B (E 1) strengths from Coulomb excitation of 11Be

N. C. Summers; S. D. Pain; N. A. Orr; W. N. Catford; J. C. Angélique; 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. Soić; L. Stuttge; C. N. Timis; I. J. Thompson; J. S. Winfield; V. Ziman

doi:10.1016/j.physletb.2007.05.003

B (E 1) strengths from Coulomb excitation of ¹¹Be

N. C. Summers, S. D. Pain, N. A. Orr, W. N. Catford, J. C. Angélique, 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. SoićL. Stuttge, C. N. Timis, I. J. Thompson, J. S. Winfield, V. Ziman

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Abstract

The B (E 1 ; 1 / 2⁺ → 1 / 2^-) strength for ¹¹Be 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 ¹¹Be + ²⁰⁸Pb at 38.6 MeV/nucleon is reported. The B (E 1) strength of 0.105(12) e² fm² 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) e² fm². This value is in good agreement with the value deduced independently from the lifetime of the 1 / 2^- state in ¹¹Be, and has a comparable precision.

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
State	Published - Jun 28 2007
Externally published	Yes

Funding

This work was supported in part by NNSA through DOE Cooperative Agreement DEFC03-03NA00143, NSCL, Michigan State University, and the National Science Foundation through grant PHY-0456656, and under the auspices of the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. The authors wish to acknowledge the support provided by the technical staff of LPC and GANIL. Partial support through the EU Human Mobility programme of the European Community is also acknowledged. The calculations were performed at the HPCC at MSU.

Funders	Funder number
NSCL
National Science Foundation	PHY-0456656
National Science Foundation
U.S. Department of Energy	DEFC03-03NA00143
U.S. Department of Energy
Directorate for Mathematical and Physical Sciences	0456656
Directorate for Mathematical and Physical Sciences
University of California
National Nuclear Security Administration
Lawrence Livermore National Laboratory
Michigan State University

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Summers, N. C., Pain, S. D., Orr, N. A., Catford, W. N., Angélique, 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 (E 1) strengths from Coulomb excitation of ¹¹Be. Physics Letters B, 650(2-3), 124-128. https://doi.org/10.1016/j.physletb.2007.05.003

@article{36e519ef616042be9a6683b9bc10aed4,

title = "B (E 1) strengths from Coulomb excitation of 11Be",

abstract = "The B (E 1 ; 1 / 2+ → 1 / 2-) strength for 11Be 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 11Be + 208Pb at 38.6 MeV/nucleon is reported. The B (E 1) strength of 0.105(12) e2 fm2 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) e2 fm2. This value is in good agreement with the value deduced independently from the lifetime of the 1 / 2- state in 11Be, and has a comparable precision.",

author = "Summers, {N. C.} and Pain, {S. D.} and Orr, {N. A.} and Catford, {W. N.} and Ang{\'e}lique, {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. Soi{\'c} 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",

publisher = "Elsevier",

number = "2-3",

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Summers, NC, Pain, SD, Orr, NA, Catford, WN, Angélique, 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, Soić, N, Stuttge, L, Timis, CN, Thompson, IJ, Winfield, JS & Ziman, V 2007, 'B (E 1) strengths from Coulomb excitation of ¹¹Be', 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 (E 1) strengths from Coulomb excitation of 11Be

AU - Summers, N. C.

AU - Pain, S. D.

AU - Orr, N. A.

AU - Catford, W. N.

AU - Angélique, 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 - Soić, 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 (E 1 ; 1 / 2+ → 1 / 2-) strength for 11Be 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 11Be + 208Pb at 38.6 MeV/nucleon is reported. The B (E 1) strength of 0.105(12) e2 fm2 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) e2 fm2. This value is in good agreement with the value deduced independently from the lifetime of the 1 / 2- state in 11Be, and has a comparable precision.

AB - The B (E 1 ; 1 / 2+ → 1 / 2-) strength for 11Be 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 11Be + 208Pb at 38.6 MeV/nucleon is reported. The B (E 1) strength of 0.105(12) e2 fm2 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) e2 fm2. This value is in good agreement with the value deduced independently from the lifetime of the 1 / 2- state in 11Be, and has a comparable precision.

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U2 - 10.1016/j.physletb.2007.05.003

DO - 10.1016/j.physletb.2007.05.003

M3 - Article

AN - SCOPUS:34250205221

SN - 0370-2693

VL - 650

SP - 124

EP - 128

JO - Physics Letters B

JF - Physics Letters B

IS - 2-3

ER -

B (E 1) strengths from Coulomb excitation of ¹¹Be

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