------------------------------------------------------------ 


   RECORD NO.:  1286365 INSPEC Abstract No: A79006459
       AUTHOR:  Robson, D.
  CORP SOURCE:  Sektion Phys., Univ. Munchen, Garching, West Germany
        TITLE:  Many-body interactions from quark exchanges and the 
                tetrahedral crystal structure of nuclei
       SOURCE:  Nuclear Physics A, vol.A308, no.3, p. 381-428
         ISSN:  0375-9474
        CODEN:  NUPABL
PLACE OF PUBL:  Netherlands
     LANGUAGE:  English
         YEAR:  9 Oct. 1978
    TREATMENT:  T Theoretical or Mathematical
     ABSTRACT:  A new approach to nuclear interactions has been investigated 
                on the basis of a coloured quark exchange model. The model 
                is consistent with quantum chromodynamics and requires the 
                existence of three-body and four-body interactions between 
                nucleons, but only in states with antisymmetric SU(4) 
                symmetry. This approach provides a method for calculating 
                many properties of nuclei, gives many qualitative features 
                of the nucleon-nucleon interaction, automatically yields 
                saturation, but requires the alpha -particle to have 
                tetrahedral symmetry. Even-even nuclei up to A=24 have been 
                considered with particular emphasis on /sup 12/C and /sup 
                16/O. Remarkable agreement with experiment has been achieved 
                not only for ground state properties but also for excited 
                states. A successful synthesis of rotations, vibrations, 
                cluster states, and single-particle motion appears to have 
                been attained. Unusually accurate values of the total 
                binding energies have been predicted for even-even nuclei. 
                Qualitative discussions of the possible ramifications of the 
                present theory for heavier nuclei are also included 
                (49 Refs.)
  DESCRIPTORS:  colour model; nuclear binding energy; nuclear cluster model; 
                nuclear collective states and giant resonances; nuclear 
                forces; nuclei with mass number 6 to 19
  IDENTIFIERS:  quark exchanges; tetrahedral crystal structure; coloured 
                quark exchange model; antisymmetric SU(4) symmetry; /sup 
                12/C; /sup 16/O; ground state properties; excited states; 
                cluster states; total binding energies; three body 
                interactions; four body interactions; even even nuclei; 
                single particle motion
  CLASS CODES:  A1235C (General properties of quantum chromodynamics 
                (dynamics, confinement, etc.)); A1235 (Composite models of 
                particles); A2110D (Nuclear binding energy and masses); 
                A2110P (Single particle structure in nuclear levels); 
                A2110R (Collective structure in nuclear levels); A2130 
                (Nuclear forces); A2160G (Nuclear cluster models); A2720 
                (Properties of nuclei with 6 <or= A <or= 19)
 
------------------------------------------------------------