Three-body correlations in electromagnetic dissociation of Borromean nuclei: The He-6 case
(2005) In Nuclear Physics, Section A 759(1-2). p.23-42- Abstract
- Dissociation of 6He on a lead target has been studied at 240 MeV/u. The four-momenta of the two neutrons in coincidence with greek small letter alpha-particles have been measured and used to reconstruct the three-body energy and angular correlations in the final state. For the first time, three-body correlations were included in the analysis of the 6He dissociation data, and compared with calculations assuming a dipole mode for the electromagnetic dissociation. In addition, the experimental data have been analyzed using a series expansion of the final transition amplitude into hyperspherical functions, showing the importance of both nn and greek small letter alphan final-state interactions. It is shown that the dissociation process is... (More)
- Dissociation of 6He on a lead target has been studied at 240 MeV/u. The four-momenta of the two neutrons in coincidence with greek small letter alpha-particles have been measured and used to reconstruct the three-body energy and angular correlations in the final state. For the first time, three-body correlations were included in the analysis of the 6He dissociation data, and compared with calculations assuming a dipole mode for the electromagnetic dissociation. In addition, the experimental data have been analyzed using a series expansion of the final transition amplitude into hyperspherical functions, showing the importance of both nn and greek small letter alphan final-state interactions. It is shown that the dissociation process is governed by a transition of one neutron from the p-shell in the 6He ground state to the s-shell in the continuum further indicating that the role of the transition through an intermediate 5He(3/2−) state is more important than expected. (Less)
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https://lup.lub.lu.se/record/1133231
- author
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- keywords
- 6He, Unstable nuclei, Coulomb excitation, Particle correlations
- in
- Nuclear Physics, Section A
- volume
- 759
- issue
- 1-2
- pages
- 23 - 42
- publisher
- Elsevier
- external identifiers
-
- scopus:22544434330
- ISSN
- 0375-9474
- DOI
- 10.1016/j.nuclphysa.2005.05.001
- language
- English
- LU publication?
- no
- id
- a5502f96-c943-477f-bf1d-bb9ea0c844f1 (old id 1133231)
- date added to LUP
- 2016-04-01 16:15:58
- date last changed
- 2022-04-06 11:30:22
@article{a5502f96-c943-477f-bf1d-bb9ea0c844f1, abstract = {{Dissociation of 6He on a lead target has been studied at 240 MeV/u. The four-momenta of the two neutrons in coincidence with greek small letter alpha-particles have been measured and used to reconstruct the three-body energy and angular correlations in the final state. For the first time, three-body correlations were included in the analysis of the 6He dissociation data, and compared with calculations assuming a dipole mode for the electromagnetic dissociation. In addition, the experimental data have been analyzed using a series expansion of the final transition amplitude into hyperspherical functions, showing the importance of both nn and greek small letter alphan final-state interactions. It is shown that the dissociation process is governed by a transition of one neutron from the p-shell in the 6He ground state to the s-shell in the continuum further indicating that the role of the transition through an intermediate 5He(3/2−) state is more important than expected.}}, author = {{Chulkov, L V and Simon, H and Thompson, I J and Aumann, T and Borge, M J G and Elze, T W and Emling, H and Geissel, H and Grigorenko, L V and Hellström, Margareta and Jonson, B and Kratz, J W V and Kulessa, R and Markenroth Bloch, Karin and Meister, M and Munzenberg, G and Nickel, F and Nilsson, T and Nyman, G and Pribora, V and Richter, A and Riisager, K and Scheidenberger, C and Schrieder, G and Tengblad, O and Zhukov, M V}}, issn = {{0375-9474}}, keywords = {{6He; Unstable nuclei; Coulomb excitation; Particle correlations}}, language = {{eng}}, number = {{1-2}}, pages = {{23--42}}, publisher = {{Elsevier}}, series = {{Nuclear Physics, Section A}}, title = {{Three-body correlations in electromagnetic dissociation of Borromean nuclei: The He-6 case}}, url = {{http://dx.doi.org/10.1016/j.nuclphysa.2005.05.001}}, doi = {{10.1016/j.nuclphysa.2005.05.001}}, volume = {{759}}, year = {{2005}}, }