J. Jastrzȩbski

Information on antiprotonic atoms and the nuclear periphery from the PS209 experiment

A. Trzcińska, J. Jastrzȩbski, T. Czosnyka, T. von Egidy, K. Gulda, F. J. Hartmann, J. Iwanicki, B. Ketzer, M. Kisieliński, B. K los, W. Kurcewicz P. Lubiński, P. J. Napiorkowski, L. Pieńkowski, R. Schmidt, E. Widmann Heavy Ion Laboratory, Warsaw University, PL-02-093 Warsaw, Poland Physik-Department, Technische Universität München, D-85747 Garching, Germany Institute of Experimental Physics, Warsaw University, PL-00-681, Warsaw, Poland Institute of Physics, University of Silesia, PL-40-007 Katowice, Poland CERN, CH-1211 Geneva 23, Switzerland

NEUTRON DENSITY DISTRIBUTIONS FROM ANTIPROTONIC ATOMS COMPARED WITH HADRON SCATTERING DATA

The nuclear periphery was studied by using antiprotons. Two experimental methods were applied: analysis of the antiproton annihilation residues one mass unit lighter than the target mass by nuclear spectroscopy and the measurement of strong interaction effects on antiprotonic level widths and shifts. 26 isotopes from a wide range of mass numbers (40<A<238) were investigated. The gathered antiprotonic-atom data were compared with the results obtained using hadron scattering methods and with some expectations from theoretical approaches.

Nucleon density in the nuclear periphery determined with antiprotonic x rays: Cadmium and tin isotopes

The x-ray cascade from antiprotonic atoms was studied for 106Cd, 116Cd, 112Sn, 116Sn, 120Sn, and 124Sn. Widths and shifts of the levels due to strong interaction were deduced. Isotopic effects in the Cd and Sn isotopes are clearly seen. The results are used to investigate the nucleon density in the nuclear periphery. The deduced neutron distributions are compared with the results of the previously introduced radiochemical method and with HFB calculations.

Signature of a neutron halo in 232Th from antiproton absorption

Abstract We demonstrate a new method for the investigation of the neutron to proton density ratio at the nuclear surface. The method relies on the radiochemical determination of some residual nuclei after the annihilation of stopped antiprotons. A clear neutron halo effect has been observed with the 232 Th target.

Antiprotonic investigation of the nuclear periphery

Some results inferred from a program devoted to the study of the nuclear periphery using antiprotonic atoms are presented.

Gold fragmentation induced by stopped antiprotons

A natural gold target was irradiated with the antiproton beam from the low-energy antiproton ring at CERN. Antiprotons of

Nuclear interactions of antiprotons: theory

200\mathrm{MeV}/c

Antiprotonic atoms — a tool for the investigation of the nuclear periphery

momentum were stopped in a thick target, products of their annihilations on Au nuclei were detected using the off-line

The peripheral neutron distribution in stable nuclei deduced from antiprotonic atoms

\ensuremath{\gamma}

Antiprotonic atoms as a tool to study the nuclear periphery

-ray spectroscopy method. In total, yields for 114 residual nuclei were determined, providing a dataset to deduce the complete mass and charge distribution of all products with