Astrophysical relevance of the low-energy dipole strength of 206Pb
Abstract not provided
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Engineering topics
Lenske, H
Publications and source records attributed to Lenske, H.
Matter radii of {sup 32-35}Mg
The interaction cross sections of {sup 32-35}Mg at 900A MeV have been measured using the fragment separator at GSI. The deviation from the r{sub 0}A{sup 1/3} trend is slightly larger for {sup 35}Mg, signaling the possible formation of a longer tail in the neutron distribution for {sup 35}Mg. The radii extracted from a Glauber model analysis with Fermi densities are consistent with models predicting the development of neutron skins.
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Exploring the anomaly in the interaction cross section and matter radius of (23)O
New measurements of the interaction cross sections of {sup 22,23}O at 900A MeV performed at the GSI, Darmstadt are reported that address the unsolved puzzle of the large cross section previously observed for {sup 23}O. The matter radii for these oxygen isotopes extracted through a Glauber model analysis are in good agreement with the new predictions of the ab initio coupled-cluster theory reported here. They are consistent with a {sup 22}O + neutron description of {sup 23}O as well.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Spin-(5/2) fields in hadron physics
We show that the Lagrangian of a free spin-(5/2) field in the spinor-tensor representation with an auxiliary spinor field depends on three arbitrary parameters. The first two parameters are associated with the spin-(3/2) and spin-(1/2) sector of the theory while the last is related to the auxiliary degrees of freedom. We derive a corresponding propagator of the system which represents a (2x2) matrix in the (psi{sub m}u{sub n}u,xi) space. The diagonal terms stand for the propagation of the spin-(5/2) and auxiliary fields whereas the nondiagonal ones correspond to the psi{sub m}u{sub n}u-xi mixing. The resulting spin-(5/2) propagator contains nonpole contributions coming from the spin-(3/2) and spin-(1/2) sector of the spinor-tensor representation. A general form of the interaction vertex involving the spin-(5/2) field is discussed by the example of the piNN{sub (5/2)}* coupling. It is demonstrated that lower spin degrees of freedom can be removed from the theory by use of higher-order derivative coupling.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Study of the {sup 19}O states via the ({sup 7}Li,{sup 7}Be) reaction at 52 MeV
The {sup 19}F({sup 7}Li,{sup 7}Be){sup 19}O reaction at 52 MeV incident energy has been performed at INFN-LNS in Catania using the MAGNEX large acceptance spectrometer. The use of an algebraic ray-reconstruction technique has allowed to extract the {sup 19}O excitation energy spectrum and the experimental angular distributions. A theoretical analysis based on the Quasi-particle Random Phase Approximation has described the transitions to the 1p-1h states of the {sup 19}O, in close agreement with the experimental cross sections without using any scaling factor.
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗