A. Jungclaus

Isomeric decay studies in neutron-rich N ≈ 126 nuclei

Heavy neutron-rich nuclei were populated via relativistic energy fragmentation of a E/A = 1 GeV208Pb beam. The nuclei of interest were selected and identified by a fragment separator and then implanted in a passive plastic stopper. Delayed γ rays following internal isomeric decays were detected by the RISING array. Experimental information was obtained on a number of nuclei with Z = 73-80 (Ta-Hg), providing new information both on the prolate-oblate transitional region as well as on the N = 126 closed shell nuclei.

Isomeric mirror states as probes for effective charges in the lower pf shell

Following the fragmentation of a 550 MeV u −1 primary beam of 58 Ni, timeand energy-correlated γ decays from isomeric states in neutron-deficient nuclei in the 1f7/2 shell have been identified using the GSI fragment separator in combination with the RISING Ge-detector array. The results on isomers in the mirror pairs 43 Ti 21 – 43 Sc 22 (I π = 3/2 + and 19/2 − ), 45 Cr 21 – 45 Sc 24 (I π = 3/2 + ) and 45V22– 45Ti23 (I π = 3/2 − ) are discussed in the framework of large scale

Intruder configurations in neutron-rich P and S isotopes

Neutron-rich sdf-shell nuclei have attracted a great deal of international interest, both theoretically and experimentally. There is an increasing interest in using deep-inelastic reactions to obtain spectroscopic information about these exotic nuclei. New results obtained from two such experiments are presented here. The highly sensitive GASP array was used to measure the γ decays of previously unobserved yrast and near yrast states of 34P which were populated when 230 MeV 36S ions were incident on a thick target of 176Yb. In addition, a recent investigation of the spectroscopy of neutron-rich P and S isotopes has been undertaken with 215 MeV 36S ions incident on a thin target of 208Pb using the CLARA Ge detector array in conjunction with the PRISMA magnetic spectrometer. Preliminary results from this experiment are presented here.

First results from the stopped RISING campaign at GSI: The mapping of isomeric decays in highly exotic nuclei

The first results from the Stopped Beam RISING experimental campaign performed at the GSI laboratory in Darmstadt, Germany, are presented. RISING (Rare ISotope INvestigations at GSI) constitutes a major new experimental program in European nuclear structure physics research aimed at using relativistic‐energy, projectile‐fragmentation reactions to study nuclei with exotic proton‐to‐neutron ratios. This paper introduces the physics aims of the Stopped RISING collaboration and presents some technical details and initial results from experiments using the RISING array to study decays from metastable nuclear states in both proton and neutron‐rich nuclei.

Beyond mean field study of nuclei in the 132Sn region

The region around the doubly magic 132Sn has been the subject of numerous experimental and theoretical studies in the last few years. The reason is that it is of special importance both for nuclear structure as well as nuclear astrophysics. Since the r-process of nucleosynthesis proceeds along the N=82 shell closure there is a close relation between the N=82 shell gap and the A ? 130 peak of the solar r-process abundance distribution. Some years ago it had been demonstrated that the assumption of a spherical quenching of the N = 82 neutron shell close to the neutron dripline allows us to properly reproduce the observed abundances. Recently, the unexpected behaviour of the measured 2+ excitation energies in the heavy Cd isotopes 126,128,130Cd have been interpreted as evidence for a weakening of the N = 82 shell closure already one proton pair below 132Sn. This study motivated us to perform a detailed beyond mean field study of this region in order to investigate the origin of the observed anomaly of the 2+ energies in the Cd isotopes.

γ-ray spectroscopy of 1738Cl using grazing reactions

Excited states of

γ-ray spectroscopy of 3817Cl using grazing reactions

^{38}_{17}

Nuclear Structure Addressed At GSI/RISING

Cl

RISING: Gamma‐ray Spectroscopy with Radioactive Beams at GSI

_{21}

The Spectroscopy of Neutron-Rich sdf-Shell Nuclei Using the CLARA-PRISMA Setup

were populated in grazing reactions during the interaction of a beam of