Fri·Oct 28, 2016Friday·October 28, 2016

1. 01*

   Cross section measurement of alpha particle induced nuclear reactions on natural cadmium up to 52 MeV

   F. Ditrói · S. Takács · H. Haba🇯🇵 · Y. Komori · M. Aikawa

   Cross sections of alpha particle induced nuclear reactions have been measured on thin natural cadmium targets foils in the energy range from 11 to 51.2 MeV. This work was a part of our systematic study on excitation functions of light ion induced nuclear reactions on different target materials. Regarding the cross sections, the alpha induced reactions are not deeply enough investigated. Some of the produced isotopes are of medical interest, others have application in research and industry. The radioisotope ${}^{117m}$Sn is a very important theranostic (therapeutic + diagnostic) radioisotope, so special care was taken to the results for that isotope. The well-established stacked foil technique followed by gamma-spectrometry with HPGe gamma spectrometers were used. The target and monitor foils in the stack were commercial high purity metal foils. From the irradiated targets ${}^{117m}$Sn, ${}^{113}$Sn, ${}^{110}$Sn, ${}^{117m,g}$In, ${}^{116m}$In, ${}^{115m}$In, ${}^{114m}$In, ${}^{113m}$In, ${}^{111}$In, ${}^{110m,g}$In, ${}^{109m}$In, ${}^{108m}$In, ${}^{115g}$Cd and ${}^{111m}$Cd were identified and their excitation functions were derived. The results were compared with the data of the previous measurements from the literature and with the results of the theoretical nuclear reaction model code calculations TALYS 1.8 (TENDL-2015) and EMPIRE 3.2 (Malta). From the cross section curves thick target yields were calculated and compared with the available literature data.

   nucl-exAppl.Radiat.Isot.(2016)·4 citations
2. 02*

   Constraints on rapidity-dependent initial conditions from charged particle pseudorapidity densities and two-particle correlations

   Weiyao Ke🇺🇸 · J. Scott Moreland🇺🇸 · Jonah E. Bernhard🇺🇸 · Steffen A. Bass🇺🇸

   We study the initial three-dimensional spatial configuration of the quark-gluon plasma produced in relativistic heavy-ion collisions using centrality and rapidity-dependent measurements of charged particle pseudorapidity densities and two-particle correlations. A cumulant-generating function is used to parametrize the rapidity dependence of local entropy deposition and extend arbitrary boost-invariant initial conditions to nonzero beam rapidities. The model is compared to p+Pb and Pb+Pb single-particle distributions and systematically optimized using Bayesian parameter estimation to extract high-probability initial condition parameters. The optimized initial conditions are then compared to a number of experimental observables including two-particle rapidity correlations, the rapidity dependence of anisotropic flow, and event-plane decorrelations.

   ↳ nucl-thnucl-exPRC(2017)·73 citations
3. 03*

   Importance of volume corrections on the net-charge distributions at the RHIC BES energies

   Hao-jie Xu🇨🇳

   The paper presents my recent investigations of volume corrections on the cumulant products of net-charge distributions in statistical model, corresponding to the data reported by the STAR collaboration. The corrected statistical expectations, under simple Poisson approximations, can reasonably explain the data measured in experiment. The results indicate that volume corrections play crucial role in event-by-event multiplicity fluctuation studies.

   ↳ nucl-thnucl-exActa Phys.Polon.Supp.(2017)·2 citations
4. 04*

   The effect of hydrodynamical simulation inspired dark matter velocity profile on directional detection of dark matter

   Ranjan Laha🇺🇸

   Directional detection is an important way to detect dark matter. An input to these experiments is the dark matter velocity distribution. Recent hydrodynamical simulations have shown that the dark matter velocity distribution differs substantially from the Standard Halo Model. We study the impact of some of these updated velocity distribution in dark matter directional detection experiments. We calculate the ratio of events required to confirm the forward-backward asymmetry and the existence of the ring of maximum recoil rate using different dark matter velocity distributions for ${}^{19}$F and Xe targets. We show that with the use of updated dark matter velocity profiles, the forward-backward asymmetry and the ring of maximum recoil rate can be confirmed using a factor of $\sim$2 - 3 less events when compared to that using the Standard Halo Model.

   ↳ astro-ph.COastro-ph.GAhep-exhep-ph+1PRD(2018)·6 citations
5. 05*

   PandaX-III: Searching for Neutrinoless Double Beta Decay with High Pressure ${}^{136}$Xe Gas Time Projection Chambers

   Xun Chen🇨🇳 · Changbo Fu🇨🇳 · Javier Galan🇨🇳 · Karl Giboni🇨🇳 · Franco Giuliani🇨🇳 · Linghui Gu🇨🇳 · Ke Han🇨🇳 · Xiangdong Ji🇨🇳 · Heng Lin🇨🇳 · Jianglai Liu🇨🇳 · Kaixiang Ni🇨🇳 · Hiroki Kusano🇨🇳 and 58 other authors

   Searching for the Neutrinoless Double Beta Decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (Particle And Astrophysical Xenon Experiment III) will search for the NLDBD of ${}^{136}$Xe at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% ${}^{136}$Xe enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct tracks of NLDBD events and provide good energy and spatial resolution. The detector will be immersed in a large water tank to ensure $\sim$5 m of water shielding in all directions. The second phase, a ton-scale experiment, will consist of five TPCs in the same water tank, with improved energy resolution and better control over backgrounds.

   ↳ physics.ins-dethep-exnucl-exSCPMA(2017)·153 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.