Published February 1977 | Version v1
Journal article Metadata-only

Investigation of high spin states in 23Na and 23Mg and the 12C+12C resonance at E = 19.3 MeV (c.m.)

Creators

  • 1. Muenchen Univ. (Germany, F.R.). Sektion Physik
  • 2. Technische Univ. Muenchen, Garching (Germany, F.R.). Physik-Department

Description

The resonance in the 12C+12C system at E c.m. = 19.3 MeV has been studied in the neutron and proton decay channels. From (p,γ), (n,p) and (n,γ) coincidence measurements high spin states could be localized in A = 23 nuclei, in 23Mg up to possibly 21/2+. These states were resonantly populated. The present data favor Jπ = 17/2+ for the 9.61 MeV state in 23Mg and therefore also for the probable parent state at 9.81 MeV in 23Na. A Jπ = 12+ assignment to the resonance is supported and evidence was found that the resonant exitation of the lowest 15/2+ and 17/2+ states in mass 23 nuclei is caused by a change of the intrinsic structure of the Yrast levels around Jπ = 15/2+ towards larger deformation. (orig./BJ)

Abstract (German)

Die Resonanz bei E c.m. = 19,3 MeV im System 12C+12C wurde in den Neutron- und Proton-Zerfallskanaelen untersucht. Aus (p,γ), (n,p) und (n,γ) Koinzidenzmessungen konnten Hoch-Spin-Zustaende in A = 23-Kernen in 23Mg bis zu moeglicherweise 21/2+ lokalisiert werden. Die Zustaende waren resonant bevoelkert. Die vorliegenden Daten sprechen fuer Jπ = 17/2+ fuer den Zustand bei 9,61 MeV in 23Mg und damit auch fuer den wahrscheinlichen Ausgangszustand bei 9,81 MeV in 23Na. Eine Zuordnung von Jπ = 12+ fuer die Resonanz wird unterstuetzt, und es fanden sich Anzeichen dafuer, dass die Resonanzanregung der tiefstliegenden 15/2+- und 17/2+-Zustaende in Kernen der Masse 23 durch eine staerkere Deformation in der intrinsischen Struktur der Yrastniveaus um Jπ = 15/2+ ausgeloest wird. (orig./BJ)

Additional details

Identifiers

DOI
10.1007/bf01434357;

Publishing Information

Journal Title
Zeitschrift f�r Physik A Atoms and Nuclei
Journal Volume
280
Journal Issue
3
Series
Z. Phys., A.
Journal Page Range
287-307
ISSN
0340-2193

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
8314707
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
CARBON 12 REACTIONS; CARBON 12 TARGET; COINCIDENCE SPECTROMETRY; DIFFERENTIAL CROSS SECTIONS; EXCITATION FUNCTIONS; GAMMA SPECTRA; HIGH SPIN STATES; INTERMEDIATE RESONANCE; MAGNESIUM 23; MEV RANGE 10-100; NEON 20; NEUTRON SPECTRA; NEUTRONS; PROTON SPECTRA; PROTONS; SODIUM 22; SODIUM 23; SPIN; TIME-OF-FLIGHT METHOD; YRAST STATES
Descriptors DEC
ANGULAR MOMENTUM; BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CATIONS; CHARGED PARTICLES; COINCIDENCE METHODS; COUNTING TECHNIQUES; CROSS SECTIONS; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FERMIONS; HADRONS; HEAVY ION REACTIONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONS; ISOTOPES; LIGHT NUCLEI; MAGNESIUM ISOTOPES; MEV RANGE; NEON ISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; PARTICLE PROPERTIES; RADIOISOTOPES; RESONANCE; SECONDS LIVING RADIOISOTOPES; SODIUM ISOTOPES; SPECTRA; STABLE ISOTOPES; TARGETS; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
20 figs.; 3 tabs.; 28 refs.; Updated automatically by Metadata and Full-Text Enrichment Agent