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Title: A New Approach to Estimating the Probability for β-delayed Neutron Emission

The probability for neutron emission following β decay, Pn, is a crucial property for a wide range of physics and applications including nuclear structure, r-process nucleosynthesis, the control of nuclear reactors, and the post-processing of nuclear fuel. Despite much experimental effort, knowledge of Pn values is still lacking in very neutron-rich nuclei, requiring predictions from either systematics or theoretical models. Traditionally, systematic predictions were made by investigating the Pn value as a function of the decay Q value and the neutron separation energy in the daughter nucleus. A new approach to Pn systematics is presented which incorporates the half-life of the decay and the Q value for β-delayed neutron emission. This prescription correlates the known data better, and thus improves the estimation of Pn values for neutron-rich nuclei. Such an approach can be applied to generate input values for r-process network calculations or in the modeling of advanced fuel cycles.
Authors:
 [1] ; ;  [1] ;  [2] ; ;  [3]
  1. National Nuclear Data Center, Brookhaven National Laboratory, Upton, NY 11973-5000 (United States)
  2. Nuclear Data Section, International Atomic Energy Agency, A-1400 Vienna (Austria)
  3. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario (Canada)
Publication Date:
OSTI Identifier:
22436686
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Data Sheets; Journal Volume: 120; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; BETA-DELAYED NEUTRONS; NEUTRON EMISSION; NEUTRON SEPARATION ENERGY; NEUTRON-RICH ISOTOPES; NUCLEAR FUELS; NUCLEOSYNTHESIS; PROBABILITY; Q-VALUE; R PROCESS