New neutron-rich isotope

Sakuraï, H.; Lukyanov, S. M.; Notani, M.; Aoi, N.; Beaumel, D.; Fukuda, N.; Hirai, M.; Ideguchi, E.; Imai, N.; Ishihara, M.; Iwasaki, H.; Kubo, T.; Kusaka, K.; Kumagai, H.; Nakamura, Takashi; Ogawa, Hiroshi; Penionzhkevich, Yu. É.; Teranishi, Takashi; Watanabe, Yasushi; Yoneda, K.; Yoshida, Akitoshi

doi:10.1063/1.57323

Cited by 3 publications

(2 citation statements)

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“…Furthermore, 24 O is the last bound isotope with the ground-state of 25 O being particle unstable at the neutron decay energy 770 keV and with a width of 172 (30)keV [110]. This has become known as the oxygen anomaly, since by adding just one more proton pushes the neutron dripline considerably further out with 31 F being the last known bound fluorine isotope [111]. This oxygen anomaly was given a theoretical explanation in Ref.…”

Section: Unbound States In Neutron-rich Oxygen Isotopesmentioning

confidence: 99%

Emergent properties of nuclei from ab initio coupled-cluster calculations

Hagen,

Hjorth-Jensen,

Jansen

et al. 2016

Preprint

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Emergent properties such as nuclear saturation and deformation, and the effects on shell structure due to the proximity of the scattering continuum and particle decay channels are fascinating phenomena in atomic nuclei. In recent years, ab initio approaches to nuclei have taken the first steps towards tackling the computational challenge of describing these phenomena from Hamiltonians with microscopic degrees of freedom. This endeavor is now possible due to ideas from effective field theories, novel optimization strategies for nuclear interactions, ab initio methods exhibiting a soft scaling with mass number, and ever-increasing computational power. This paper reviews some of the recent accomplishments. We also present new results. The recently optimized chiral interaction NNLOsat is shown to provide an accurate description of both charge radii and binding energies in selected light-and medium-mass nuclei up to 56 Ni. We derive an efficient scheme for including continuum effects in coupledcluster computations of nuclei based on chiral nucleon-nucleon and three-nucleon forces, and present new results for unbound states in the neutron-rich isotopes of oxygen and calcium. The coupling to the continuum impacts the energies of the J π = 1/2 − , 3/2 − , 7/2 − , 3/2 + states in 17,23,25 O, and -contrary to naive shellmodel expectations -the level ordering of the J π = 3/2 + , 5/2 + , 9/2 + states in 53,55,61 Ca.

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Section: Unbound States In Neutron-rich Oxygen Isotopesmentioning

confidence: 99%

Emergent properties of nuclei from ab initio coupled-cluster calculations

Hagen,

Hjorth-Jensen,

Jansen

et al. 2016

Preprint

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show abstract

“…The large deformation of other N ∼ 20 isotopes like 31,32,34 Mg [4][5][6] and 30 Ne [7] along with the irregular ground state properties of 31,32 Na [8,9] indicates a region of N ∼ 20 isotopes of Ne, Na, and Mg with such properties, referred to as the island of inversion [10]. Even for the neutron-rich fluorine isotopes, a tendency toward deformation has been suggested by the stability of 31 F with N = 22, in contrast to the particle unstable nature of 25 O with N = 17 [11].…”

Section: Introductionmentioning

confidence: 99%

Excited intruder states inMg32

et al. 2008

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The low energy level structure of N = 20 32 Mg obtained via β-delayed γ spectroscopy is reported. The level structure of 32 Mg is found to be completely dominated by intruders. An inversion between the 1p-1h and 3p-3h states is observed for the negative parity states, similar to the 0p-0h and 2p-2h inversion for the positive parity states in these N ∼ 20 nuclei. The intruder excited states, both positive and negative parity, are reasonably explained by Monte Carlo shell model calculations, which suggest a shrinking N = 20 shell gap with decreasing Z.

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Decay of tungsten-189

Mirzadeh

Lambrecht

2002

Applied Radiation and Isotopes

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New neutron-rich isotope

Cited by 3 publications

References 0 publications

Emergent properties of nuclei from ab initio coupled-cluster calculations

Emergent properties of nuclei from ab initio coupled-cluster calculations

Excited intruder states inMg32

Decay of tungsten-189

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