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

18 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.

Funders	Funder number
U.S. Department of Energy
Office of Science	de-sc0009971
National Natural Science Foundation of China	11435014, 11835001, 11921006, 11975282
Chinese Academy of Sciences	XDB34000000
China Postdoctoral Science Foundation	BX20200136
National Key Research and Development Program of China	2018YFA0404401
State Key Laboratory of Nuclear Physics and Technology, Peking University	NPT2020ZZ01

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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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

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KW - Three-nucleon force

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