Investigation of the reaction mechanism by means of polarized proton scattering at 30 Si in the range of Ericson fluctuations
Description
By measuring cross section fluctuations in the area of heavily overlapping resonances (Ericson-fluctuations) one is able to extract nuclear properties like level width and level distance. For the elastic scattering case of polarized spin 1/2-particles at nuclei with zero spin one is able to determine the direct reaction part independently from the model by evaluating the polarized and unpolarized cross sections. For this reason the reaction 30Si(p,p0) and 30Si(p,p1) was measured with polarized protons in the angular range 500 <= THETA <= 1700, ΔTHETA = 100. The bombarding energy was varied between 8.500 MeV and 10.680 MeV with 20 keV steps. A mean value of (18.5 +- 2.9) keV resulted for the coherence width that was in agreement for the measurements with polarized and unpolarized particles. To define a final value of the reaction mechanism in elastic scattering the direct part of reaction was determined for all angles. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Durch Messung von Fluktuationen des Wirkungsquerschnitts im Gebiet stark ueberlappender Resonanzen (Ericson-Fluktuationen) kann man Kerneigenschaften wie Niveaubreite und -abstand extrahieren. Fuer den Fall der elastischen Streuung polarisierter Spin - 1/2 - Teilchen an Kernen mit Spin Null kann durch Auswertung des unpolarisierten und polarisierten Wirkungsquerschnitts der direkte Reaktionsanteil modellunabhaengig bestimmt werden. Deshalb wurde mit polarisierten Protonen die Reaktion 30Si(p,p0) und 30Si(p,p1) im Winkelbereich (500 <= THETA <= 1700, ΔTHETA = 100) gemessen. Die Einschussenergie wurde zwischen 8.500 MeV und 10.680 MeV in 20 keV Schritten variiert. Fuer die Kohaerenzbreite ergab sich ein Mittelwert von (18.5 +- 2.9) keV, der fuer die Messungen mit polarisierten und unpolarisierten Teilchen uebereinstimmt. Zur Festlegung des Reaktionsmechanismus in der elastischen Streuung wurde fuer alle Winkel der direkte Reaktionsanteil bestimmt. (rig.)
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Additional titles
- Original title (German)
- Untersuchung des Reaktionsmechanismus durch Streuung polarisierter Protonen an
Publishing Information
- Imprint Pagination
- 101 p.
- Report number
- INIS-mf--6082
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 11557466
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- COMPOUND-NUCLEUS REACTIONS; CORRELATIONS; DIFFERENTIAL CROSS SECTIONS; DIRECT REACTIONS; ELASTIC SCATTERING; EXCITATION FUNCTIONS; FLUCTUATIONS; MEV RANGE 01-10; POLARIZATION-ASYMMETRY RATIO; POLARIZED BEAMS; PROTON REACTIONS; PROTONS; RESONANCE; SILICON 30; SILICON 30 TARGET
- Descriptors DEC
- BARYON REACTIONS; BARYONS; BEAMS; CATIONS; CHARGED PARTICLES; CROSS SECTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; EVEN-EVEN NUCLEI; FERMIONS; HADRON REACTIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONS; ISOTOPES; LIGHT NUCLEI; MEV RANGE; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS; SCATTERING; SILICON ISOTOPES; STABLE ISOTOPES; TARGETS; VARIATIONS