Published October 1975 | Version v1
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Isospin-forbidden electroexcitation of the 1-, T = 0 state at 7.12 MeV in 16O at low momentum transfers

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Description

The isospin-forbidden electroexcitation of the 1-, T = 0 state at 7.12 MeV in 16O has been studied for momentum transfers q = 0.22 - 0.49 fm-1. The form factor at these momentum transfers is determined by the sum of the isospin T = 0 part and a T = 1 contribution. A single particle-hole harmonic oscillator shell model calculation reproduces the q-dependence of the measured form factor which shows that the isovector contribution interferes destructively with the isoscalar part and has a strength of about 2% of the T = 0 amplitude. (orig.)

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MF available from INIS under the Report Number.

Abstract (German)

Die isospin-verbotene Elektroanregung des 1-, T = 0 Zustandes bei 7,12 MeV in 16O wurde auf den Impulsuebertrag q = 0,22 - 0,49 fm-1 untersucht. Der Formfaktor bei diesem Uebertrag wurde durch die Summe des isospin T = 0 Anteils und einer T = 1 Beimischung bestimmt. Eine Einteilchen-Lochrechnung im harmonischen Oszillator Schalenmodell gibt die q-Abhaengigkeit der gemessenen Formfaktoren wieder, was zeigt, dass die Isovektor-Beimischung mit dem isoskalaren Anteil destruktiv interferiert und eine Staerke von etwa 2% der T = 0 Amplitude hat. (orig./WL)

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Additional details

Publishing Information

Imprint Pagination
10 p.
Report number
IKDA--75/26

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7262386
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
COULOMB EXCITATION; ELECTRON BEAMS; ELECTRON REACTIONS; ELECTRONS; ENERGY-LEVEL TRANSITIONS; EXCITED STATES; FORM FACTORS; INELASTIC SCATTERING; ISOSPIN; OXYGEN 16; OXYGEN 16 TARGET; PARTICLE-HOLE MODEL; SHELL MODELS
Descriptors DEC
BEAMS; ELEMENTARY PARTICLES; ENERGY LEVELS; EVEN-EVEN NUCLEI; EXCITATION; FERMIONS; ISOTOPES; LEPTON BEAMS; LEPTON REACTIONS; LEPTONS; LIGHT NUCLEI; MATHEMATICAL MODELS; NUCLEAR MODELS; NUCLEAR REACTIONS; NUCLEI; OXYGEN ISOTOPES; PARTICLE BEAMS; PARTICLE PROPERTIES; SCATTERING; STABLE ISOTOPES; TARGETS

Optional Information

Notes
2 figs.; 15 refs.