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Threshold effects in nuclear reactions and the line shape of resonances

1978
17 pages
Published in:
  • Nucl.Phys.A 297 (1978) 237-253
  • Published: 1978
DOI:
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Abstract: (Elsevier)
Threshold effects in the cross section of nuclear reactions are investigated in the continuum shell model using the 15 N + n and 16 O + 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 Γ ̃ R (E) influences the line shape of resonances. Threshold effects in the functions Γ ̃ R (E) may lead to a cusp in the cross section instead of a resonance.