Conrad Deberth

retired (1998)

The K-shell ionisation induced by 7-15 MeV proton bombardment on thin targets of Ag, Gd, Yb, Ta, Au, Pb and Th has been measured. The data are corrected for the contribution of the 'nuclear satellites' produced by internal conversion in the residual nuclei from (p,xn) reactions. The plane-wave Born approximation (PWBA) explains the data only up to...

Reports the K-shell ionisation cross sections for the reaction products from the 7-15 MeV proton bombardment of the following targets (with atomic number Z): 160Gd, 171,172,173,174Yb, 181Ta, 102Os, 197Au, 208Pb and 232Th. The results are interpreted within the assumption that the vacancy production in the K shell of the Z+1 atom is due to the inter...

Excitation functions of the40Ca(p,p 2) triple angular correlations have been measured in the region of an intermediate structure centered atE p=6.25 MeV, for 12 pairs of proton and gamma detector positions. The angular correlations are consistent with the spin 5/2 assigned for these resonances and have established thep 1/2 partial wave as the main...

Excitation functions of the elastic proton scattering by64Ni were measured in the energy rangeEp=5.0–6.2 MeV at 90°, 125° and 141° and in the energy intervals 5.00–5.25 MeV and 5.85–6.20 MeV at 110° and 160°. At 90° the excitation function of the inelastic proton scattering leading to the 2+(1.34 MeV) state in64Ni was measured too. Out of the ten r...

The processing of experimental data, coming from quantitative gamma-ray spectrometry, is studied and a definite application to the activity estimation of a Sr-85 dilute sample is made. A comparison between the two methods - the spectrometric one and the 4 pi beta - gamma coincidence one - is made as well.

The corrections of the experimental results obtained by using the 4 pi beta-gamma coincidence method for the standardization of radioactive sources and solutions are presented here. Three computer programs entitled SAHARA 1, SAHARA 2 and SAHARA 3 were written to carry out these corrections, together with the specific activity calculation of a solut...

As it was shown in ref.1–4), the polarization of the inelastically scattered protons on an IAR contains an appreciable contribution from the channel — channel correlations (CCC) betweenthe fluctuating parts of the S-matrix elements. While a complete account of the corelations induced by the doorway — state mechanism is still missing, several approx...

Analytical expressions for the expansion coefficients of the unbound ; solution of the Schrodinger equation in terms of harmonic oscillator wave ; functions multiplied by a Gauss one are given. Numerical convergence of the ; expansion coefficients for the cases of plane and coulomb waves is studied. ; (auth);

The cross section for the 59Co(γ, Σn) reaction has been measured from threshold to 22 MeV with a small energy bin (≈ 100 keV). Marked structure was observed in the least- structure solution for the photoneutron production cross section. The integrated cross section was found to be 598.7 ± 0.9 MeV · mb. Good agreement is found with the predictions o...

The cross section for the C12 (, n) C11 reaction has been measured from threshold to 25-MeV with a small energy bin (100 keV). The giant resonance was resolved into a very well defined triplet structure. It seems that the shape of the C12 (, n) C11 cross section is influenced by the dipole-quadrupole coupling.