Pion transfer (n, d) and (d, He-3) reactions leading to deeply bound pionic atoms
Nov, 199019 pages
Published in:
- Nucl.Phys.A 530 (1991) 679-697
- Published: 1991
Report number:
- INS-855
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Abstract: (Elsevier)
Theoretical studies are given on the (n, d) and (d, 3 He) reactions leading to deeply bound pionic atoms in heavy nuclei of configuration [( nl ) π · j n −1 ] J . The cross sections for various pionic and neutron-hole configurations in the case of a 208 Pb target are calculated at incident energies 300–1000 MeV/u by using the effective number approach and the eikonal approximation for distortion. The effective number with a pion in the 1s or 2p state and a neutron hole in the i 13 2 orbit peaks around the same incident energy ( T n = 600 MeV) as the elementary cross section n+n→d+ π − , where the momentum transfer matches the angular-momentum transfer of L = 5–7. The DWIA cross section for (n,d) producing a pion in the 1s or 2p orbit at T n = 600 MeV is found to be around 42 or 75 μb/sr, respectively. At T n = 350 MeV, where the momentum transfer is small, quasi-substitutional states of configurations [(2 p ) π (3 p 1 2 ) n −1 ]L = 0 and [(2 p ) π (3 p 3 2 ) n −1 ]L = 0 are preferentially populated with (n, d) cross sections of 95 and 190 μb/sr, respectively. The (d, 3 He) cross sections are estimated to be an order of magnitude smaller than the (n, d) cross sections. Thus, the (n, d) and (d, 3 He) reactions are found to be suited for the production of deeply bound pionic atoms.- n nucleus: nuclear reaction
- deuteron nucleus: nuclear reaction
- lead
- pi: mesic atom
- atom: mesic atom
- energy levels: mesic atom
- approximation: eikonal
- distorted wave impulse approximation
- nucleon nucleon: interaction
- interaction: nucleon nucleon
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