H. Mommsen
University of Bonn
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Featured researches published by H. Mommsen.
Nuclear Physics | 1972
P. David; J. Debrus; Ung Kim; Gerfried J. Kumbartzki; H. Mommsen; W. Soyez; K.-H. Speidel; Gotthard Stein
Abstract Bremsstrahlung induced photofission of 197Au and 238U has been measured for energies Emaxγ = 0.8 to 2.2 GeV using catcher foil techniques. The mass distributions of the fission fragments of uranium were measured as a function of the maximum bremsstrahlung energy. The peak-to-valley and forward-backward ratios have been determined for 238U.
Nuclear Physics | 1971
M. Betigeri; P. David; J. Debrus; H. Mommsen; A. Riccato
Abstract Angular distributions for α-particles and deuterons from the reactions 66Zn(3He, d)67Ga and 66Zn(3He, α)65Zn have been measured at an incident 3He energy of 18 MeV, using a broad-range magnetic spectrograph. DWBA analysis gives information about the 66Zn ground state configuration as well as the neutron hole states in 65Zn and the single-particle proton states in 67Ga. p]Analogue states in 65Zn corresponding to low-lying levels in 65Cu and in 67Ga corresponding to low-lying levels in 67Zn have been identified.
Zeitschrift f�r Physik A: Atoms and Nuclei | 1976
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
Physics Letters B | 1979
S. Hartwig; F.H. Heimlich; G. Huber; E. Rössle; J. Bleckwenn; M. Köbberling; J. Moritz; K.H. Schmidt; D. Wegener; D. Zeller; P. David; H. Mommsen
Nuclear Physics | 1972
P. David; J. Debrus; H. Mommsen; A. Riccato
E_{4_{He} } = 50 MeV
Nuclear Physics | 1974
P. David; J. Debrus; F. Lübke; H. Mommsen; R. Schoenmackers; Gotthard Stein
Nuclear Physics | 1976
Neos Mohammed Bachschi; P. David; J. Debrus; F. Lübke; H. Mommsen; R. Schoenmackers; G.G. Jonsson; K. Lindgren
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
P. David; J. Debrus; F. Lübke; H. Mommsen; E. Schmitt; R. Schoenmackers; H. Simons
Abstract The ratio R = σ+/σ− of the cross sections for inelastic and electron scattering on 12C and 27Al has been measured for four momentum transfers 0.08 (GeV/c)2 ⩽q2 ⩽0.45 (GeV/c)2 of the virtual photon and invariant masses 0.95 GeV ⩽ W ⩽ 3.3GeV of the hadronic system. The mean value of the ratio is R = (1.005 ± 0.027). No q2, respectively, W dependence of the ratio is observed.
Nuclear Physics | 1976
F.H. Heimlich; G. Huber; E. Rössle; F. David; H. Mommsen; D. Wegener
Abstract The elastic scattering of α-particles on 10 B has been measured in the energy interval between 5 and 30 MeV. At forward angles a diffraction pattern is observed in the energy range from 12 to 30 MeV, while at backward angles a strong rise of the cross section is seen. The diffraction pattern is interpreted in a Regge-pole diffraction model. The measured behaviour of the cross section at backward angles may be attributed to l -poles in the partial-wave scattering amplitude corresponding to a partial-wave resonance or to angular momentum mismatch between the elastic and absorption channels.
Physics Letters B | 1976
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.
