Wed·Aug 26, 2015Wednesday·August 26, 2015

1. 01*

   Spins and magnetic moments of 58;60;62;64Mn ground states and isomers

   H. Heylen🇧🇪 · C. Babcock🇬🇧 · J. Billowes🇬🇧 · M.L. Bissell🇧🇪 · K. Blaum🇩🇪 · P. Campbell🇬🇧 · B. Cheal🇬🇧 · R.F. Garcia Ruiz🇧🇪 · Ch. Geppert🇩🇪 · W. Gins🇧🇪 · M. Kowalska🇨🇭 · K. Kreim🇩🇪 and 7 other authors

   The odd-odd 54;56;58;60;62;64Mn isotopes (Z = 25) were studied using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. From the measured hyperfine spectra the spins and magnetic moments of Mn isotopes up to N = 39 were extracted. The previous tentative ground state spin assignments of 58;60;62;64Mn are now firmly determined to be I = 1 along with an I = 4 assignment for the isomeric states in 58;60;62Mn. The I = 1 magnetic moments show a decreasing trend with increasing neutron number while the I = 4 moments remain quite constant between N = 33 and N = 37. The results are compared to large-scale shell-model calculations using the GXPF1A and LNPS effective interactions. The excellent agreement of the ground state moments with the predictions from the LNPS calculations illustrates the need for an increasing amount of proton excitations across Z = 28 and neutron excitations across N = 40 in the ground state wave functions from N = 37 onwards.

   nucl-exPRC(2015)·16 citations
2. 02*

   A prestorage method to measure neutron transmission of ultracold neutron guides

   B.Blau · M.Daum · M.Fertl · P.Geltenbort · L.Goeltl · R.Henneck · K.Kirch · A.Knecht · B.Lauss · P.Schmidt-Wellenburg · G.Zsigmond

   There are worldwide efforts to search for physics beyond the Standard Model of particle physics. Precision experiments using ultracold neutrons (UCN) require very high intensities of UCN. Efficient transport of UCN from the production volume to the experiment is therefore of great importance. We have developed a method using prestored UCN in order to quantify UCN transmission in tubular guides. This method simulates the final installation at the Paul Scherrer Institute's UCN source where neutrons are stored in an intermediate storage vessel serving three experimental ports. This method allowed us to qualify UCN guides for their intended use and compare their properties.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2016)·12 citations
3. 03*

   Light Collection in the Prototypes of the ANAIS Dark Matter Project

   Julio Amaré🇪🇸 · Susana Cebrián🇪🇸 · Clara Cuesta🇪🇸 · Eduardo García🇪🇸 · María Martínez🇪🇸 · Miguel A. Oliván🇪🇸 · Ysrael Ortigoza🇪🇸 · Alfonso Ortíz de Solórzano🇪🇸 · Carlos Pobes🇪🇸 · Jorge Puimedón🇪🇸 · María Luisa Sarsa🇪🇸 · José Ángel Villar🇪🇸 · Patricia Villar🇪🇸

   The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS detectors consist of large NaI crystals coupled to two photomultipliers (PMTs). In this work we present Single Electron Response (SER) data for several units of the Hamamatsu R12669SEL2 PMT model extracted from normal operation data of ANAIS underground prototypes and we compare them with PMT SER characterization previously done at surface lab before coupling them to NaI crystal. Moreover, total light collection for different ANAIS prototypes has been calculated, producing an excellent average result of 15 phe/keV, which has a good impact in both energy resolution and threshold.

   ↳ physics.ins-detastro-ph.GAhep-exnucl-ex4 citations
4. 04*

   Is hadronic flow produced in p--Pb collisions at the Large Hadron Collider?

   You Zhou🇩🇰 · Xiangrong Zhu🇨🇳 · Pengfei Li🇨🇳 · Huichao Song🇨🇳

   Using the Ultra-relativistic Quantum Molecular Dynamics ({\tt UrQMD}) model, we investigate the azimuthal correlations in p--Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=5.02$ TeV. It is shown that the simulated hadronic p--Pb system can not generate the collective flow signatures, but mainly behaves as a non-flow dominant system. However, the characteristic $v_2(p_{\mathrm{T}})$ mass-ordering of pions, kaons and protons is observed in {\tt UrQMD} simulations, which is the consequence of hadronic interactions and not necessarily associated with strong fluid-like expansions.

   ↳ nucl-thnucl-exEPJ Web Conf.(2016)·0 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.