Comparison of global phenomenological and microscopic optical potentials for nuclear data predictions

Journal Article · Tue Oct 01 00:00:00 EDT 1991 · Nuclear Science and Engineering; (United States)

OSTI ID:5611436

Cai, C ^[1]; Shen, Q; Zhuo, Y ^[2]

---

1. Nakai Univ., Dept. of Physics, Tianjin (CN)
2. Inst. of Atomic Energy, Beijing (CN)

In this paper the chi-square ({chi}{sup 2}) values, which represent the degree of agreement between the calculated total, nonelastic, and differential elastic cross sections and their experimental values, are calculated for seven kinds of optical potentials: the phenomenological optimal optical potential (OOP) for a specific element, the global phenomenological optical potentials given by Becchetti and Greenlees (BGP) and by Varner et al. (CH86) for a large number of target nuclei, and the microscopic optical potentials based on conventional Skyrme force (SII and SIII), generalized Skyrme force (GS2), and modified Skyrme force (SKa). Fourteen natural elements (each containing one to four isotopes) are calculated with 12 to 20 neutron incident energies, which are in the 0.1- to 24-MeV energy region for each element. The calculated average total chi-square values are {bar {chi}}{sub OOP}{sup 2} - 0.309, {bar {chi}}{sub BGP}{sup 2} = 0.807, {bar {chi}}{sub CH86}{sup 2} = 0.684, {bar {chi}}{sub GS2}{sup 2} = 0.600, {bar {chi}}{sub SKa}{sup 2} = 0.646, {bar {chi}}{sub SII}{sup 2} = 2.587, and {bar {chi}}{sub SIII}{sup 2} = 1.368. The conclusion is that the microscopic optical potential based on generalized and modified Skyrme force (GS2 and SKa), which has an analytical formalism without any free parameters, is useful in nuclear data calculation and evaluation.

• OSTI ID: 5611436
• Journal Information: Nuclear Science and Engineering; (United States), Vol. 109:2; ISSN 0029-5639
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
NUCLEAR REACTIONS
SKYRME POTENTIAL
COMPARATIVE EVALUATIONS
DATA
ELASTIC SCATTERING
INELASTIC SCATTERING
KEV RANGE 100-1000
MEV RANGE 01-10
MEV RANGE 10-100
MODIFICATIONS
NEUTRONS
NUCLEI
OPTICAL MODELS
OPTIMIZATION
TARGETS
TOTAL CROSS SECTIONS
BARYONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FERMIONS
HADRONS
INFORMATION
KEV RANGE
MEV RANGE
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
POTENTIALS
SCATTERING
665100* - Nuclear Techniques in Condensed Matter Physics - (1992-)