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Spectroscopic information from nuclear reactions: theory
Springer Science and Business Media LLC - Tập 288 - Trang 211-217 - 1978
T. Fliessbach
We consider the transition matrix element for the removal of anα-particle or a nucleon from a nucleus. Our simple model yields, in two limiting cases, different reduced amplitudes for the bound state functions of the removed particle. We shall call these amplitudes the conventional,G conv, and the new,G new, respectively. The transition between these limits is contained in the model. The parameter...... hiện toàn bộ
Statistical multistep direct and compound processes below 30 MeV for 93-Nb
Springer Science and Business Media LLC - Tập 329 - Trang 331-339 - 1988
H. Kalka, D. Seeliger, F. A. Zhivopistsev
A simple model for SMC- and SMD-processes including quasiparticle and phonon excitations is presented. Emission spectra and angular distributions are calculated without free parameters for 93-Nb (n, n′), (n, p) and incidence energies between 5 and 26 MeV.
Giant polaritons and selfinduced transparency of Frenkel-excitons
Springer Science and Business Media LLC - Tập 258 - Trang 231-241 - 1973
H. Haken, A. Schenzle
We show theoretically that Frenkel excitons may show the effect of selfinduced transparency. Furtheron a formula for polariton-dispersion at high field intensities is given. Our analysis is based on Heisenberg equations of motion for the creation operators of Frenkel excitons and the quantized field and takes fully into account the nonlinearities in the system.
β +-endpoint measurements near100Sn and146Gd
Springer Science and Business Media LLC - Tập 340 - Trang 363-370 - 1991
H. Keller, R. Kirchner, O. Klepper, E. Roeckl, D. Schardt, R. S. Simon, P. Kleinheinz, R. Menegazzo, C. F. Liang, P. Paris, K. Rykaczewski, J. Żylicz
With a summation-free β+-endpoint spectrometer the β+-decay energies of104Sn,147Tb,148, 149Dy,149Ho,150Er, and151Tm were remeasured with improved accuracy. Combined with known proton and alpha decay energies, the resulting QEC values lead to atomic masses of very neutron-deficient isotopes including nuclei beyond the proton drip-line such as109I and113Cs. Furthermore, the Gamow-Tellerβ-strength of...... hiện toàn bộ
A nonperturbative solution to the Dyson-Schwinger equations of QCD
Springer Science and Business Media LLC - Tập 336 - Trang 423-433 - 1990
U. Häbel, R. Könning, H. -G. Reusch, M. Stingl, S. Wigard
This is the first of two papers in which we discuss a nonperturbatively modified solution to the Euclidean Dyson-Schwinger equations for the 7 superficially divergent proper verticesΓ of QCD. It takes the formΣ n g 2n Γ( n ) where eachΓ( n ) approaches its perturbative form at large momenta. At lower momenta, it differs from that ...... hiện toàn bộ
The representation of bound state wavefunctions by spherical Hankel functions
Springer Science and Business Media LLC - Tập 275 - Trang 283-287 - 1975
Q. K. K. Liu, P. J. A. Buttle
The representation of a nucleon bound state by a single Hankel function is generalised such that the bound state is expanded as a linear combination of Hankel functions of the samel-value. The singularity at the origin due to the use of Hankel functions is removed. The arguments and coefficients of the expansion are determined by a variational method.
Physikalische Vorgänge bei elektrischen Drahtexplosionen
Springer Science and Business Media LLC - Tập 150 - Trang 162-171 - 1958
Erwin David
Ein typisches Beispiel einer mittelstarken Drahtexplosion wird zwecks Klarstellung der verschiedenen, dabei nacheinander ablaufenden physikalischen Vorgänge durchgerechnet. — Der Strom von einigen kA heizt in reichlich 10−7 sec das Material des Drahtes auf fast 10000° auf. Trägheitskräfte, anfangs unterstützt durch magnetische Kräfte, halten es dabei nahezu an Ort und Stelle. Der Druck steigt in d...... hiện toàn bộ
Multiple positron structures observed from U-U collisions at 5.6 MeV/u and 5.9 MeV/u
Springer Science and Business Media LLC - Tập 326 - Trang 235-236 - 1987
H. Tsertos, F. Bosch, P. Kienle, W. Koenig, C. Kozhuharov, E. Berdermann, S. Huchler, W. Wagner
High resolution positron spectroscopy in U-U collisions at bombarding energies of 5.6 MeV/u, the lowest energy studied until now as well as of 5.9 MeV/u, reveals similar multiple structures between 220 keV and 385 keV superimposed on the induced and nuclear continua.
Messungen der Eindringtiefen von Ionen in LiF-, ZnS- und CsJ-Aufdampfschichten
Springer Science and Business Media LLC - Tập 230 - Trang 435-442 - 1970
F. Fehsenfeld, A. Scharmann
The penetration depths of H+-, He+-, Ne+-, Ar+- and Kr+-ions in the energy range from 5 to 60 keV in LiF, ZnS and CsJ evaporation layers have been measured. From these measurements the range distributions could be derived.
Angular dependence of the polarization of the recoil proton from the reaction γp→π0 p in the region of the second resonance
Springer Science and Business Media LLC - Tập 277 - Trang 311-316 - 1976
P. Blüm, P. Brinckmann, R. Brockmann, P. Lütter, W. Mohr, R. Sauerwein
The polarization of the recoil proton from the reactionγp→π 0 p has been measured for photon energies between 600 and 1,200 MeV and pion c.m. angles between 90° and 150°.
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