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Il Nuovo Cimento A (1965-1970)

, Volume 85, Issue 3, pp 280–291 | Cite as

Continuum shell model calculations and the resonances below the GDR in12C

  • S. Ramavataram
Article

Summary

The excitation functions in the11B(p, n0),11B(p, p1) and11B(p, γ) reaction channels predicted by a continuum shell model calculation are compared to facilitate isospin assignments forJ− resonances in the (19÷22) MeV region of excitation in12C. Model predictions are also tested against differential cross-section data in the particle channels. It is shown that definitive spin, isospin and parity assignments can be made for several dominant resonances reported in the literature. Comparison with recent (e, e′) data analysis not only confirms our model predictions but also demonstrates that level energies are well reproduced within the multiconfiguration shell model only if continuum effects are included.

PACS. 25.10.

Nuclear reactions and scattering involving few-nucleon systems 

Riassunto

Si confrontano le funzioni di eceitazione nei canali di reazione11B(p, n0),11B(p, p1) e11B(p, γ) previste da un calcolo del modello a strati nel continuo per facilitare l'assegnazione di isospin per le risonanzeJ− nella regione da 19 a 22 MeV di eccitazione in12C. Si verificano anche le previsioni del modello rispetto ai dati delle sezioni d'urto differenziali nei canali delle particelle. Si mostra che si possono fare assegnazioni definitive di spin, isospin e parità per parecchie risonanze dominanti riportate nella letteratura. Il confronto con l'analisi di dati recenti (e, e′) non solo confronta le nostre previsioni del modello ma dimostra che le energie dei livelli sono riprodotte abbastanza bene nell'ambito del modello a strati a molte configurazioni solo se si includono effetti nel continuo.

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Copyright information

© Società Italiana di Fisica 1985

Authors and Affiliations

  • S. Ramavataram
    • 1
  1. 1.National Nuclear Data Center Brookhaven National LaboratoryUpton

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