Evidence for a 3.8 MeV state in   Be   9

Robin Smith; C. Wheldon; M. Freer; N. Curtis; Tzanka Kokalova Wheldon; 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

Robin Smith, C. Wheldon, M. Freer, N. Curtis, Tzanka Kokalova Wheldon, 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. TanV. A. Ziman

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Abstract

The breakup reaction 9Be(4He ,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 9Be up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in 9Be at 3.82+0.08 -0.09 MeV with = 1240+270 -90 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus 9B. An analysis of the reduced widths (8Beg.s. 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 J π = 1/2− or 3/2−.

Original language	English
Article number	014320
Pages (from-to)	1-9
Number of pages	9
Journal	Physical Review C
Volume	94
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.94.014320
Publication status	Published - 25 Jul 2016

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10.1103/PhysRevC.94.014320

Smith_et_al_Evidence_3.8_MeV_state_Physical_Review_C
©2016 American Physical Society Final publication available online at: https://doi.org/10.1103/PhysRevC.94.014320 Checked 10/10/2016
Final published version, 1.27 MBLicence: None: All rights reserved

Birmingham Nuclear Physics Group Consolidated Grant
Jones, P., Evans, P., Freer, M. & Wheldon, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/14 → 30/09/18
Project: Research Councils
Birmingham Nuclear Physics Consolidated Grant
Freer, M., Evans, P., Jones, P., Wheldon, C. & Lazzeroni, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/11 → 31/07/14
Project: Research Councils
Nuclear Structure, Astrophysics and Reactions (NuSTAR) at FAIR
Freer, M. & Tungate, G.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/07/09 → 31/03/15
Project: Research Councils
Birmingham Nuclear Physics Group Rolling Grant
Tungate, G., Lazzeroni, C., Evans, P., Jones, P. & Freer, M.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/08 → 31/07/13
Project: Research Councils
Advanced Fellowship - Dr Carl Wheldon
Wheldon, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
29/10/07 → 28/10/12
Project: Research

Cite this

Smith, R., Wheldon, C., Freer, M., Curtis, N., Kokalova Wheldon, 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), 1-9. Article 014320. https://doi.org/10.1103/PhysRevC.94.014320

@article{d64191ccbfc94f82b27a5f1fc6ce6810,

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

abstract = "The breakup reaction 9Be(4He ,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 9Be up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in 9Be at 3.82+0.08 -0.09 MeV with = 1240+270 -90 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus 9B. An analysis of the reduced widths (8Beg.s. 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 J π = 1/2− or 3/2−.",

author = "Robin Smith and C. Wheldon and M. Freer and N. Curtis and {Kokalova Wheldon}, Tzanka 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.}",

year = "2016",

month = jul,

day = "25",

doi = "10.1103/PhysRevC.94.014320",

language = "English",

volume = "94",

pages = "1--9",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society (APS)",

number = "1",

}

Smith, R, Wheldon, C , Freer, M , Curtis, N , Kokalova Wheldon, 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, pp. 1-9. https://doi.org/10.1103/PhysRevC.94.014320

TY - JOUR

T1 - Evidence for a 3.8 MeV state in Be 9

AU - Smith, Robin

AU - Wheldon, C.

AU - Freer, M.

AU - Curtis, N.

AU - Kokalova Wheldon, Tzanka

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 9Be(4He ,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 9Be up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in 9Be at 3.82+0.08 -0.09 MeV with = 1240+270 -90 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus 9B. An analysis of the reduced widths (8Beg.s. 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 J π = 1/2− or 3/2−.

AB - The breakup reaction 9Be(4He ,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 9Be up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in 9Be at 3.82+0.08 -0.09 MeV with = 1240+270 -90 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus 9B. An analysis of the reduced widths (8Beg.s. 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 J π = 1/2− or 3/2−.

UR - http://www.mendeley.com/research/evidence-38-mev-state-math-mmultiscripts-mibemi-mprescripts-none-mn9mn-mmultiscripts-math

U2 - 10.1103/PhysRevC.94.014320

DO - 10.1103/PhysRevC.94.014320

M3 - Article

SN - 0556-2813

VL - 94

SP - 1

EP - 9

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 014320

ER -

Evidence for a 3.8 MeV state in Be 9

Abstract

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Projects

Birmingham Nuclear Physics Group Consolidated Grant

Birmingham Nuclear Physics Consolidated Grant

Nuclear Structure, Astrophysics and Reactions (NuSTAR) at FAIR

Birmingham Nuclear Physics Group Rolling Grant

Advanced Fellowship - Dr Carl Wheldon

Cite this