No abstract available

[en] Shell model calculations have been performed for the neutron deficient Cd nuclei from N=50 through N=58. The nucleus ⁸⁸Sr is taken to be an inert core with valence protons filling the {2p_1/2,1g_9/2} orbitals and neutrons the {2d_5/2,3s_1/2,2d_3/2,1g_7/2,1h_11/2} orbitals. Using a realistic effective interaction, we have calculated the energy spectra and transition probabilities in ^{98,100,102,104,106}Cd. We have also made predictions about the presence of mixed-symmetry states that are in good agreement with the corresponding experimental data in ¹⁰⁶Cd

[en] Lifetimes of low-lying states in ^102,104Cd were determined by using the recoil distance Doppler-shift technique with a plunger device and a Ge array consisting of five HP Ge detectors and one Euroball cluster detector. The experiments were carried out at the Cologne FN Tandem facility using the ⁹²Mo(¹²C,2n)¹⁰²Cd reaction at 41 MeV and the ⁹⁴Mo(¹²C,2n)¹⁰⁴Cd reaction at 42 MeV. The differential decay curve method in coincidence mode was employed to derive the lifetime of the first 2⁺ state in both nuclei and the lifetime of the 4⁺ state in ¹⁰⁴Cd. The corresponding reduced E2 transition probabilities have been studied within the framework of the nuclear shell model

[en] Lifetimes of low-lying states in ^102,104Cd were determined by using the recoil distance Doppler shift technique with a plunger device and a Ge array consisting of five HP Ge detectors and one Euroball cluster detector. The experiments were carried out at the Cologne FN Tandem accelerator using the ^92,94Mo(¹²C,2n)^102,104Cd reactions. The differential decay curve method in coincidence mode was employed to derive the lifetime of the first excited 2⁺ state in both nuclei and the first excited 4⁺ state in ¹⁰⁴Cd. The corresponding E2 transition probabilities agree well with large scale shell-model calculations. (orig.)

[en] The ATLAS experiment at the Large Hadron Collider reads out 100 Million electronic channels at a rate of 200 Hz. Before the data are shipped to storage and analysis centres across the world, they have to be checked to be free from irregularities which render them scientifically useless. Data quality offline monitoring provides prompt feedback from full first-pass event reconstruction at the Tier-0 computing centre and can unveil problems in the detector hardware and in the data processing chain. Detector information and reconstructed proton-proton collision event characteristics are distilled into a few key histograms and numbers which are automatically compared with a reference. The results of the comparisons are saved as status flags in a database and are published together with the histograms on a web server. They are inspected by a 24/7 shift crew who can notify on-call experts in case of problems and in extreme cases signal data taking abort.

[en] At the ATLAS experiment, the Detector Control System (DCS) is used to oversee detector conditions and supervise the running of equipment. It is essential that information from the DCS about the status of individual sub-detectors be extracted and taken into account when determining the quality of data taken and its suitability for different analyses. DCS information is written to the ATLAS conditions database and then summarised to provide a status flag for each sub-detector and displayed on the web. We discuss how this DCS information should be used, and the technicalities of making this summary.

[en] The Advanced-Time-Delayed method was used to measure lifetimes of the states in ⁴¹Ar populated in the β decay of ⁴¹Cl. The nuclei ⁴¹Cl were produced at ISOLDE by 1.4-GeV proton bombardment of a thick UC_x target and mass-separated as molecular ions, XeCl⁺. Our measured half-life of the 167.1-keV state, T_1/2=315(15) ps, is significantly lower than the previously measured value of 410(30) ps. We have also determined T_1/2=260(80) ps and T_1/2≤46 ps for the 515.9- and 1867.7-keV states, respectively. These are the shortest lifetimes measured so far with the ultrafast timing method using the new LaBr₃(Ce) crystals for γ-ray detection