Implications of the sup 14 C(. alpha. ,. gamma. ) sup 18 O reaction for nonstandard big bang nucleosynthesis

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.R2548· OSTI ID:7105813

Gai, M ^[1]

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1. A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 (United States)

The thermonuclear burning rates for the {sup 14}C({alpha},{gamma}){sup 18}O radiative capture reaction are calculated at temperatures (0.3{lt}{ital T}{lt}10 GK) of relevance to the early universe. These rates are particularly important for estimating the formation of heavy elements in an inhomogeneous big bang nucleosynthesis, proposed by Applegate, Hogan, and Scherrer (that would suggest the quark-gluon to hadron phase transition is first order). We investigate the effect of a possible new broad ({Gamma}{approx}0.45 MeV) 1{sup {minus}} state, at approximately 9.0 MeV in {sup 18}O as would be deduced from the Yale-Michigan State University measurement of the beta-delayed alpha-particle emission of {sup 18}N and suggested by the Notre Dame-Caltech measurement of the nonresonant {sup 14}C({alpha},{gamma}){sup 18}O cross section. The gamma widths of the proposed broad state is estimated using the Alhassid, Gai, and Bertsch sum rule, and an experimental study is proposed.

• DOE Contract Number: FG02-91ER40609
• OSTI ID: 7105813
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663440* -- D-
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& He-induced Reactions & Scattering-- (1992-)
663520 -- Nuclear Mass Ranges-- A=6-19-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
CAPTURE
CARBON 14 TARGET
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
EVEN-EVEN NUCLEI
GAMMA SPECTROSCOPY
ISOTOPES
LIGHT NUCLEI
LINE WIDTHS
MATTER
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
OXYGEN 18
OXYGEN ISOTOPES
PHASE TRANSFORMATIONS
QUARK MATTER
SPECTROSCOPY
STABLE ISOTOPES
SYNTHESIS
TARGETS
THERMONUCLEAR REACTIONS