Evidence for a 3.8 MeV state in Be 9

R. Smith; C. Wheldon; M. Freer; N. Curtis; Tz. Kokalova; S. Almaraz-Calderon; A. Aprahamian; N. I. Ashwood; M. Barr; B. Bucher; P. Copp; M. Couder; X. Fang; G. Goldring; F. Jung; S. R. Lesher; W. Lu; J. D. Malcolm; A. Roberts; W. P. Tan; V. A. Ziman

doi:10.1103/PhysRevC.94.014320

Evidence for a 3.8 MeV state in Be 9

R. Smith
, C. Wheldon
, M. Freer
, N. Curtis
, Tz. Kokalova
, S. Almaraz-Calderon
, A. Aprahamian
, N. I. Ashwood
, M. Barr
, B. Bucher
, P. Copp
, M. Couder
, X. Fang
, G. Goldring
, F. Jung
, S. R. Lesher
, W. Lu
, J. D. Malcolm
, A. Roberts
, W. P. Tan

V. A. Ziman

Physics

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

6 Scopus citations

Abstract

The breakup reaction Be9(He4,3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in Be9 up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in Be9 at 3.82-0.09+0.08 MeV with Γ=1240-90+270 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus B9. An analysis of the reduced widths (Beg.s.8 channel) of this state along with the proposed mirror state has led to a firm limit of J≤7/2 and a tentative assignment of Jπ=1/2- or 3/2-.

Original language	English
Article number	014320
Journal	Physical Review C
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.94.014320
State	Published - Jul 25 2016

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10.1103/PhysRevC.94.014320

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Smith, R., Wheldon, C., Freer, M., Curtis, N., Kokalova, T., Almaraz-Calderon, S., Aprahamian, A., Ashwood, N. I., Barr, M., Bucher, B., Copp, P., Couder, M., Fang, X., Goldring, G., Jung, F., Lesher, S. R., Lu, W., Malcolm, J. D., Roberts, A., ... Ziman, V. A. (2016). Evidence for a 3.8 MeV state in Be 9. Physical Review C, 94(1), Article 014320. https://doi.org/10.1103/PhysRevC.94.014320

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title = "Evidence for a 3.8 MeV state in Be 9",

abstract = "The breakup reaction Be9(He4,3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in Be9 up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in Be9 at 3.82-0.09+0.08 MeV with Γ=1240-90+270 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus B9. An analysis of the reduced widths (Beg.s.8 channel) of this state along with the proposed mirror state has led to a firm limit of J≤7/2 and a tentative assignment of Jπ=1/2- or 3/2-.",

author = "R. Smith and C. Wheldon and M. Freer and N. Curtis and Tz. Kokalova and S. Almaraz-Calderon and A. Aprahamian and Ashwood, \{N. I.\} and M. Barr and B. Bucher and P. Copp and M. Couder and X. Fang and G. Goldring and F. Jung and Lesher, \{S. R.\} and W. Lu and Malcolm, \{J. D.\} and A. Roberts and Tan, \{W. P.\} and Ziman, \{V. A.\}",

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doi = "10.1103/PhysRevC.94.014320",

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Smith, R, Wheldon, C, Freer, M, Curtis, N, Kokalova, T, Almaraz-Calderon, S, Aprahamian, A, Ashwood, NI, Barr, M, Bucher, B, Copp, P, Couder, M, Fang, X, Goldring, G, Jung, F, Lesher, SR, Lu, W, Malcolm, JD, Roberts, A, Tan, WP & Ziman, VA 2016, 'Evidence for a 3.8 MeV state in Be 9', Physical Review C, vol. 94, no. 1, 014320. https://doi.org/10.1103/PhysRevC.94.014320

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T1 - Evidence for a 3.8 MeV state in Be 9

AU - Smith, R.

AU - Wheldon, C.

AU - Freer, M.

AU - Curtis, N.

AU - Kokalova, Tz.

AU - Almaraz-Calderon, S.

AU - Aprahamian, A.

AU - Ashwood, N. I.

AU - Barr, M.

AU - Bucher, B.

AU - Copp, P.

AU - Couder, M.

AU - Fang, X.

AU - Goldring, G.

AU - Jung, F.

AU - Lesher, S. R.

AU - Lu, W.

AU - Malcolm, J. D.

AU - Roberts, A.

AU - Tan, W. P.

AU - Ziman, V. A.

PY - 2016/7/25

Y1 - 2016/7/25

N2 - The breakup reaction Be9(He4,3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in Be9 up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in Be9 at 3.82-0.09+0.08 MeV with Γ=1240-90+270 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus B9. An analysis of the reduced widths (Beg.s.8 channel) of this state along with the proposed mirror state has led to a firm limit of J≤7/2 and a tentative assignment of Jπ=1/2- or 3/2-.

AB - The breakup reaction Be9(He4,3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in Be9 up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in Be9 at 3.82-0.09+0.08 MeV with Γ=1240-90+270 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus B9. An analysis of the reduced widths (Beg.s.8 channel) of this state along with the proposed mirror state has led to a firm limit of J≤7/2 and a tentative assignment of Jπ=1/2- or 3/2-.

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VL - 94

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ER -

Evidence for a 3.8 MeV state in Be 9

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