Energy levels of light nuclei

Tilley, D. R.; Kelley, J. H.; Godwin, J. L.; Millener, D.J.; Purcell, J.E.; Sheu, C.G.; Weller, H. R.

doi:10.1016/j.nuclphysa.2004.09.059

Cited by 828 publications

(1,293 citation statements)

References 1,092 publications

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“…(Our failure to observe neutron decay is probably due to a combination of two factors: a reduced detection efficiency owing to the high multiplicity of the n + p + 3α final state and the presence of many competing channels, some involving very broad intermediate states.) The results are generally consistent with the TUNL evaluation [16] and are summarized in Table I. The main new result is the observation of the α decay of a state at 11.48 MeV.…”

Section: A General Remarkssupporting

confidence: 83%

“…Finally, α decay can lead to n + p + 3α and d + 3α if the decay proceeds to unbound states in 6 Li, but it can also lead to the three-body final state 2α + 6 Li if the decay proceeds to the ground state in 6 Li or to an excited state with a significant γ branch, which, according to Ref. [16], is the case only for the 3.56-MeV state.…”

Section: A General Remarksmentioning

confidence: 99%

“…Peaks seen in the various decay spectra. Each peak is identified with one or several known [16] states in 10 B.…”

Section: Excitation Spectramentioning

confidence: 99%

“…Present study TUNL [16] Decay 11.52 ± 35 500 ± 100 (γ ), α a The γ -decay spectrum was recalibrated using the evaluated energies in the third column. b The width is presumably ≈ 220 keV and decay modes of d and α are likely [16].…”

Section: Excitation Spectramentioning

confidence: 99%

“…b The width is presumably ≈ 220 keV and decay modes of d and α are likely [16]. c The energies fit poorly; the identification is mainly based on the observed decay to 6 Li(3 + ).…”

Section: Excitation Spectramentioning

confidence: 99%

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Observation ofαdecay from a state in10B at 11.48 MeV

et al. 2012

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We report on the observation of α decay from a state in 10 B at 11.48 MeV. The only observed decay branch is to the first T = 1 state in 6 Li at 3.56 MeV. The apparent absence of an α-decay branch to the (T = 0) ground state in 6 Li suggests that the 11.48-MeV state should be assigned isospin T = 1. The spin and parity of the 11.48-MeV state could not be directly determined from the present study apart from J = 0 being ruled out by the observed angular correlation. We conjecture that the 11.48-MeV state is the analog of the 10.15-MeV, (4 + ) state in 10 Be, constitutes the third member of a rotational band built on the 0 + state at 7.65 MeV, and has pronounced molecular structure.

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Section: A General Remarkssupporting

confidence: 83%

Section: A General Remarksmentioning

confidence: 99%

“…Peaks seen in the various decay spectra. Each peak is identified with one or several known [16] states in 10 B.…”

Section: Excitation Spectramentioning

confidence: 99%

Section: Excitation Spectramentioning

confidence: 99%

“…b The width is presumably ≈ 220 keV and decay modes of d and α are likely [16]. c The energies fit poorly; the identification is mainly based on the observed decay to 6 Li(3 + ).…”

Section: Excitation Spectramentioning

confidence: 99%

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Observation ofαdecay from a state in10B at 11.48 MeV

et al. 2012

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The ⁷Li (n,γ)⁸Li radiative capture at astrophysical energies

Dubovichenko

Dzhazairov-Kakhramanov

2012

Annalen der Physik

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Abstract. The versions of intercluster interaction potentials describing the resonance nature of some phase shifts of the n 7 Li elastic scattering at low energies and the P 2 ground state of 8 Li in the n 7 Li cluster channel have been constructed. The possibility of describing the total cross sections of 7 Li(n, ) 8 Li within the energies from 5 meV (510 -3 eV) to 1 MeV, including resonance at 0.25 MeV, has been demonstrated for the potentials obtained in the potential cluster model with forbidden states.

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Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

2021

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The nuclear matter and charge radii of the helium isotopes (A=4,6,8) are calculated by quantitative geometrical thermodynamics (QGT) taking as input the symmetry of the alpha-particle, the very weak binding (and hence halo nature) of the heavier helium isotopes, and a characteristic length scale given by the proton size. The results follow by considering each isotope in its ground state, with QGT representing each system as a maximum entropy configuration that conforms to the Holographic Principle. This allows key geometric parameters to be determined from the number of degrees of freedom available. QGT treats 6 He as a 4 He core plus a concentric neutron shell comprising a holomorphic pair of neutrons, and the 8 He neutron halo is treated as a holomorphic pair of holomorphic pairs. Considering that the information content of each system allows a correlation angle of 2𝝅/3 between the holomorphic entities to be inferred, then the charge radii of the three isotopes can be calculated from the displacement of the 4 He core from the center of mass. The calculations for the charge and matter radii of 4,6,8 He agree closely with observed values. Similar QGT calculation of the sizes of the self-conjugate A=4n nuclei { 4 He, 8 Be, 12 C, 16 O, 20 Ne, 24 Mg, 28 Si, 32 S, 36 Ar, 40 Ca} also agree well with experiment. OverviewWe will show that the matter and charge radii of the helium isotopes can be calculated ab initio purely from the geometry of

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Energy levels of light nuclei

Cited by 828 publications

References 1,092 publications

Observation ofαdecay from a state in10B at 11.48 MeV

Observation ofαdecay from a state in10B at 11.48 MeV

The ⁷Li (n,γ)⁸Li radiative capture at astrophysical energies

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

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Energy levels of light nuclei

Cited by 828 publications

References 1,092 publications

Observation ofαdecay from a state in10B at 11.48 MeV

Observation ofαdecay from a state in10B at 11.48 MeV

The 7Li (n,γ)8Li radiative capture at astrophysical energies

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Contact Info

Product

Resources

About

The ⁷Li (n,γ)⁸Li radiative capture at astrophysical energies