Study of Exotic Nuclei in the Flerov Laboratory of Nuclear Reactions at Joint Institute for Nuclear Research

Parfenova, Yu.L.

doi:10.5506/aphyspolb.49.495

Cited by 3 publications

(5 citation statements)

References 18 publications

(46 reference statements)

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“…Experimentally, 10 He has been observed to be unbound to neutron emission with the ground state identified with a resonance in the continuum, as discussed, e.g., by Parfenova. [32] The simplest interpretation is that the additional size forced upon 10 He by the additional 3k B of entropy is such that the final two neutrons are on average too far distant from the core to remain bound. This is speculation, but it is certainly true that 10 He would be required to be significantly larger, if it were to exist.…”

Section: The Case Of 10 Hementioning

confidence: 99%

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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Section: The Case Of 10 Hementioning

confidence: 99%

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

2021

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“…Experimentally, 10 He has been observed to be unbound to neutron emission with the ground state identified with a resonance in the continuum, as discussed, for example, by Parfenova (2018) 31 .…”

Section: The Case Of 10 Hementioning

confidence: 89%

“…The nuclear sizes of both the helium series and the helium isotopes listed in Tables 1, 2 conform to a QGT treatment using a single uniform holographic wavelength: this is the only "free parameter", and is identified with the measured RMS proton size. It turns out that the sizes of the odd nuclei { 3 H, 7 Li, 11 B, 15 N, 19 F, 23 Na, 27 Al, 31 P, 35 Cl, 39 K} behave similarly with the same holographic wavelength. The case of 6 He→ 6 Li appears to suggest that the beta decay process is associated with the acquisition of an extra DoF by the nucleus.…”

Section: Discussionmentioning

confidence: 99%

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Parker

Jeynes

Catford

2021

Preprint

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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 6He as a 4He core plus a concentric neutron shell comprising a holomorphic pair of neutrons, and the 8He neutron halo is treated as a holomorphic pair of holomorphic pairs. Considering the information content of each system allows a correlation angle of 2pi/3 between the holomorphic entities to be inferred, and then the charge radii of the three isotopes can be calculated from the displacement of the 4He core from the centre of mass. The calculations for the charge and matter radii of 4,6,8He agree closely with observed values. Similar QGT calculation of the sizes of the self-conjugate A = 4n nuclei {4He,8Be,12C,16O,20Ne,24Mg,28Si,32S,36Ar,40Ca} also agree well with experiment.

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Section: The Case Of 10 Hementioning

confidence: 89%

“…as described by Córdoba et al 53 (their Eqs. 29,30). For entropic systems (based on the conjugate variables pS and qS, where we now here include the subscript 'S'…”

Section: Appendix 1: Terminologymentioning

confidence: 99%

Halo Properties in Helium Nuclei From the Perspective of Geometrical Thermodynamics

Parker

Jeynes

Catford

2020

Preprint

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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 a‑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 6He as a 4He core plus a concentric neutron shell comprising a holomorphic pair of neutrons, and the 8He neutron halo is treated as a holomorphic pair of holomorphic pairs. Considering the information content of each system allows a correlation angle of 2/3 between the holomorphic entities to be inferred, and then the charge radii of the three isotopes can be calculated from the displacement of the 4He core from the centre of mass. The calculations for the charge and matter radii of 4,6,8He agree closely with observed values. Similar QGT calculation of the sizes of the self-conjugate A=4n nuclei {4He,8Be,12C,16O,20Ne,24Mg,28Si,32S,36Ar,40Ca} also agree well with experiment.

show abstract

Study of Exotic Nuclei in the Flerov Laboratory of Nuclear Reactions at Joint Institute for Nuclear Research

Cited by 3 publications

References 18 publications

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Halo Properties in Helium Nuclei from the Perspective of Geometrical Thermodynamics

Halo Properties in Helium Nuclei From the Perspective of Geometrical Thermodynamics

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