Li 6 + N 15 interaction at Ec.m.=23.1 MeV: Validation of the α+d cluster model of Li 6 Li 6 + N 15 INTERACTION at Ec.m.=23.1 MeV: ... A. T. RUDCHIK et al.

Rudchik A.T. Rudchik A.A. Chepurnov O.O. Rusek K. Keeley N. Kemper K.W. Kliczewski S. Piasecki E. Trzcińska A. Pirnak V.M. Ponkratenko O.A. Strojek I. Koshchy E.I. Siudak R. Sakuta S.B. Ilyin A.P. Stepanenko Y.M. Shyrma Y.O. Uleshchenko V.V. Chercas K.A. Maridi H.M. Burtebayev N.
April 2021 American Physical Society

Physical Review C
2021 #103 Issue 4

An extensive data set for the Li6+N15 system at an energy Ec.m.=23.1 MeV, consisting of elastic and inelastic scattering to excited states of N15 and the 31+, 21+, and 11+ spin-orbit triplet of L=2, T=0 resonances in Li6, was analyzed with a single calculation including the Li6→α+d breakup, excitation of the N15 levels, and the N15(Li6,Li7)N14 one-neutron pickup reaction employing the coupled discretized continuum channel, coupled channel, and coupled reaction channel techniques, respectively. Since the experiment was performed in inverse kinematics, and owing to the specific structure properties of N15, it was possible to measure an angular distribution for population of the 11+ resonance of Li6 for the first time, without the need for time-consuming and complicated coincidence measurements through detection of the scattered N15. A good description of the cross sections for populating all three Li6 resonances was obtained, confirming the validity of the α+d cluster model of Li6. In the methodology adopted the surface absorption was mostly generated by the included couplings, and while the Li6 breakup had the most important influence on the elastic scattering, coupling to the N15 inelastic excitations was also found to have a significant effect, particularly at midrange angles. By contrast, the one-neutron pickup coupling had a negligible effect on the other channels.

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Institute for Nuclear Research, Ukrainian Academy of Sciences, Prospect Nauki 47, Kyiv, 03680, Ukraine
Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, Warsaw, 02-093, Poland
National Centre for Nuclear Research, ul. Andrzeja Sołtana 7, Otwock, 05-400, Poland
Department of Physics, Florida State University, Tallahassee, 32306, FL, United States
H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Kraków, 31-342, Poland
Cyclotron Institute Texas AandM University, College Station, 77843, TX, United States
Russian Research Center Kurchatov Institute, Kurchatov Square 1, Moscow, 123182, Russian Federation
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan

Institute for Nuclear Research
Heavy Ion Laboratory
National Centre for Nuclear Research
Department of Physics
H. Niewodniczański Institute of Nuclear Physics
Cyclotron Institute Texas AandM University
Russian Research Center Kurchatov Institute
Institute of Nuclear Physics

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