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101.
T. de Reus J. Reinhardt B. Müller U. Müller G. Soff W. Greiner 《Zeitschrift für Physik A Hadrons and Nuclei》1985,321(4):589-592
We show that emission of high-energy electrons and photons in nuclear collisions at intermediate energies is sensitive to the space-time evolution of the reaction. The electron and photon spectra measure related but complementary quantities connected with the nuclear charge distribution. We show that at 60 MeV/u beam energy production of 50 MeV electrons is predicted to measurable probability. 相似文献
102.
H. J. Wollersheim P. Egelhof H. Emling J. Gerl W. Henning R. Holzmann R. Schmidt R. S. Simon N. Martin G. Eckert Th. W. Elze K. Stelzer R. Kulessa G. Duchene B. Haas J. C. Merdinger J. P. Vivien J. de Boer E. Hauber K. Kaiser P. von Brentano R. Reinhardt R. Wirowski R. Julin C. Fahlander I. Thorslund H. Kluge 《Zeitschrift für Physik A Hadrons and Nuclei》1992,341(2):137-144
Collective properties of206,208Pb have been investigated with gamma-ray spectroscopy using nuclear and electromagnetic excitation by208Pb projectiles. From the measurement of particle-particle- and particle-particle- coincidences a new energy level in208Pb at 5.683 MeV was observed and the data suggest an interpretation as a 2-phonon octupole vibrational state with spin 4+ or 6+. For this state one finds the same dynamical deformation parameter
3 as for the first-excited collective 3– state. The results are compared to predictions of models which consider, in particular, the aspects of the quadrupole interaction and the interaction of the 2-particle pairing vibration with the 2-phonon octupole vibration. For the206Pb+208Pb system at 6.2 MeV/u the nuclear potential could be determined from the measured inelastic cross sections.Dedicated to Prof. Dr. P. Kienle on the occasion of his 60th birthday 相似文献
103.
R. Gvishi P.N. Prasad B.A. Reinhardt J.C. Bhatt 《Journal of Sol-Gel Science and Technology》1997,9(2):157-167
We have investigated the nonlinear optical performance of new UV photostable dyes, didecyl and didecyloxy substitutedpara-polyphenyl heptamers (DDPPH and DDOPPH hereafter, respectively) using the techniques of degenerate four-wave mixing (DFWM)
and optical Kerr gate (OKG). The studies were performed on the dyes dissolved in THF solution and doped in sol-gel processed
composite-glass. The magnitudes and the signs of the real and the imaginary components of the complex third-order optical
susceptibilities were determined by the heterodyned OKG method and compared to the values obtained from concentration dependent
homodyne Kerr gate and DFWM measurements. The observed effective second hyperpolarizability γ values are dependent on the
optical intensity and the pulse width of the pumping source beam. Doping of the dyes in composite-glass allows to increase
the interaction length providing the prospect of using them as building blocks for photonic devices. 相似文献
104.
H. Nölle A. Horn J. Hüve B. Nölle J. Reinhardt J. Schmand H. J. Andrä E. W. Weber 《Zeitschrift für Physik D Atoms, Molecules and Clusters》1994,30(2):227-229
Cooling and optical pumping by a circularly polarized two mode laser is applied to a Na atomic beam in transverse geometry. The low velocity components of the beam are transversly cooled to the Doppler limit temperature of 240 µK and are simultaneously spin polarized for more than 90%. 相似文献
105.
F. -W. Breitbarth H. -J. Tiller R. Reinhardt 《Plasma Chemistry and Plasma Processing》1985,5(4):293-316
For the case of weak feed gas decomposition, where the concentration of CCl4 exceeds those of decomposition and built-up products, the emission of CCl* is shown to originate from dissociative excitation of CCl4. With electron concentration measured independently, the kinetics of CCl4 decomposition has been extracted from the time dependence of the CCl* intensity. Supported by EPR determinations of radical concentrations in rapidly flowing CCl4 and CCl4/O2 afterglows, the primary decomposition reaction is shown to be the electron impact dissociation into CCl3 and Cl. Its rate constant (k
1=4×10–8 cm3s–1) indicates strongly that dissociative electron attachment is the main reaction channel at least at r.f. power densities just above the threshold of a self-maintaining discharge. At extremely low mean electron energies the emission of a continuum is observed, which is tentatively ascribed to the radiative CCl3-Cl recombination. 相似文献
106.
107.
Summary The separation of racemic side-chain fluorinated alkylbenzenes and bromofluorinated analogues by capillary gas chromatography using permethylated , and -cyclodextrins dissolved in polysiloxanes of different polarity as stationary phases is described. The influence of the achiral polysiloxane matrices on the separation of enantiomers is discussed in the light of the results obtained with the different phases. For a part of the tested compounds thermodynamic data are determined which describe the interaction of enantiomers with the stationary phase. The mechanism of separation is discussed on this basis and by comparison with data for structurally similar compounds. 相似文献
108.
Reinhardt Euler 《Mathematical Programming》1982,24(1):269-283
Let (E,I) be an independence system over the finite setE = {e
1, ,e
n
}, whose elements are orderede
1 e
n
. (E,I) is called regular, if the independence of {e
l
, ,e
l
k
},l
1 < <l
k
, implies that of {e
m
l
, ,e
m
k
}, wherem
l
< ··· <m
k
andl
1 m
1, ,l
k
m
k
. (E,I) is called a 2-system, if for anyI I,e E I the setI {e } contains at most 2 distinct circuitsC, C I and the number 2 is minimal with respect to this property. If, in addition, for any two independent setsI andJ the family (C J, C
C
(J, I)), whereC(J, I) denotes {C C:e J I C
{e}}, can be partitioned into 2 subfamilies each of which possesses a transversal, then (E,I) is called a (2, 2)-system. In this paper we characterize regular 2-systems and we show that the classes of regular 2-systems resp. regular (2, 2)-systems are identical. 相似文献
109.
C. Reinhardt 《Fresenius' Journal of Analytical Chemistry》1886,25(1):11-19
Ohne Zusammenfassung 相似文献
110.
Werner Fischer B. Deierling H. Heitsch G. Otto H.-P. Pohlmann K. Reinhardt 《Angewandte Chemie (International ed. in English)》1966,5(1):15-23
The partition equilibria of zirconium and hafnium thiocyanates between water and methyl isobutyl ketone have been studied under various conditions. Since the system shows extremely marked deviations from Nernst's distribution law, the two elements cannot be prepared in a very pure state by a simple multi-stage partition. By the use of suitable additives and a new scheme of material flow, however, a continuous process using 23 mixer settlers has been developed, by means of which ZrO2 containing less than 10 p.p.m. of HfO2 and HfO2 containing only 0.3% of ZrO2 can be obtained from a zirconium-hafnium mixture (hafnium content: 1 to 2%). 相似文献