B(E1) strengths from Coulomb excitation of Be-11

N. C. Summers; S. D. Pain; N. A. Orr; W. N. Catford; J. C. Angelique; N. I. Ashwood; V. Bouchat; N. M. Clarke; N. Curtis; M. Freer; B. R. Fulton; F. Hanappe; M. Labiche; J. L. Lecouey; R. C. Lemmon; D. Mahboub; A. Ninane; G. Normand; F. M. Nunes; N. Soic; L. Stuttge; C. N. Timis; I. J. Thompson; J. S. Winfield; V. Ziman

doi:10.1016/j.physletb.2007.05.003

B(E1) strengths from Coulomb excitation of Be-11

N. C. Summers, S. D. Pain, N. A. Orr, W. N. Catford, J. C. Angelique, N. I. Ashwood, V. Bouchat, N. M. Clarke, N. Curtis, M. Freer, B. R. Fulton, F. Hanappe, M. Labiche, J. L. Lecouey, R. C. Lemmon, D. Mahboub, A. Ninane, G. Normand, F. M. Nunes, N. SoicL. Stuttge, C. N. Timis, I. J. Thompson, J. S. Winfield, V. Ziman

Physics

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

Abstract

The B(E1; 1/2(+) --> 1/2(-)) strength for Be-11 has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for Be-11 + Pb-208 at 38.6 MeV/nucleon is reported. The B(E1) strength of 0.105(12) e(2) fm(2) derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, in contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e(2) fm(2). This value is in good agreement with the value deduced independently from the lifetime of the 1/2(-) state in Be-11, and has a comparable precision. (C) 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	124-128
Number of pages	5
Journal	Physics Letters B
Volume	650
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2007.05.003
Publication status	Published - 28 Jun 2007

Keywords

COUPLED-CHANNELS
CORE EXCITATION
HEAVY-IONS

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10.1016/j.physletb.2007.05.003

Cite this

Summers, N. C., Pain, S. D., Orr, N. A., Catford, W. N., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Nunes, F. M., ... Ziman, V. (2007). B(E1) strengths from Coulomb excitation of Be-11. Physics Letters B, 650(2-3), 124-128. https://doi.org/10.1016/j.physletb.2007.05.003

@article{692bcbef58b5472a85a03ec0bd4374bc,

title = "B(E1) strengths from Coulomb excitation of Be-11",

abstract = "The B(E1; 1/2(+) --> 1/2(-)) strength for Be-11 has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for Be-11 + Pb-208 at 38.6 MeV/nucleon is reported. The B(E1) strength of 0.105(12) e(2) fm(2) derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, in contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e(2) fm(2). This value is in good agreement with the value deduced independently from the lifetime of the 1/2(-) state in Be-11, and has a comparable precision. (C) 2007 Elsevier B.V. All rights reserved.",

keywords = "COUPLED-CHANNELS, CORE EXCITATION, HEAVY-IONS",

author = "Summers, {N. C.} and Pain, {S. D.} and Orr, {N. A.} and Catford, {W. N.} and Angelique, {J. C.} and Ashwood, {N. I.} and V. Bouchat and Clarke, {N. M.} and N. Curtis and M. Freer and Fulton, {B. R.} and F. Hanappe and M. Labiche and Lecouey, {J. L.} and Lemmon, {R. C.} and D. Mahboub and A. Ninane and G. Normand and Nunes, {F. M.} and N. Soic and L. Stuttge and Timis, {C. N.} and Thompson, {I. J.} and Winfield, {J. S.} and V. Ziman",

year = "2007",

month = jun,

day = "28",

doi = "10.1016/j.physletb.2007.05.003",

language = "English",

volume = "650",

pages = "124--128",

journal = "Physics Letters B",

issn = "0370-2693",

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Summers, NC, Pain, SD, Orr, NA, Catford, WN, Angelique, JC, Ashwood, NI, Bouchat, V, Clarke, NM, Curtis, N, Freer, M, Fulton, BR, Hanappe, F, Labiche, M, Lecouey, JL, Lemmon, RC, Mahboub, D, Ninane, A, Normand, G, Nunes, FM, Soic, N, Stuttge, L, Timis, CN, Thompson, IJ, Winfield, JS & Ziman, V 2007, 'B(E1) strengths from Coulomb excitation of Be-11', Physics Letters B, vol. 650, no. 2-3, pp. 124-128. https://doi.org/10.1016/j.physletb.2007.05.003

TY - JOUR

T1 - B(E1) strengths from Coulomb excitation of Be-11

AU - Summers, N. C.

AU - Pain, S. D.

AU - Orr, N. A.

AU - Catford, W. N.

AU - Angelique, J. C.

AU - Ashwood, N. I.

AU - Bouchat, V.

AU - Clarke, N. M.

AU - Curtis, N.

AU - Freer, M.

AU - Fulton, B. R.

AU - Hanappe, F.

AU - Labiche, M.

AU - Lecouey, J. L.

AU - Lemmon, R. C.

AU - Mahboub, D.

AU - Ninane, A.

AU - Normand, G.

AU - Nunes, F. M.

AU - Soic, N.

AU - Stuttge, L.

AU - Timis, C. N.

AU - Thompson, I. J.

AU - Winfield, J. S.

AU - Ziman, V.

PY - 2007/6/28

Y1 - 2007/6/28

N2 - The B(E1; 1/2(+) --> 1/2(-)) strength for Be-11 has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for Be-11 + Pb-208 at 38.6 MeV/nucleon is reported. The B(E1) strength of 0.105(12) e(2) fm(2) derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, in contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e(2) fm(2). This value is in good agreement with the value deduced independently from the lifetime of the 1/2(-) state in Be-11, and has a comparable precision. (C) 2007 Elsevier B.V. All rights reserved.

AB - The B(E1; 1/2(+) --> 1/2(-)) strength for Be-11 has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for Be-11 + Pb-208 at 38.6 MeV/nucleon is reported. The B(E1) strength of 0.105(12) e(2) fm(2) derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, in contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e(2) fm(2). This value is in good agreement with the value deduced independently from the lifetime of the 1/2(-) state in Be-11, and has a comparable precision. (C) 2007 Elsevier B.V. All rights reserved.

KW - COUPLED-CHANNELS

KW - CORE EXCITATION

KW - HEAVY-IONS

U2 - 10.1016/j.physletb.2007.05.003

DO - 10.1016/j.physletb.2007.05.003

M3 - Article

SN - 0370-2693

VL - 650

SP - 124

EP - 128

JO - Physics Letters B

JF - Physics Letters B

IS - 2-3

ER -