Thu·May 12, 2016Thursday·May 12, 2016

1. 01*

   A search for the radiative neutrinoless double electron capture of ${}^{58}$Ni

   B. Lehnert🇩🇪 · D. Degering🇩🇪 · A. Frotscher🇩🇪 · T. Michel🇩🇪 · K. Zuber🇩🇪

   A search for the radiative neutrinoless double electron capture with single \gray\ emission has been performed in ${}^{58}$Ni. Gamma radiation from a 7286 g nickel sample in natural isotope composition was measured for 58.3 d with an ultra low background HPGe detector in the Felsenkeller underground laboratory in Dresden, Germany. A new lower half-life limit of $2.1\times 10^{21}$ yr (90% CL) was obtained for this decay mode. This half-life limit is two orders of magnitude higher than the existing limit for ${}^{58}$Ni and among the best half-life limits for neutrinoless double electron capture decays.

   nucl-exJ.Phys.G(2016)·13 citations
2. 02*

   Charged jets in p--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV measured with the ALICE detector

   Rüdiger Haake (for the ALICE Collaboration)🇨🇭

   Highly energetic jets are sensitive probes for the kinematics and the topology of nuclear collisions. Jets are collimated sprays of charged and neutral particles, which are produced in the fragmentation of hard scattered partons in the early stage of the collision. The measurement of nuclear modification of charged jet spectra in p-Pb collisions provides an important way of quantifying the effects of cold nuclear matter in the initial state on jet production, fragmentation, and hadronization. Unlike in Pb-Pb collisions, modifications of jet production due to hot nuclear matter effects are not expected to occur in p-Pb collisions. Therefore, measurements of nuclear modifications in charged jet spectra in p-Pb collisions (commonly known as $R_{\mathrm{pPb}}$) can be used to isolate and quantify cold nuclear matter effects. Potential nuclear effects are expected to be more pronounced in more central p-Pb collisions due to a higher probability of an interaction between the proton and the lead-nucleus. To measure the centrality dependence of charged jet spectra, it is crucial to use a reliable definition of event centrality, which ALICE developed utilizing the Zero-Degree Calorimeter (ZDC).

   nucl-ex0 citations
3. 03*

   Radiative nucleon capture with quasi-separable potentials

   Shubhchintak🇺🇸 · C. A. Bertulani🇺🇸 · A. M. Mukhamedzhanov · A. T. Kruppa

   We study radiative capture reactions using quasi-separable potentials. This procedure allows an easier treatment of non-local effects that can be extended to three-body problems. Using this technique, we calculate the neutron and proton radiative capture cross sections on ${}^{12}$C. The results obtained are shown to be in good agreement with the available experimental data.

   ↳ nucl-thnucl-exJ.Phys.G(2016)·6 citations
4. 04*

   The Southern Hemisphere Hunt for Dark Matter at the Stawell Underground Physics Laboratory

   Phillip Urquijo🇦🇺

   I report on the Stawell Underground Physics Laboratory (SUPL), a new facility to be built in 2016, located 1 km below the surface in western Victoria, Australia. I will discuss the status of the proposed SABRE experiment, which will be comprised of a pair of high purity 50-60 kg NaI crystal detectors with active veto shielding to be located in labs in the Northern and Southern Hemispheres respectively. I also discuss projects beyond SABRE, including directional dark matter detectors, which will be used to determine the origin of any true dark matter signals.

   ↳ physics.ins-dethep-exnucl-exEPJ Web Conf.(2016)·9 citations
5. 05*

   Data Acquisition System for Segmented Reactor Antineutrino Detector

   Zdenek Hons · Jakub Vlášek

   This paper describes the data acquisition system used for data readout from a segmented detector of reactor antineutrinos with active shielding. Theoretical approach to the data acquisition is described and two possible solutions using QDCs and digitizers are discussed. Also described are the results of the DAQ performance during routine data taking operation of DANSS. DANSS (Detector of the reactor AntiNeutrino based on Solid Scintillator) is a project aiming to measure a spectrum of reactor antineutrinos using inverse beta decay (IBD) in a plastic scintillator. The detector is located close to an industrial nuclear reactor core and is covered by passive and active shielding. It is expected to have about 15000 IBD interactions per day. Light from the detector is sensed by PMT and SiPM.

   ↳ physics.ins-detnucl-exJINST(2017)·4 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.