Updated mass predictions from the Garvey--Kelson mass relations. [Tables]
''Neutron-rich Nuclides'' describes the procedures for estimating masses of neutron-rich nuclei from the transverse Garvey-Kelson mass relation. This relation represents a homogeneous partial difference equation. The most general solutions were subjected to a chi/sup 2/-minimization procedure (boundary condition) based on the new atomic mass adjustment of Wapstra and Bos. The resulting solution can be viewed as a many-parameter mass equation with about 500 parameters. About 5000 mass values were calculated for nuclei with 2 less than or equal to Z less than or equal to 100, 4 less than or equal to N less than or equal to 156, and N greater than Z (or N = Z = even). The standard deviation between calculated and experimental mass-excess values is sigma/sub m/ = 118 keV. ''Proton-rich Nuclides'' describes the procedure for estimating masses of proton-rich nuclei with T greater than or equal to 1 based on the charge-symmetric mass relation of Kelson and Garvey. Use is made of the experimental Coulomb energy differences between T = /sup 1///sub 2/ mirror nuclei (A less than or equal to 55) together with a few estimated values (57 less than or equal to A less than or equal to 71). Mass values were calculated for about 120 nuclei with 1 less than or equal to T less than or equal to /sup 5///sub 2/ and A less than or equal to 70. The standard deviation between calculated and experimental mass-excess values is sigma/sub m/ approximately 100 keV.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- OSTI ID:
- 7335236
- Journal Information:
- At. Data Nucl. Data Tables; (United States), Vol. 17:5-6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mass predictions, partial difference equations and higher-order isospin effects
Mass predictions by modified ensemble averaging