Helium clustering in neutron-rich Be isotopes

N. I. Ashwood; M. Freer; S. Ahmed; J. C. Angélique; V. Bouchat; W. N. Catford; N. M. Clarke; N. Curtis; O. Dorvaux; B. R. Fulton; F. Hanappe; Y. Kerckx; M. Labiche; J. L. Lecouey; R. C. Lemmon; F. M. Marqués; T. Materna; A. Ninane; G. Normand; N. A. Orr; S. Pain; N. Soić; L. Stuttgé; C. Timis; A. Unshakova; J. S. Winfield; V. A. Ziman

doi:10.1016/j.physletb.2003.11.035

Helium clustering in neutron-rich Be isotopes

N. I. Ashwood, M. Freer, S. Ahmed, J. C. Angélique, V. Bouchat, W. N. Catford, N. M. Clarke, N. Curtis, O. Dorvaux, B. R. Fulton, F. Hanappe, Y. Kerckx, M. Labiche, J. L. Lecouey, R. C. Lemmon, F. M. Marqués, T. Materna, A. Ninane, G. Normand, N. A. OrrS. Pain, N. Soić, L. Stuttgé, C. Timis, A. Unshakova, J. S. Winfield, V. A. Ziman

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Abstract

Measurements of the helium-cluster breakup and neutron removal cross-sections for neutron-rich Be isotopes ^10-12,14Be are presented. These have been studied in the 30 to 42 MeV/nucleon energy range where reaction measurements are proposed to be sensitive to the cluster content of the ground-state wave-function. These measurements provide a comprehensive survey of the decay processes of the Be isotopes by which the valence neutrons are removed revealing the underlying α-α core-cluster structure. The measurements indicate that clustering in the Be isotopes remains important up to the drip-line nucleus ¹⁴Be and that the dominant helium-cluster structure in the neutron-rich Be isotopes corresponds to α-Xn-α.

Original language	English
Pages (from-to)	129-136
Number of pages	8
Journal	Physics Letters B
Volume	580
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2003.11.035
State	Published - Feb 5 2004
Externally published	Yes

Funding

The authors are grateful to the technical and operations staff of LPC and GANIL for help in preparing and executing the experiments described here. This work was funded by the EPSRC (UK) and the IN2P3-CNRS (France). Additional support was provided by the Human Capital and Mobility Programme of the European Community (Contract no. CHGE-CT94-0056).

Funders	Funder number
IN2P3-CNRS
Engineering and Physical Sciences Research Council
European Commission	CHGE-CT94-0056

Keywords

Anti-symmetrized Molecular Dynamics
Beryllium
Breakup
Clustering
Cross-sections
Knockout

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10.1016/j.physletb.2003.11.035

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Ashwood, N. I., Freer, M., Ahmed, S., Angélique, J. C., Bouchat, V., Catford, W. N., Clarke, N. M., Curtis, N., Dorvaux, O., Fulton, B. R., Hanappe, F., Kerckx, Y., Labiche, M., Lecouey, J. L., Lemmon, R. C., Marqués, F. M., Materna, T., Ninane, A., Normand, G., ... Ziman, V. A. (2004). Helium clustering in neutron-rich Be isotopes. Physics Letters B, 580(3-4), 129-136. https://doi.org/10.1016/j.physletb.2003.11.035

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title = "Helium clustering in neutron-rich Be isotopes",

abstract = "Measurements of the helium-cluster breakup and neutron removal cross-sections for neutron-rich Be isotopes 10-12,14Be are presented. These have been studied in the 30 to 42 MeV/nucleon energy range where reaction measurements are proposed to be sensitive to the cluster content of the ground-state wave-function. These measurements provide a comprehensive survey of the decay processes of the Be isotopes by which the valence neutrons are removed revealing the underlying α-α core-cluster structure. The measurements indicate that clustering in the Be isotopes remains important up to the drip-line nucleus 14Be and that the dominant helium-cluster structure in the neutron-rich Be isotopes corresponds to α-Xn-α.",

keywords = "Anti-symmetrized Molecular Dynamics, Beryllium, Breakup, Clustering, Cross-sections, Knockout",

author = "Ashwood, {N. I.} and M. Freer and S. Ahmed and Ang{\'e}lique, {J. C.} and V. Bouchat and Catford, {W. N.} and Clarke, {N. M.} and N. Curtis and O. Dorvaux and Fulton, {B. R.} and F. Hanappe and Y. Kerckx and M. Labiche and Lecouey, {J. L.} and Lemmon, {R. C.} and Marqu{\'e}s, {F. M.} and T. Materna and A. Ninane and G. Normand and Orr, {N. A.} and S. Pain and N. Soi{\'c} and L. Stuttg{\'e} and C. Timis and A. Unshakova and Winfield, {J. S.} and Ziman, {V. A.}",

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doi = "10.1016/j.physletb.2003.11.035",

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Ashwood, NI, Freer, M, Ahmed, S, Angélique, JC, Bouchat, V, Catford, WN, Clarke, NM, Curtis, N, Dorvaux, O, Fulton, BR, Hanappe, F, Kerckx, Y, Labiche, M, Lecouey, JL, Lemmon, RC, Marqués, FM, Materna, T, Ninane, A, Normand, G, Orr, NA, Pain, S, Soić, N, Stuttgé, L, Timis, C, Unshakova, A, Winfield, JS & Ziman, VA 2004, 'Helium clustering in neutron-rich Be isotopes', Physics Letters B, vol. 580, no. 3-4, pp. 129-136. https://doi.org/10.1016/j.physletb.2003.11.035

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T1 - Helium clustering in neutron-rich Be isotopes

AU - Ashwood, N. I.

AU - Freer, M.

AU - Ahmed, S.

AU - Angélique, J. C.

AU - Bouchat, V.

AU - Catford, W. N.

AU - Clarke, N. M.

AU - Curtis, N.

AU - Dorvaux, O.

AU - Fulton, B. R.

AU - Hanappe, F.

AU - Kerckx, Y.

AU - Labiche, M.

AU - Lecouey, J. L.

AU - Lemmon, R. C.

AU - Marqués, F. M.

AU - Materna, T.

AU - Ninane, A.

AU - Normand, G.

AU - Orr, N. A.

AU - Pain, S.

AU - Soić, N.

AU - Stuttgé, L.

AU - Timis, C.

AU - Unshakova, A.

AU - Winfield, J. S.

AU - Ziman, V. A.

PY - 2004/2/5

Y1 - 2004/2/5

N2 - Measurements of the helium-cluster breakup and neutron removal cross-sections for neutron-rich Be isotopes 10-12,14Be are presented. These have been studied in the 30 to 42 MeV/nucleon energy range where reaction measurements are proposed to be sensitive to the cluster content of the ground-state wave-function. These measurements provide a comprehensive survey of the decay processes of the Be isotopes by which the valence neutrons are removed revealing the underlying α-α core-cluster structure. The measurements indicate that clustering in the Be isotopes remains important up to the drip-line nucleus 14Be and that the dominant helium-cluster structure in the neutron-rich Be isotopes corresponds to α-Xn-α.

AB - Measurements of the helium-cluster breakup and neutron removal cross-sections for neutron-rich Be isotopes 10-12,14Be are presented. These have been studied in the 30 to 42 MeV/nucleon energy range where reaction measurements are proposed to be sensitive to the cluster content of the ground-state wave-function. These measurements provide a comprehensive survey of the decay processes of the Be isotopes by which the valence neutrons are removed revealing the underlying α-α core-cluster structure. The measurements indicate that clustering in the Be isotopes remains important up to the drip-line nucleus 14Be and that the dominant helium-cluster structure in the neutron-rich Be isotopes corresponds to α-Xn-α.

KW - Anti-symmetrized Molecular Dynamics

KW - Beryllium

KW - Breakup

KW - Clustering

KW - Cross-sections

KW - Knockout

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DO - 10.1016/j.physletb.2003.11.035

M3 - Article

AN - SCOPUS:10744225530

SN - 0370-2693

VL - 580

SP - 129

EP - 136

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Helium clustering in neutron-rich Be isotopes

Abstract

Funding

Keywords

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