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Featured researches published by F. Lübke.


Zeitschrift f�r Physik A: Atoms and Nuclei | 1976

Elastic and inelastic4He-scattering on208Pb,232Th and234, 236, 238U

P. David; J. Debrus; H. Essen; F. Lübke; H. Mommsen; R. Schoenmackers; W. Soyez; H. V. v. Geramb; E. F. Hefter

AbstractThe angular distributions of the elastic4He-scattering on208Pb and the elastic and inelastic4He-scattering on232Th and234,236,238U at


Nuclear Physics | 1974

Bremsstrahlung induced nuclear reactions with Eγmax = 450 MeV

P. David; J. Debrus; F. Lübke; H. Mommsen; R. Schoenmackers; Gotthard Stein


Nuclear Physics | 1976

Photonuclear reactions in 45Sc and natCu induced by 2 GeV bremsstrahlung

Neos Mohammed Bachschi; P. David; J. Debrus; F. Lübke; H. Mommsen; R. Schoenmackers; G.G. Jonsson; K. Lindgren

E_{4_{He} } = 50 MeV


Physics Letters B | 1976

Fission of 238U following inelastic α-particle scattering at bombarding energy Eα = 50 MeV☆

P. David; J. Debrus; F. Lübke; H. Mommsen; E. Schmitt; R. Schoenmackers; H. Simons


European Physical Journal A | 1976

Elastic scattering of α-particles on10B forEα = 5−50 MeV

F. Zu Bentheim; P. David; J. Debrus; F. Hinterberger; Robert G. Jahn; F. Lübke; H. Mommsen; R. Schoenmackers; B. Schuller

were measured between 20° and 60°. The4He-particles were detected with a position sensitive detector in the focal plane of a split-pole spectrograph. The aim was to get data to determine the deformation parameters of the equilibrium states by coupled channels calculations.


Physics Letters B | 1976

Total kinetic energies and mass yield distributions of 252Cf fission fragments

P. David; J. Debrus; F. Lübke; H. Mommsen; R. Schoenmackers

Abstract The target nuclei 27Al, 40, 44Ca, 51V, 59Co, 93Nb, natAg, 181Ta and 197Au were irradiated with bremsstrahlung of Eγmax = 450 MeV. Protons, tritons, 3He and 4He particles were detected on-line with an identification system using surface barrier detectors. Energy spectra, yields and angular distributions are given. The energy spectra are compared with calculated spectra from the compound nucleus model.


Physics Letters B | 1978

The fission processes 236U(α, α′f) at Eα = 50 MeV and 235U(d, pf) at Ed = 23 MeV and the total kinetic energy release in fission of excited nuclei

P. David; J. Debrus; F. Lübke; R. Schoenmackers; J. Schulze

Abstract Yields and isomeric yield ratios of nuclei produced in the irradiation of 45 Sc and nat Cu with bremsstrahlung of E γ max = 2 GeV have been measured by the activation method. The experimental yields are compared to predictions with a Rudstam formula modified to photonuclear reactions.


Archive | 1977

Energiespektren leichter Ionen, die von Kernen bei der Bestrahlung mit γ-Quanten emittiert werden

P. David; Neos Mohammed Bachschi; J. Debrus; Ung Kim; Gerfried J. Kumbartzki; F. Lübke; Theo Mayer-Kuckuk; H. Mommsen; R. Schoenmackers; Karl Heinz Speidel; Gotthard Stein

Abstract Mass and energy distributions of 238 U fragments following fission induced by inelastic scattering of α-particles were obtained in a triple coincidence experiment. The total kinetic energy (TKE) of the fragments is observed to decrease with excitation energy.


Archive | 1977

Spaltung und Spallation mit Bremsstrahlung

P. David; Neos Mohammed Bachschi; J. Debrus; Ung Kim; Gerfried J. Kumbartzki; F. Lübke; Theo Mayer-Kuckuk; H. Mommsen; R. Schoenmackers; Karl Heinz Speidel; Gotthard Stein

Experimental data of the elastic scattering ofα-particles on10B forEα = 30−50.6 MeV are presented. They are analysed together with the data of a previous measurement forEα = 5−30 MeV in the frame of the optical model including spin-orbit coupling. The interaction radii of theα-10B-systems are determined with the Inopin-Ericson model forEα = 5−50 MeV. The mean free path ofα-particles in10B is calculated.


Archive | 1977

Vorwärts-Rückwärts-Verhältnisse

P. David; Neos Mohammed Bachschi; J. Debrus; Ung Kim; Gerfried J. Kumbartzki; F. Lübke; Theo Mayer-Kuckuk; H. Mommsen; R. Schoenmackers; Karl Heinz Speidel; Gotthard Stein

Abstract The variation in the mass yield distribution of the spontaneous fission of 252 Cf as a function of the total kinetic energy (TKE) of the two fragments is investigated. With increasing TKE the peaks of the mass yield distributions become narrower.

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