Accession Number : AD0766407

Title :   Some Effects of Delayed-Neutron Emission on r-Process Abundances.

Descriptive Note : Rept. for Jan-Apr 73,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Blake,J. Bernard ; Schramm,David N.

Report Date : 28 SEP 1973

Pagination or Media Count : 23

Abstract : Some effects on elemental abundances resulting from delayed-neutron emission during the beta decay back to the valley of stability from the r-process nucleosynthetic path are examined. It is found that delayed-neutron emission results in a skewing of the r-process abundance peaks, with a more rapid falloff on the high mass side and a broader low mass side than would otherwise occur. The location of the maximum is essentially unchanged but the peak is flattened. Skewed peaks are indeed observed in the empirical r-process abundances. Furthermore the reduced odd-even abundance variations observed in the r-process peaks can be due, at least in part, to the smoothing effect of delayed-neutron emission. Delayed-neutron emission does not result in an abundance hump in the rare-earth region. (Author)

Descriptors :   (*BETA DECAY, NEUTRONS), FISSION PRODUCTS, NUMERICAL ANALYSIS, RADIOACTIVE ISOTOPES

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE