Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction

N. P. Harrington; D. Branford; K. Föhl; E. Roche; J. R M Annand; R. Beck; P. Grabmayr; T. Hehl; D. Hornidge; K. Livingston; J. C. McGreorge; I. J D MacGregor; I. Martin; K. Monstad; F. Moschini; A. Reiter; S. Waddell; D. P. Watts; S. Young

doi:10.1103/PhysRevC.75.044311

Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction

N. P. Harrington, D. Branford^*, K. Föhl, E. Roche, J. R M Annand, R. Beck, P. Grabmayr, T. Hehl, D. Hornidge, K. Livingston, J. C. McGreorge, I. J D MacGregor, I. Martin, K. Monstad, F. Moschini, A. Reiter, S. Waddell, D. P. Watts, S. Young

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The reaction Li6(γ,π+)He6 was studied over the angular range θπ=40-150° with the aim of investigating the halo structure of He6. Photons from a bremsstrahlung beam were tagged in the energy range Eγ=170-220 MeV at a resolution of ΔEγ=630 keV, and positively charged pions detected using high resolution stacked HpGe detectors. The measured angular distributions for the resolved He6 ground and 1.80 MeV excited states are compared to previous measurements and theoretical calculations based on the impulse approximation. It is deduced that the ground state rms radius of the He6 nucleus may be larger than previously thought and that the first excited 1.80 MeV state may also be a halo state.

Original language	English
Article number	044311
Journal	Physical Review C
Volume	75
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.75.044311
Publication status	Published - 24 Apr 2007

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Harrington, N. P., Branford, D., Föhl, K., Roche, E., Annand, J. R. M., Beck, R., Grabmayr, P., Hehl, T., Hornidge, D., Livingston, K., McGreorge, J. C., MacGregor, I. J. D., Martin, I., Monstad, K., Moschini, F., Reiter, A., Waddell, S., Watts, D. P., & Young, S. (2007). Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction. Physical Review C, 75(4), Article 044311. https://doi.org/10.1103/PhysRevC.75.044311

@article{88296a54d3ec40d5a545c42cb7e30c3e,

title = "Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction",

abstract = "The reaction Li6(γ,π+)He6 was studied over the angular range θπ=40-150° with the aim of investigating the halo structure of He6. Photons from a bremsstrahlung beam were tagged in the energy range Eγ=170-220 MeV at a resolution of ΔEγ=630 keV, and positively charged pions detected using high resolution stacked HpGe detectors. The measured angular distributions for the resolved He6 ground and 1.80 MeV excited states are compared to previous measurements and theoretical calculations based on the impulse approximation. It is deduced that the ground state rms radius of the He6 nucleus may be larger than previously thought and that the first excited 1.80 MeV state may also be a halo state.",

author = "Harrington, \{N. P.\} and D. Branford and K. F{\"o}hl and E. Roche and Annand, \{J. R M\} and R. Beck and P. Grabmayr and T. Hehl and D. Hornidge and K. Livingston and McGreorge, \{J. C.\} and MacGregor, \{I. J D\} and I. Martin and K. Monstad and F. Moschini and A. Reiter and S. Waddell and Watts, \{D. P.\} and S. Young",

year = "2007",

month = apr,

day = "24",

doi = "10.1103/PhysRevC.75.044311",

language = "English",

volume = "75",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Harrington, NP, Branford, D, Föhl, K, Roche, E, Annand, JRM, Beck, R, Grabmayr, P, Hehl, T, Hornidge, D, Livingston, K, McGreorge, JC, MacGregor, IJD, Martin, I, Monstad, K, Moschini, F, Reiter, A, Waddell, S, Watts, DP & Young, S 2007, 'Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction', Physical Review C, vol. 75, no. 4, 044311. https://doi.org/10.1103/PhysRevC.75.044311

TY - JOUR

T1 - Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction

AU - Harrington, N. P.

AU - Branford, D.

AU - Föhl, K.

AU - Roche, E.

AU - Annand, J. R M

AU - Beck, R.

AU - Grabmayr, P.

AU - Hehl, T.

AU - Hornidge, D.

AU - Livingston, K.

AU - McGreorge, J. C.

AU - MacGregor, I. J D

AU - Martin, I.

AU - Monstad, K.

AU - Moschini, F.

AU - Reiter, A.

AU - Waddell, S.

AU - Watts, D. P.

AU - Young, S.

PY - 2007/4/24

Y1 - 2007/4/24

N2 - The reaction Li6(γ,π+)He6 was studied over the angular range θπ=40-150° with the aim of investigating the halo structure of He6. Photons from a bremsstrahlung beam were tagged in the energy range Eγ=170-220 MeV at a resolution of ΔEγ=630 keV, and positively charged pions detected using high resolution stacked HpGe detectors. The measured angular distributions for the resolved He6 ground and 1.80 MeV excited states are compared to previous measurements and theoretical calculations based on the impulse approximation. It is deduced that the ground state rms radius of the He6 nucleus may be larger than previously thought and that the first excited 1.80 MeV state may also be a halo state.

AB - The reaction Li6(γ,π+)He6 was studied over the angular range θπ=40-150° with the aim of investigating the halo structure of He6. Photons from a bremsstrahlung beam were tagged in the energy range Eγ=170-220 MeV at a resolution of ΔEγ=630 keV, and positively charged pions detected using high resolution stacked HpGe detectors. The measured angular distributions for the resolved He6 ground and 1.80 MeV excited states are compared to previous measurements and theoretical calculations based on the impulse approximation. It is deduced that the ground state rms radius of the He6 nucleus may be larger than previously thought and that the first excited 1.80 MeV state may also be a halo state.

UR - https://www.scopus.com/pages/publications/34247330598

U2 - 10.1103/PhysRevC.75.044311

DO - 10.1103/PhysRevC.75.044311

M3 - Article

AN - SCOPUS:34247330598

SN - 0556-2813

VL - 75

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044311

ER -

Experimental study of the halo nucleus He6 using the Li6(γ,π+)He6 reaction

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