Breakup branches of Borromean beryllium-9

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

doi:10.1063/1.4932289

Breakup branches of Borromean beryllium-9

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

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 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in ⁹Be have been explored including the ⁸Be_g.s. + n, ⁸Be₂ ⁺ + n and ⁵He_g.s. + ⁴He channels. By imposing the condition that the breakup proceeded via the ⁸Be ground state, clean excitation spectra for ⁹Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.

Original language	English
Title of host publication	Nuclear Structure and Dynamics 2015
Publisher	AIP Publishing
Volume	1681
ISBN (Electronic)	9780735413283
DOIs	https://doi.org/10.1063/1.4932289
Publication status	Published - 15 Oct 2015
Event	3rd International Conference on Nuclear Structure and Dynamics - Portoroz, Slovenia Duration: 14 Jun 2015 → 19 Jun 2015

Conference

Conference	3rd International Conference on Nuclear Structure and Dynamics
Country/Territory	Slovenia
City	Portoroz
Period	14/06/15 → 19/06/15

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.4932289

Cite this

Smith, R., Freer, M., Wheldon, C., Curtis, N., Almaraz-Calderon, S., Aprahamian, A., Ashwood, N. I., Barr, M., Bucher, B., Copp, P., Couder, M., Fang, X., Goldring, G., Jung, F., Kokalova Wheldon, T., Lesher, S. R., Lu, W., Malcolm, J. D., Roberts, A., ... Ziman, V. (2015). Breakup branches of Borromean beryllium-9. In Nuclear Structure and Dynamics 2015 (Vol. 1681). Article 060003 AIP Publishing. https://doi.org/10.1063/1.4932289

@inproceedings{e558bdd552084e8980f9888763d96c9f,

title = "Breakup branches of Borromean beryllium-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 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in 9Be have been explored including the 8Beg.s. + n, 8Be2 + + n and 5Heg.s. + 4He channels. By imposing the condition that the breakup proceeded via the 8Be ground state, clean excitation spectra for 9Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.",

author = "Robin Smith and M. Freer and C. Wheldon and N. Curtis 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 {Kokalova Wheldon}, Tzanka and Lesher, {S. R.} and W. Lu and Malcolm, {J. D.} and A. Roberts and Tan, {W. P.} and Victor Ziman",

year = "2015",

month = oct,

day = "15",

doi = "10.1063/1.4932289",

language = "English",

volume = "1681",

booktitle = "Nuclear Structure and Dynamics 2015",

publisher = "AIP Publishing",

address = "United States",

note = "3rd International Conference on Nuclear Structure and Dynamics ; Conference date: 14-06-2015 Through 19-06-2015",

}

Smith, R, Freer, M , Wheldon, C , Curtis, N, Almaraz-Calderon, S, Aprahamian, A, Ashwood, NI, Barr, M, Bucher, B, Copp, P, Couder, M, Fang, X, Goldring, G, Jung, F, Kokalova Wheldon, T, Lesher, SR, Lu, W, Malcolm, JD, Roberts, A, Tan, WP & Ziman, V 2015, Breakup branches of Borromean beryllium-9. in Nuclear Structure and Dynamics 2015. vol. 1681, 060003, AIP Publishing, 3rd International Conference on Nuclear Structure and Dynamics, Portoroz, Slovenia, 14/06/15. https://doi.org/10.1063/1.4932289

TY - GEN

T1 - Breakup branches of Borromean beryllium-9

AU - Smith, Robin

AU - Freer, M.

AU - Wheldon, C.

AU - Curtis, N.

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 - Kokalova Wheldon, Tzanka

AU - Lesher, S. R.

AU - Lu, W.

AU - Malcolm, J. D.

AU - Roberts, A.

AU - Tan, W. P.

AU - Ziman, Victor

PY - 2015/10/15

Y1 - 2015/10/15

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 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in 9Be have been explored including the 8Beg.s. + n, 8Be2 + + n and 5Heg.s. + 4He channels. By imposing the condition that the breakup proceeded via the 8Be ground state, clean excitation spectra for 9Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.

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 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in 9Be have been explored including the 8Beg.s. + n, 8Be2 + + n and 5Heg.s. + 4He channels. By imposing the condition that the breakup proceeded via the 8Be ground state, clean excitation spectra for 9Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.

UR - http://www.scopus.com/inward/record.url?scp=85006195296&partnerID=8YFLogxK

U2 - 10.1063/1.4932289

DO - 10.1063/1.4932289

M3 - Conference contribution

AN - SCOPUS:85006195296

VL - 1681

BT - Nuclear Structure and Dynamics 2015

PB - AIP Publishing

T2 - 3rd International Conference on Nuclear Structure and Dynamics

Y2 - 14 June 2015 through 19 June 2015

ER -

Breakup branches of Borromean beryllium-9

Abstract

Conference

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this