Microscopic three-cluster study of 21-nucleon systems

Journal Article · Tue Nov 30 23:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.2746· OSTI ID:5800761

Descouvemont, P ^[1]

---

1. Physique Nucleaire Theorique et Physique Mathematique, Universite Libre de Bruxelles, Campus Plaine, C.P. 229, B1050 Bruxelles (Belgium)

The three-cluster generator coordinate method is applied to different properties of [ital T]=1/2 21-nucleon systems. The [sup 21]Ne and [sup 21]Na nuclei are described by mixing of different [sup 16]O+[alpha]+[ital n] or [sup 16]O+[alpha]+[ital p] configurations. A fair agreement with experiment is found for energy spectra and for electromagnetic transition probabilities. We present [sup 17]O+[alpha] and [sup 20]Ne+[ital n] elastic phase shifts, as well as [sup 17]O([alpha],[gamma])[sup 21]Ne and [sup 17]O([alpha],[ital n])[sup 20]Ne low-energy cross sections. The ratio between the corresponding reaction rates is predicted 5 orders of magnitude lower than values currently used in astrophysics. We also compare [sup 20]Ne([ital p],[ital p][prime])[sup 20]Ne(2[sup +]), [sup 20]Ne([ital p],[alpha])[sup 17]F, and [sup 20]Ne ([ital p],[gamma])[sup 21]Na theoretical cross sections with experimental data. For the proton capture reaction, important in stellar evolution, we do not suggest significant differences with the existing reaction rate.

• OSTI ID: 5800761
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663120* -- Nuclear Structure Models & Methods-- (1992-)
663530 -- Nuclear Mass Ranges-- A=20-38-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA REACTIONS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
CROSS SECTIONS
DATA
ENERGY SPECTRA
EVEN-ODD NUCLEI
HADRON REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NEON 20 TARGET
NEON 21
NEON ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
OXYGEN 17 TARGET
PROTON REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SODIUM 21
SODIUM ISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS
THEORETICAL DATA