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The decompression of cold neutron star matterThe ejection of cold neutron-star matter is examined, and an attempt is made to determine whether the final composition of this matter may be similar to that normally associated with the hot high-neutron-flux r-process. A semiempirical liquid-drop model is used for the nucleus, and the equilibrium composition of the matter is determined by assuming it to be in its absolute ground state at a given density. Physical mechanisms operating during the expansion are analyzed, and the composition of the ejected matter is found as a function of its density during expansion. The results indicate that it is virtually impossible for deuterium to form, that neutrons can be captured only after beta decay increases the atomic numbers of nuclei, and that no free neutrons can escape. It is concluded that neutron-star ejecta can produce heavy neutron-rich nuclei and may produce somewhat heavier nuclei than a standard r-process.
Document ID
19770045172
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lattimer, J. M.
(Texas, University Austin, Tex.; Chicago, University, Chicago, Ill., United States)
Mackie, F.
Ravenhall, D. G.
(Illinois, University Urbana, Ill., United States)
Schramm, D. N.
(Chicago, University Chicago, Ill., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1977
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
77A28024
Funding Number(s)
CONTRACT_GRANT: NSG-7212
CONTRACT_GRANT: NSF AST-74-21216
CONTRACT_GRANT: NSF PHY-75-21590
Distribution Limits
Public
Copyright
Other

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