[en] Guided by the formalism developed for studies of single-nucleon transfer reactions in deformed nuclei, we have analyzed spectroscopic factors data in the Islands of Inversion at N=8 and 20, in the rotational strong-coupling limit. Based on the fact that intruder deformed configurations dominate the low-lying structure of nuclei within the Islands of Inversion, the Nilsson formalism provides an intuitive and simple approach to obtain important structure information from direct reactions, and a complementary view to shell model calculations. We will present results for ^10,11,12Be and ^32,33Mg, showing good agreement with the experimental data, and discuss some predictions for other regions. This document is composed of an abstract and the slides of the presentation. (author)

[en] We have measured the charge fractions of uranium ions at energies of 962 MeV/amu and 430 MeV/amu passing through various thickness targets of mylar (Z approx. = 6.6), Cu (Z = 29) and Ta (Z = 73). From these we determine the equilibrium charge state distributions

[en] First results are reported from a study of reaction mechanisms in a ⁴⁰Ar beam of 10⁸ particles/s to bombard thorium and carbon targets. Results for energy spectra widths to be used to extract the temperature of the emitting system and those for the distribution of isotopes are being analyzed. 7 references

[en] The authors show the layout of the experiment HISS 320. This experiment is designed to capture and analyze all charged projectile fragments produced in the interaction of 2 GeV/nucleon 12C with C, CH, Cu or U targets. Analysis consists of identifying charge, mass and vector momentum for each fragment. This is accomplished through use of a drift chamber system to give trajectories through the magnetic field of the HISS dipole, combined with velocity measurement provided by a time-of-flight scintillator array called the TOF wall. This report describes the present status of the TOF wall system

[en] GRETINA, a first implementation of a gamma-ray tracking array, combines unparalleled position resolution, large Ge efficiency, and good P/T to provide a powerful tool for in-beam gamma-ray spectroscopy. The commissioning in 2012 demonstrated the technical feasibility and unique capabilities of a gamma-ray tracking array, and successful physics campaigns have followed at NSCL/MSU (2013/14) and ATLAS/ANL (2014/15). New physics results have been shown in a broad range of topics, confirming the excellent performance of the array in both high and Coulomb barrier- energy environments, and in multiple configurations. GRETINA is again operating at NSCL for a second campaign coupled to the S800 spectrometer. In line with the topic of this workshop, we will present selected highlights from these scientific campaigns that have focused on the studies of nuclear shapes, symmetries, and collectivity. This document is composed of an abstract and the slides of the presentation. (author)

[en] We argue that the ratio S₃ = _#Lambda#³H/(³He x Λ/p) is a good representation of the local correlation between baryon number and strangeness, and therefore is a valuable tool to probe the nature of the dense matter created in high energy heavy-ion collision: quark gluon plasma or hadron gas. A multiphase transportmodel (AMPT) plus a dynamical coalescence model is used to elucidate our arguments. We find that AMPT with string melting predicts an increase of S₃ with increasing beam energy, and is consistent with experimental data, while AMPT with only hadronic scattering results in a low S₃ throughout the energy range from AGS to RHIC, and fails to describe the experimental data.

[en] The authors have constructed and tested a small prototype drift chamber designed for high energy heavy ions. When a drift chamber is used as a tracking detector for heavy projectile fragments from high energy nucleus-nucleus reactions, the major problem comes from the many spurious hits due to delta-rays. Three methods have been developed to solve this problem. The first one is to use a constant fraction discriminator to pick up the timing signal from the core ionization under the large background of delta-rays. The second one is to use pulse height information from the drift chamber to find the cell hit by the heavy ion. The last one is the idea of distributed planes. Modular planes (12 in this case) are distributed 10 cm apart on a rigid base plate to provide accurate relative positioning of the wires. The performance of the prototype chamber has been measured as a function of the high voltage bias and of the charge of the heavy ion from protons up to uranium at around 1 GeV/nucleon

[en] The micro-well detector is a gas-proportional counter similar to the CAT (Bartol et al., J. Phys. III 6 (1996) 337) and WELL detectors (Bellazzini et al., Nucl. Instr. and Meth. A 423 (1999) 125). The micro-well is a cylindrical hole formed in the polymer substrate of commercially fabricated copper-clad flexible printed circuit board by UV laser ablation. The micro-wells are drilled at GSFC's UV laser-ablation facility. The cathode is a metal annulus that surrounds the opening of the well. The anode is a metal pad that fills the bottom of the well. Advantages of this topology include intrinsic two-dimensional sensing, thick robust electrodes, and large localized image charge on the cathodes. We have fabricated 5 cmx5 cm micro-well detectors with segmented anodes (1-d) and with both anodes and cathodes segmented (2-d), and have demonstrated: - stable, proportional operation at gas gains in excess of 30,000 in Ar- and Xe-based gases; - FWHM energy resolution of 20% at 6 keV in P-10; - preliminary 1-d spatial resolution of ≤150 μm (rms) in P-10; and; - the capability of MWDs to produce 2-dimensional images. We report on the design, fabrication, and testing of 1-d, 2-d, and pixelized micro-well detectors

[en] We report equilibrium charge state distributions of uranium at energies of 962 MeV/nucleon, 437 MeV/nucleon and 200 MeV/nucleon in low Z and high Z targets and the cross sections for U⁹²⁺ reversible U⁹¹⁺ and U⁹¹⁺ reversible U⁹⁰⁺ at 962 MeV/nucleon and 437 MeV/nucleon. Equilibrium thickness Cu targets produce approx. = 5% bare U⁹²⁺ at 200 MeV/nucleon and 85% U⁹²⁺ at 962 MeV/nucleon. 7 references, 5 figures

[en] We report on results achieved by recording the waveforms produced by a common multiwire proportional chamber (MWPC). Data were taken using a ⁹⁰Sr source at pressures between 6 and 43 atm and voltages over a range of gains allowing the current signal to be viewed directly into 50 Ω on a Tektronix CSA 803 digital processing oscilloscope. A systematic study was made using an argon-methane (90-10) gas mixture. A fastest rise time per amplitude of 40 ps/mV was observed at 22 atm. Faster signals have been observed by mixing a small fraction of freon 13B1 in an argon-methane (90-10) gas mixture, thus limiting the charge transport efficiency to a region near the anode wires. This yielded a rise time per amplitude of ≅ 5 ps/mV. In this way, average rise times in the raw signals of a few hundred picoseconds have been observed at 20 atm. Time spectra acquired with the use of an external scintillator trigger are also shown. (orig.)