MICROSCOPIC CALCULATION OF THE OPTICAL-MODEL POTENTIAL FOR CA-40

被引:8
作者
BONATSOS, D
MUTHER, H
机构
[1] Institut für Theoretische Physik, Universität Tübingen, D-7400 Tübingen
关键词
D O I
10.1016/0375-9474(90)90287-V
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The optical-model potential for 40Ca is derived microscopically from a realistic one-bosonexchange potential and evaluated in momentum space. For the real part of the potential the Brueckner-Hartree-Fock term is considered, while for the imaginary part the lowest order term comes from the 2-particle-1-hole contribution to the self-energy. Attempts are made to approximate the real and imaginary part of this nonlocal potential by appropriate parametrizations for a local potential. As a first step Woods-Saxon potentials are considered for the central parts, while for fitting the spin-orbit splitting derivative Woods-Saxon potentials are used. The resulting parameters are in good agreement with recent determinations from experimental data. The fit of the central parts of the nonlocal potential is improved considerably if the Woods-Saxon ansatz for the local approximation is supplemented by a repulsive term of short range. A similar improvement is also achieved by allowing for an energy-dependent depth of the potential. © 1990.
引用
收藏
页码:55 / 69
页数:15
相关论文
共 26 条
[1]   RELATIVISTIC NUCLEAR-STRUCTURE PHYSICS [J].
ANASTASIO, MR ;
CELENZA, LS ;
PONG, WS ;
SHAKIN, CM .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1983, 100 (06) :327-392
[2]   MICROSCOPIC CALCULATION OF THE OPTICAL-MODEL POTENTIAL FOR O-16 [J].
BONATSOS, D ;
MUTHER, H .
NUCLEAR PHYSICS A, 1989, 496 (01) :23-44
[3]   MICROSCOPIC DESCRIPTION OF NUCLEON-NUCLEUS ELASTIC-SCATTERING [J].
BRIEVA, FA ;
ROOK, JR .
NUCLEAR PHYSICS A, 1978, 307 (03) :493-514
[4]   EXACT TREATMENT OF THE PAULI EXCLUSION OPERATOR IN THE NUCLEAR-MATTER BETHE-GOLDSTONE EQUATION [J].
CHEON, T ;
REDISH, EF .
PHYSICAL REVIEW C, 1989, 39 (02) :331-335
[5]   NONLOCAL POTENTIALS AND THEIR EXACT AND APPROXIMATE LOCAL AND VELOCITY-DEPENDENT EQUIVALENTS [J].
FIEDELDEY, H ;
SOFIANOS, SA .
ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1983, 311 (04) :339-349
[6]   NUCLEAR SATURATION AND SMOOTHNESS OF NUCLEON-NUCLEON POTENTIALS [J].
HAFTEL, MI ;
TABAKIN, F .
NUCLEAR PHYSICS A, 1970, A158 (01) :1-&
[7]   PROTON OPTICAL POTENTIALS AT INTERMEDIATE ENERGIES FROM BRUECKNER THEORY [J].
HAIDER, W ;
ROOK, JR ;
KOBOS, AM .
NUCLEAR PHYSICS A, 1988, 480 (01) :20-28
[8]   THE NEUTRON OPTICAL-POTENTIAL [J].
HODGSON, PE .
REPORTS ON PROGRESS IN PHYSICS, 1984, 47 (06) :613-654
[9]   RELATIVISTIC ONE-BOSON-EXCHANGE POTENTIAL AND 2-NUCLEON DATA [J].
HOLINDE, K ;
ERKELENZ, K ;
ALZETTA, R .
NUCLEAR PHYSICS A, 1972, A194 (01) :161-&
[10]  
HOLINDE K, 1972, NUCL PHYS A, VA198, P598, DOI 10.1016/0375-9474(72)90711-7