

Access to Document

10.1016/j.physletb.2020.135673

Cite this

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title = "Continuum and three-nucleon force in Borromean system: The 17Ne case",

abstract = "Starting from chiral two-nucleon (2NF) and chiral three-nucleon (3NF) potentials, we present a detailed study of 17Ne, a Borromean system, with the Gamow shell model which can capture continuum effects. More precisely, we take advantage of the normal-ordering approach to include the 3NF and the Berggren representation to treat bound, resonant and continuum states on equal footing in a complex-momentum plane. In our framework, 3NF is essential to reproduce the Borromean structure of 17Ne, while the continuum is more crucial for the halo property of the nucleus. The two-proton halo structure is demonstrated by calculating the valence proton density and correlation density. The astrophysically interesting 3/2− excited state has its energy above the threshold of the proton emission, and therefore the two-proton decay should be expected from the state.",

keywords = "Borromean system, Continuum, Gamow shell model, Halo structure, Three-nucleon force",

author = "Ma, {Y. Z.} and Xu, {F. R.} and N. Michel and S. Zhang and Li, {J. G.} and Hu, {B. S.} and L. Coraggio and N. Itaco and A. Gargano",

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year = "2020",

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doi = "10.1016/j.physletb.2020.135673",

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TY - JOUR

T1 - Continuum and three-nucleon force in Borromean system

T2 - The 17Ne case

AU - Ma, Y. Z.

AU - Xu, F. R.

AU - Michel, N.

AU - Zhang, S.

AU - Li, J. G.

AU - Hu, B. S.

AU - Coraggio, L.

AU - Itaco, N.

AU - Gargano, A.

PY - 2020/9/10

Y1 - 2020/9/10

N2 - Starting from chiral two-nucleon (2NF) and chiral three-nucleon (3NF) potentials, we present a detailed study of 17Ne, a Borromean system, with the Gamow shell model which can capture continuum effects. More precisely, we take advantage of the normal-ordering approach to include the 3NF and the Berggren representation to treat bound, resonant and continuum states on equal footing in a complex-momentum plane. In our framework, 3NF is essential to reproduce the Borromean structure of 17Ne, while the continuum is more crucial for the halo property of the nucleus. The two-proton halo structure is demonstrated by calculating the valence proton density and correlation density. The astrophysically interesting 3/2− excited state has its energy above the threshold of the proton emission, and therefore the two-proton decay should be expected from the state.

AB - Starting from chiral two-nucleon (2NF) and chiral three-nucleon (3NF) potentials, we present a detailed study of 17Ne, a Borromean system, with the Gamow shell model which can capture continuum effects. More precisely, we take advantage of the normal-ordering approach to include the 3NF and the Berggren representation to treat bound, resonant and continuum states on equal footing in a complex-momentum plane. In our framework, 3NF is essential to reproduce the Borromean structure of 17Ne, while the continuum is more crucial for the halo property of the nucleus. The two-proton halo structure is demonstrated by calculating the valence proton density and correlation density. The astrophysically interesting 3/2− excited state has its energy above the threshold of the proton emission, and therefore the two-proton decay should be expected from the state.

KW - Borromean system

KW - Continuum

KW - Gamow shell model

KW - Halo structure

KW - Three-nucleon force

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