Three-body continuum structure and response functions of halo nuclei (I): 6He |
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| Institution: | 1. The Kurchatov Institute, 123182 Moscow, Russia;2. Department of Physics, University of Surrey, Guildford GU2 5XH, UK;3. SENTEF, Institute of Physics, University of Bergen, Norway;4. NORDITA, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark;5. Department of Physics, Chalmers University of Technology, Göteborg, Sweden;6. Göteborg University, Göteborg, Sweden;1. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia;2. Department of Physics, Donbass State Engineering Academy, Shcadinova 72, 84313 Kramatorsk, Ukraine;3. Centro de Investigación en Ciencias, Instituto de Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209 Cuernavaca, Morelos, Mexico;1. Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA;2. Department of Physics, Faculty of Science, Payame Noor University, Iran;1. Departamento de Física Atómica, Molecular y Nuclear and Instituto Carlos I de Fisica Teórica y Computacional, Universidad de Granada, E-18071 Granada, Spain;2. Centro de Rádio-Astronomia e Astrofísica Mackenzie, Escola de Engenharia, Universidade Presbiteriana Mackenzie, Brazil;3. Grupo de Óptica e Modelagem Numérica – GOMNI, Faculdade de Tecnologia – FT, Universidade Estadual de Campinas – UNICAMP, Brazil;1. Department of Physics Education and Physics, RCDAMP, Pusan National University, Busan 609-735, Republic of Korea;2. Department of Cogno-mechatronics and Nanofusion, Pusan National University, Busan 609-735, Republic of Korea;3. College of Liberal Arts and Sciences, Anyang University, Gyeonggi-do 430-714, Republic of Korea;4. Nano-Photonics Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;5. Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom |
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| Abstract: | Three-body scattering states of the Borromean two-neutron halo nuclei are explored in a core + n + n model using the method of hyperspherical harmonics. We analyse the continuum structure (the properties of the continuum wave functions) separately from the continuum response (the magnitudes of one-step transitions from the ground state to the continuum). Predictions are made for the positions and strengths of the isoscalar monopole, electric dipole and quadrupole excitations, as well as for nuclear inelastic and charge-exchange response functions, for the 6He nucleus. The known 2+ resonance in 6He is reproduced. We find 1? strength concentrations at lower energies in the proximity of the three-body threshold, and predict new 2+, 1+ (and possibly 0+) resonances at slightly higher energies in 6He. |
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