Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles: DFG German National Licenses  (17)
  • 1990-1994  (4)
  • 1980-1984  (5)
  • 1975-1979  (8)
Source
  • Articles: DFG German National Licenses  (17)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Nuclear matter sizes and isoscalar octupole transition rates of204,206,208Pb from 104 MeV α-particle scattering (1976)
    Springer
    The European physical journal 279 (1976), S. 55-68 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Differential cross sections for elastic and inelastic scattering of 104 MeVα-particles from204,206,208Pb were measured with high angular accuracy. The experimental results were analysed on the basis of a semimicroscopic folding model in order to determine the matter distributions at the nuclear surface and the transition densities. Using phenomenological parametrizations of the densities the analyses of elastic scattering yield rms radii of 〈r 2〉1/2=5.55±0.06 (204Pb), 5.57±0.06 (206Pb), 5.63±0.05 (208Pb) fm. Various sensitivities affecting the results were studied. From the inelastic cross sections for the 3 1 − -states octupole transition probabilities and transition radii were derived by using different methods proposed in literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01409092
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    104 MeV alpha particle and 156 MeV6Li scattering and the validity of refined folding model approaches for light complex projectile scattering (1978)
    Springer
    The European physical journal 288 (1978), S. 139-152 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The real parts of the optical model potentials for 104 MeV alpha-particle and 156 MeV6Li ion scattering from40, 48Ca are calculated in terms of folding model approaches. The validity of different procedures is tested by comparing the differential cross section predictions with experimental data measured with high angular accuracy. It is found that a refined folding potential accounting for density dependence of an effective nucleon-nucleon interaction is appropriate for alpha particle scattering without any parameter adjustment. However, for6Li ion scattering renormalization of the depth of the real potential is necessary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408643
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Laserspectroscopic studies of collective properties of neutron deficient Ba Nuclei (1979)
    Springer
    The European physical journal 291 (1979), S. 219-230 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Isotope shifts and hyperfine structure of the BaI resonance-line (λ=553.6 nm) have been measured by dye laser induced resonance fluorescence on an atomic beam for135m, 129g, 129m, 126Ba thus extending previous high resolution measurements of neutron deficient Ba nuclides (N〈82). The experimental results, now available for 16Ba isotopes and isomers withA=140−126, are used to deduce differences of rms charge radii, magnetic dipole and electric quadrupole moments. While the groundstates display a pronounced odd-even staggering the h 11/2− isomers135mBa and133mBa show a decreased staggering. Conspicuously the isomer shift of theg 7/2+ isomer129m Ba proves to be negative. The nuclear structure information is discussed in the context of gammaspectroscopic studies of transitional nuclei with 50〈N,Z〈82 and on the basis of a quasi-particle-plus-triaxial rotor model. The isotope shift discrepancy observed is fairly well described by the droplet model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01409187
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Fine- and hyperfine structure analysis of the odd configurations in the lead atom (1984)
    Springer
    The European physical journal 315 (1984), S. 137-144 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fine- and hyperfine structure (hfs) analysis, on the basis of available experimental data for the configuration 6s 26p6d+6s 26p7s+6s 26p8s in PbI has been performed. The Slater integrals, spin-orbit parameters and the effective hfs one-electron parameters have been determined. We find an off-diagonal core-polarization effect in the 6p6d+6p7s-space. Using the calculated radial parameters, the values of the quadrupole moment for stable and radioactive Pb-nuclei have been determined from measuredB-factors of the 6p7s 3P1 state. In addition, a repulsion effect on the hfs sublevels with the same quantum numberF has been investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419372
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Projectile break-up in continuous particle spectra from nuclear reactions induced by 156 MeV6Li (1980)
    Springer
    The European physical journal 296 (1980), S. 113-122 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The break-up of 156 MeV6Li ions colliding with12C,60Ni,90Zr,120Sn and208Pb has been experimentally studied. It was found that the break-up cross section decreases rapidly with increasing emission angles of the fragments and increases with increasing target mass. It comprises a fairly large fraction of the total reaction cross section. The observed features suggest that the6Li fragmentation is mainly a peripheral process, and is dominated by the cluster properties of the incident projectile. A simple plane-wave break-up model gives a rather good description of the shapes of the break-up bumps. The angular distributions of the fragments emitted in the6Li+208Pb reaction reveal the transition from peripheral break-up to incomplete fusion processes by which beam-velocity fragments are captured by the target nucleus. In addition to the (α+d) dissociation the (3He+t) break-up has been observed, but the triton spectra appear to be rather complex indicating further components due to more complicated reaction paths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412652
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The density dependence of the effective alpha-nucleon force and isoscalar transition rates of nuclei (1984)
    Springer
    The European physical journal 316 (1984), S. 225-231 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Effects of the density-dependence of theα-particle-bound nucleon effective interaction on single-folding models of inelasticα-particle scattering are studied, in particular in view of corrections of the isoscalar transitions rates extracted by implicit folding procedures. Thel-dependent corrections factorsC l are calculated and tubulated for applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412267
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Excitation functions of191+193Ir,197Au(6Li, xn+yp) compound nuclear reactions at ELi=48–156 MeV (1977)
    Springer
    The European physical journal 280 (1977), S. 61-72 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excitation functions of the compound nuclear reactions191+193Ir,197Au(6Li,xn+yp) forx =3–13 andy=0–2 have been investigated by means of in-beamγ-ray spectroscopy at the 156 MeV6Li beam of the Karlsruhe Isochronous Cyclotron. The beam energy has been varied in the range of 48 to 156 MeV in steps of about 10 MeV by Be-absorber foils in the external beam line. Absolute cross sections have been determined by normalizing the measuredγ-ray intensities to the production cross sections ofK- X-rays in the target. The experimental excitation functions are discussed on the basis of predictions of the preequilibrium (hybrid) model. While in most cases the theoretical calculations fairly well reproduce energy position and shapes of the curves, strong discrepancies in the absolute scale of the cross sections are observed. The theoretical predictions overestimate the (6Li,xn) cross sections by a factor of about 6. Conspicuous anomalies have been detected when comparing the (6Li, xn+1(2)p) reactions with (6Li,xn) reactions. The reactions with emission of one or two protons are considerably enhanced. The discrepancies and anomalies observed are tentatively explained by the influence of direct reaction channels as the6Li break-up, which experimentally proved to be the dominant contribution to the total reaction cross section. The enhancement of the reactions with emission of protons may be a consequence of transfer reactions into highly excited states combined with compound nucleus formation thus implying a cluster effect in preequilibrium emission process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438110
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Experimental studies of the level scheme of143Eu and a generalized decoupling model description (1976)
    Springer
    The European physical journal 277 (1976), S. 129-139 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excited levels of143Eu have been investigated by nuclear spectroscopy methods. We measured γ-rays and conversion electron singles spectra as well asγγ-coincidences from mass separated143mGd sources (108 s) prepared after the irradiation of144Sm with 78 MeVα-particles. In addition in-beam data were obtained by measuringγ-ray singles spectra, angular distributions andγγ-coincidences, following the144Sm(α, 4n+ p, γ) reaction. A level scheme for143Eu comprising 19 levels is proposed, spin assignments or at least restrictions are given. The deduced experimental level scheme can be reproduced semiquantitatively by a generalized decoupling model which takes into account an asymmetric deformation of the core and a variable moment of inertia. Additionally, the results are discussed in the limit of the weak coupling model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01433704
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Orbital dispersion and wavefunction mapping in inclusive break-up experiments (1990)
    Springer
    The European physical journal 335 (1990), S. 417-420 
    Details
    ISSN: 1434-601X
    Keywords: 24.50.+ g ; 25.70.Np ; 27.20.+ n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Inclusive break-up cross sections of the reactions12C (6Li,a)X and208Pb (6Li,a)X at 26 MeV/amu, observed for the emission of break-up fragment into the forward hemisphere, are analysed in view of the information about the internal momentum distribution of the projectile. The longitudinal momentum distribution of the fragments in the projectile rest-frame is found to reflect the internal momentum distribution of the clusters whereas the transverse distribution is affected by the projectile-target interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290189
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Investigation of the sequential break-up mode6Li→6Li*(31 +)→α+d of 156 MeV6Li projectiles on208Pb in the very forward angular hemisphere (1991)
    Springer
    The European physical journal 339 (1991), S. 489-493 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.−z ; 25.70.Np ; 95.30.J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The sequential break-up of 156 MeV6Li projectiles colliding with208Pb has been investigated in the very forward angular hemisphere in order to explore the role of the Coulomb and nuclear interaction in inducing projectile break-up processes. The experiments use the Karlsruhe spectrograph “Little John” with a newly developed technique to detect efficiently break-up pairs ofα-particles and deuterons emitted with small relative energies and within a small opening angle. The observed differential cross section for the projectile excitation6Li→6Li* (I=3i +) has been analysed (together with forward elastic scattering) by a coupled channel approach, and various sensitivities to the nuclear potential and other ingredients have been studied. We conclude, that in the angular region below half the grazing angle the excitation is completely due to the Coulomb force. This feature is a basis for an application of the disintegration approach for studies of radiative capture cross section of astrophysical interest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288432
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...