Identification of a new low-lying state in the proton drip line nucleus<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>19</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Na</mml:mi></mml:math>

Angulo, C.; Tăbăcaru, G.; Couder, M.; Gaelens, M.; Leleux, P.; Ninane, A.; Vanderbist, F.; Davinson, T.; Woods, P. J.; Schweitzer, J.S.; Achouri, N. L.; Angélique, J. C.; Berthoumieux, E.; Santos, F. de Oliveira; Himpe, P.; Descouvemont, Pierre

doi:10.1103/physrevc.67.014308

Cited by 42 publications

(49 citation statements)

References 11 publications

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“…In 18 Ne we find good agreement for the first excited 2 + and 4 + states. The ground state and first two excited states in 19 Na have been measured with tentative spin and parity assignments [25,26]. The ordering of the first two states in our calculation disagrees with the tentative assignments, but the spacing between them is only 0.1 MeV.…”

contrasting

confidence: 65%

Three-Body Forces and Proton-Rich Nuclei

2013

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We present the first study of three-nucleon (3N) forces for proton-rich nuclei along the N=8 and N=20 isotones. Our results for the ground-state energies and proton separation energies are in very good agreement with experiment where available, and with the empirical isobaric multiplet mass equation. We predict the spectra for all N=8 and N=20 isotones to the proton dripline, which agree well with experiment for 18Ne, 19Na, 20Mg and 42Ti. In all other cases, we provide first predictions based on nuclear forces. Our results are also very promising for studying isospin symmetry breaking in medium-mass nuclei based on chiral effective field theory.

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confidence: 65%

Three-Body Forces and Proton-Rich Nuclei

2013

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“…The beam was found to split into two components, with the lower energy component consistent with 18 Ne at an intensity ∼ 3% of that of 18 F, thus contributing negligibly to the observed proton yield [11]. As can be seen in Figure 2, there appears to be an additional contribution to the alpha-particle locus (E lab ∼ 11 MeV).…”

Section: Figmentioning

confidence: 66%

Resonances in19Ne with relevance to the astrophysically important18F(p,
Mountford
¹
,
Murphy
²
,
Achouri
³

et al. 2012
Phys. Rev. C
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The most intense gamma-ray line observable from novae is likely to be from positron annihilation associated with the decay of 18 F. The uncertainty in the destruction rate of this nucleus through the 18 F(p,α) 15 O reaction presents a limit to interpretation of any future observed gamma-ray flux. Direct measurements of the cross section of both this reaction and the 18 F(p,p) 18 F reaction have been performed between center of mass energies of 0.5 and 1.9 MeV. Simultaneous fits to both data sets with the R-Matrix formalism reveal several resonances, with the inferred parameters of populated states in 19 Ne in general agreement with previous measurements. Of particular interest, extra strength has been observed above ECM ∼1.3 MeV in the 18 F(p,p) 18 F reaction and between 1.3-1.7 MeV in the 18 F(p,α) 15 O reaction. This is well described by a broad 1/2 + state, consistent with both a recent theoretical prediction and an inelastic scattering measurement. The astrophysical implications of a broad sub-threshold partner to this state are discussed.

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“…This is confirmed by our microscopic approach, which suggests its energy near E x = 7.9 MeV (Fortune and Sherr propose E x = 7.4 ± 0.1 MeV). Such a large Coulomb shift is typical of s waves with a large reduced width [30].…”

Section: Discussion Of Coulomb Effectsmentioning

confidence: 93%