We have studied the f decay of the Tz = -1 , f y2 shell nuclei 54Ni, 50Fe, 46Cr, and 42Ti produced in fragmentation reactions. The proton separation energies in the daughter T. = 0 nuclei are relatively large («4-5 MeV) so studies of the y rays are essential. The experiments were performed at GSI as part of the Stopped-beam campaign with the RISING setup consisting of 15 Euroball Cluster Ge detectors. From the newly obtained high precision /1-decay half-lives, excitation energies, and f branching ratios, we were able to extract Fermi and Gamow-Teller transition strengths in these f) decays. With these improved results it was possible to compare in detail the Gamow-Teller (GT) transition strengths observed in beta decay including a sensitivity limit with the strengths of the Tz = +1 to Tz = 0 transitions derived from high resolution (3He,f) reactions on the mirror target nuclei at RCNP, Osaka. The accumulated B(GT) strength obtained from both experiments looks very similar although the charge exchange reaction provides information on a broader energy range. Using the "merged analysis" one can obtain a full picture of the £(GT) over the full Qp range. Looking at the individual transitions some differences are observed, especially for the weak transitions. Their possible origins are discussed.

The fragmentation of neutron-rich 132 Sn nuclei produced in the fission of 238 U projectiles at 950 MeV/u has been investigated at the FRagment Separator (FRS) at GSI. This work represents the first investigation of fragmentation of medium-mass radioactive projectiles with a large neutron excess. The measured production cross sections of the residual nuclei are relevant for the possible use of a two-stage reaction scheme (fission+fragmentation) for the production of extremely neutron-rich medium-mass nuclei in future rare-ion-beam facilities. Moreover, the new data will provide a better understanding of the "memory" effect in fragmentation reactions.

This paper was published online on 5 August 2010 with some typographical errors in Table I, and some errors in the references. References 41, 42, 43, and 45 have been removed and references were renumbered accordingly. The Table and references have been corrected as of 30 August 2010. The Table and references are correct in the printed version of the journal.

Courchesne, Structure and scintillation of Eu 2 þ -activated calcium bromide iodide, Journal of Luminescence, http://dx. AbstractWe report the structure and scintillation properties of Eu 2+ -activated calcium bromide iodide. CaBr 0.7 I 1.3 was the only composition that could be synthesized in the CaBr 2 -CaI 2 system. The compound has an effective atomic number of 47 and crystallizes in a trigonal crystal system with the R-3 space group and a density of 3.93 g/cc. The structure is layered and contains Ca in an octahedral environment with the Br/I anions jointly occupying a single site. Eu 2+ -activated samples show an intense narrow emission, characteristic of the 5d-4f transition of Eu 2+ , when excited with UV or X-rays. The sample with 0.5% Eu shows a light output of 63,000 ph/MeV at 662 keV with 96% of the light emitted with a monoexponential decay time of 1,332 ns. An energy resolution of 10.4% full width at half maximum (FWHM) has been achieved for 662 keV gamma rays at room temperature.

We have previously reported the scintillation properties of CsBa 2 I 5 activated with Eu 2+ , which exhibits excellent behavior [1, 2]. The presence of Cs in the lattice makes CsBa 2 I 5 a good candidate for activation with monovalent ions. We grew single crystals of CsBa 2 I 5 with monovalent ions Tl, Na and In as activators. We performed a series of luminescence and scintillation measurements, including pulse height measurements using two different photosensors, on these crystals. We show not only that the monovalent ions are suitable activators in the chosen host lattice but also that the system has light yields between 33,000 and 40,000 ph/MeV, lower self absorption than observed in Eu doped samples and excellent proportionality. The measured energy resolution on our initial samples of 7.1% FWHM for 662 keV gamma rays using avalanche photodiodes is very promising.