Fri·Nov 30, 2018Friday·November 30, 2018

1. 01*

   Storage ring mass spectrometry for nuclear structure and astrophysics research

   Y. H. Zhang🇨🇳 · Yu. A. Litvinov🇩🇪 · T. Uesaka🇯🇵 · H. S. Xu🇨🇳

   In the last two and a half decades ion storage rings have proven to be powerful tools for precision experiments with unstable nuclides in realm of nuclear structure and astrophysics. There are presently three storage ring facilities in the world at which experiments with stored radioactive ions are possible. These are the ESR in GSI, Darmstadt/Germany, the CSRe in IMP, Lanzhou/China, and the R3 storage ring in RIKEN, Saitama/Japan. In this work, an introduction to the facilities is given. Selected characteristic experimental results and their impact in nuclear physics and astrophysics are presented. Planned technical developments and the envisioned future experiments are outlined.

   nucl-exphysics.acc-phPhys.Scripta(2016)·55 citations
2. 02*

   Wigner-Eckart Theorem and the False EDM of ${}^{199}$Hg

   Wolfgang Klassen🇨🇦 · Jeffery W. Martin🇨🇦 · Guillaume Pignol🇫🇷

   In neutron electric dipole moment experiments, 199Hg is used as a comagnetometer. The comagnetometer suffers from a false EDM arising in leading order from a gradient dBz/dz in the magnetic field. Our work concerns higher-order multipole corrections to the false EDM of 199Hg. We show that for spherical traps, all higher-order multipole are identically zero. We further show that for the usual cylindrical traps used in EDM experiments, selection of quasi-spherical dimensions for the trap can reduce the higher-order contributions. The results are another indication that trap geometry is an important consideration for experiments desiring to control this systematic effect.

   ↳ nucl-thnucl-exphysics.ins-detNucl.Instrum.Meth.A(2019)·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.