Search results for "Angular range"
showing 10 items of 13 documents
Über die verzweigung von polydodecylmethacrylat
1970
Zur Untersuchung der Losungseigenschaften und des Ausmases der Verzweigung von radikalisch gewonnenem Polydodecylmethacrylat wurden Fraktionen von niedrig- und hochumgesetzten Praparaten im Molekulargewichtsbereich von 1,5·105 bis 8·106 auf ihr Molekulargewicht und ihre Knaueldimension hin vermessen. Die Methoden der Lichtstreuung, der Viskosimetrie, der Sedimentation in der Ultrazentrifuge, der Osmometrie und der Gelchromatographie wurden benutzt. Fur die Streulichtmessungen diente ein Eigenbaulichtstreuungsgerat, das wegen seines grosen Winkelmesbereiches eine recht genaue Festlegung der Anfangssteigung der Streukurve und damit des Tragheitsradius ermoglicht. Das Quadrat des Tragheitsradi…
Untersuchungen zu den orientierungs- und dichtefluktuationen in amorphen polymeren mit hilfe der lichtstreuung
1976
Es wurden mit einem Lichtstreuphotometer die Orientierungs- und Dichtefluktuationen in den amorphen Polymeren «Polycarbonat» (Poly(oxycarbonyloxy-1,4-phenylenisopropyliden-1,4-phenylen)) und Polystyrol in Abhangigkeit von der Temperatur untersucht. Ferner fuhrten wir erganzende Messungen an Oligomeren des Polystyrols und an der flussig-kristallinen Verbindung 4-Butyl-N-(p-methoxybenzyliden)anilin (MBBA) in der isotropen Phase durch. Aus der Hohe der depolarisierten Lichtstreuung ergab sich, das eine Orientierungskorrelation, wie sie fur einige Bundelmodelle vorgeschlagen wurde, nicht auftritt. Besonders detaillierte Aussagen konnten fur Polystyrol gemacht werden. Die depolarisierte Lichtstr…
Cluster Formation during Expansion of Hot and Compressed Nuclear Matter Produced in Central Collisions of Au on Au at 250AMeV
1995
Complete distributions of the light and intermediate mass fragments ({ital Z}=1--6) produced within the polar angular range 1{sup {circ}}{le}{Theta}{sub lab}{le}30{sup {circ}} in highly central collisions of 250{ital A} MeV Au+Au are presented. The results of this measurement and a model analysis are used to study the expansion and clustering of the hot and compressed transient state formed in central collisions of such a heavy system. The influence of the initial conditions on the final observables is discussed.
Scaling of the 4He(γ,p)t reaction in the Eγ = 80–160 MeV region
1993
The 4He(γ,p) 3H reaction cross section has been measured with tagged photons of energy 81–158 MeV. Protons were detected over the angular range 55°–125°. The scaling of the data as a function of momentum mismatch has been examined for two reaction models, the modified quasideuteron mechanism and quasifree knockout. Both models show clear scaling behaviour but comparison of the predicted and measured scaling function shapes favours the modified quasideuteron mechanism at momenta up to ≈500 MeV/c.
Die Winkelverteilung im Bereich 30 bis 155� von elastisch an Golddampf gestreuten Elektronen mit Energien zwischen 150 und 1900 eV
1963
The angular distribution of electrons scattered elastically by gold atoms has been investigated over the angular range from 30 to 155° and with electron energies between 150 and 1900 eV. The scattering curves obtained resemble closely the corresponding curves for mercury atoms. The theoretically expected energy dependence of the 90°-scattering is in poor agreement only with the results obtained experimentally in this work.
Elastische Streuung langsamer Elektronen an einem Bi-Atomstrahl
1968
The angular distribution of electrons elastically scattered by bismuth atoms has been investigated in the angular range from 30 to 155° and with electron energies between 5 and 1200 eV. Theoretical data, which are available for energies above 100 eV, are in good agreement with experiment.
The reaction at Eγ = 60 and 80 MeV
1986
Abstract The tagged photon technique has been used to measure the 12C photoproton cross section over the angular range θp = 30°–135° for Eγ = 60 and 80 MeV. Comparison of the results with quasifree knockout and quasideuteron calculations shows that photon interaction with two-nucleon pairs is dominant at least for high excitation energies in the residual nucleus.
Spinpolarisation langsamer Elektronen durch elastische Streuung an Edelgasatomstrahlen
1968
The angular dependence of spin polarisationP(θ) of electrons elastically scattered by noble gas atomic beams is measured in a double-scattering experiment for electron energies between 40 and 150 eV and over an angular range fromθ=30‡ toθ=150‡. Maximum degree of polarisation measured isP=+ 39.5%±2.6% (Xe; 150eV;θ=60‡). The results are compared with the theoretical values ofCoulthard, which agree approximately with the measurements only for Xenon. For all lower atomic numbers the experimental values are higher than the theoretical ones.
Conceptual design and performance study for the first implementation of AGATA at the in-flight RIB facility of GSI
2012
Abstract The main objective of the Advanced GAmma Tracking Array (AGATA) is the investigation of the structure of exotic nuclei at the new generation of RIB facilities. As part of the preparatory phase for FAIR-NUSTAR, AGATA is going to be installed at the FRS fragmentation facility of the GSI centre for an experimental campaign to be performed in 2012 and 2013. Owing to its γ - ray tracking capabilities and the envisaged enhancement in resolving power, a series of in-flight γ - ray spectroscopy experiments are being planned. The present work describes the conceptual design of this first implementation of AGATA at GSI-FRS, and provides information about the expected performance figures. Acc…
Winkelverteilung von elastisch und mit 6,7 eV-Energieverlust an freien Hg-Atomen gestreuten Elektronen
1970
The angular dependence of electrons scattered elastically and inelastically at free mercury atoms have been measured for electron energies between 20 and 300 eV (angular range from 20 to 155°).