Elsevier

Nuclear Physics A

Volume 297, Issue 2, 13 March 1978, Pages 237-253
Nuclear Physics A

Threshold effects in nuclear reactions and the line shape of resonances

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Abstract

Threshold effects in the cross section of nuclear reactions are investigated in the continuum shell model using the 15N + n and 16O + γ reactions as examples. The level density near particle emission thresholds is almost not enlarged as a threshold effect. Thresholds for particle emission have also almost no influence on the correlation of the resonance levels via the continuum or on their decoupling. The function Γ̃R(E) influences the line shape of resonances. Threshold effects in the functions Γ̃R(E) may lead to a cusp in the cross section instead of a resonance.

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