Evidence for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>∕</mml:mo><mml:msup><mml:mn>2</mml:mn><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math>state in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mn>7</mml:mn></mml:mmultiscripts></mml:math>

Halderson, Dean

doi:10.1103/physrevc.70.041603

Cited by 16 publications

(32 citation statements)

References 13 publications

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“…The nonresonant S factor is too large in both the RCCSM and the cluster calculation, however, in both works, one can see that the size depends on the interaction. In fact, it is possible to fit the data by altering the interaction; however, FIG [22]. Here it was found that the cross section, determined from a 6hω calculation of 3 H and 3 He, was 12% smaller than that determined from a 0hω calculation of 3 H and 3 He, but only when Q eff 1q was used for the E1 operator.…”

Section: Procedures and Resultsmentioning

confidence: 83%

“…So, to construct an equivalent two-body interaction, the spinorbit component must be increased. The second calculation is a p-shell calculation for 8 Li with the Cohen and Kurath (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) interaction [14]. This is also shown in Fig.…”

Section: The Spin-orbit Interactionmentioning

confidence: 99%

“…From several calculations in the A = 7 systems [9,10], it was determined that the best predictions of continuum phenomena with the M3Y interaction were obtained when one includes only the A -1 core states that are stable to single nucleon emission. This means including the 3/2 − , 1/2 − , and 7/2 − state of 7 Be for 8 B.…”

Section: The Spin-orbit Interactionmentioning

confidence: 99%

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Reactions in theB8andLi8compound systems

Halderson

2006

Phys. Rev. C

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Calculations are reported for reactions in the 8 B and 8 Li compound systems with the recoil corrected continuum shell model. Comparison with observed structure indicates that the spin-orbit component of the M3Y interaction must be modified near the middle of the p shell. Calculations are performed with three spin-orbit strengths. The prediction for 7 Be(p, γ ) 8 B, based on this model and available data, is that S 17 (0) equals 21.63 eV b and S 17 (20) 21.02 eV b. Calculations for 7 Li(n, γ ) 8 Li indicate that the 8 Li, 1 + 2 state is nearly degenerate with the 3 + state. It is shown that a measurement of 7 Li(n, γ ) 8 Li(1 + 1 ) can locate the 0 + state. It is also shown that 7 Be(p, p ) 7 Be(1/2 − ) can locate the 1 + and 0 + strength in 8 B.

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Section: Procedures and Resultsmentioning

confidence: 83%

Section: The Spin-orbit Interactionmentioning

confidence: 99%

Section: The Spin-orbit Interactionmentioning

confidence: 99%

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Reactions in theB8andLi8compound systems

Halderson

2006

Phys. Rev. C

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“…In particular, a resonance is indicated at low energy at 0.9±0.5 MeV (1.3 MeV above 6 He+n threshold), with width Γ = 1.0 ± 0.9 MeV. Within the recoil corrected continuum SM calculations, the possibility of this 1/2 − low-lying state of 7 He is not excluded [21].…”

Section: Discussion Of the 8 He Excitation Spectrummentioning

confidence: 99%

Low-lying states and structure of the exotic 8He via direct reactions on the proton

et al. 2007

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The structure of the light exotic nucleus 8 He was investigated using direct reactions of the 8 He SPIRAL beam on a proton-rich target. The (p,p') scattering to the 2 + 1 state, the (p,d)7 He and (p,t) 6 He transfer reactions, were measured at the energy E lab = 15.7 A.MeV. The light charged particles (p,d,t) were detected in the MUST Si-strip telescope array. The excitation spectrum of 8 He was extracted from the (p,p') reaction. Above the known 2 + 1 excited state at 3.6 MeV, a second resonance was found around 5.4 MeV. The cross sections were analyzed within the coupled-reaction channels framework, using microscopic potentials. It is inferred that the 8 He ground state has a more complex neutron-skin structure than suggested by previous α + 4n models assuming a pure (1p 3/2 ) 4 configuration.

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“…Continuum shell model study [18] shows the ground state resonance 3/2 − at 0.36 MeV and the excited 1/2 − state around an excitation energy of 3.3 MeV. On the other hand, recoil corrected continuum shell model study of Halderson [26] place the resonance energy around 1 MeV.…”

Section: Nuclei Beyond the Neutron Drip Line : 57 Hementioning

confidence: 99%

Relativistic mean field calculations in neutron-rich nuclei

Gangopadhyay¹,

Bhattacharya²,

Roy³

2014

AIP Conference Proceedings

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Abstract. Relativistic mean field calculations have been employed to study neutron rich nuclei. The Lagrange's equations have been solved in the co-ordinate space. The effect of the continuum has been effectively taken into account through the method of resonant continuum. It is found that BCS approximation performs as well as a more involved Relativistic Continuum Hartree Bogoliubov approach. Calculations reveal the possibility of modification of magic numbers in neutron rich nuclei. Calculation for low energy proton scattering cross sections shows that the present approach reproduces the density in very light neutron rich nuclei.

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Evidence for the1∕2−state inHe7

Cited by 16 publications

References 13 publications

Reactions in theB8andLi8compound systems

Reactions in theB8andLi8compound systems

Low-lying states and structure of the exotic 8He via direct reactions on the proton

Relativistic mean field calculations in neutron-rich nuclei

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