Status of Three Species of Freshwater Snails (Gastropoda: Pleuroceridae) in the Lower Ohio River Basin, Illinois

Illinois Department of Natural Resources Wildlife Preservation Fund Grant/Contract No: RC08-L20WWe report on a status survey of Lithasiaspp. (Gastropoda:Pleuroceridae) we conducted in the Ohio River basin, Illinois. Prior to oursurvey, only three Lithasiaspecies were known to occur in Illinois; however,through our efforts, we found a fourth species (Lithasia geniculata). Thedistribution of L. armigeraand L. verrucosadoes not appear to have changedwithin Illinois, whereas the distribution of L. obovataappears to be declining inIllinois, which prompted us to nominate it for inclusion on the state list ofendangered and threatened species for Illinois by the Illinois Endangered SpeciesProtection Board.Lithasia geniculatahas been recorded only in one location, andwe feel it should be considered for state endangeredINHS Technical Report Prepared for Illinois Department of Natural Resources Wildlife Preservation Fun

Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances

We study the interspecies scattering properties of ultracold Li-Cs mixtures in their two energetically lowest spin channels in the magnetic field range between 800 G and 1000 G. Close to two broad Feshbach resonances we create weakly bound LiCs dimers by radio-frequency association and measure the dependence of the binding energy on the external magnetic field strength. Based on the binding energies and complementary atom loss spectroscopy of three other Li-Cs s-wave Feshbach resonances we construct precise molecular singlet and triplet electronic ground state potentials using a coupled-channels calculation. We extract the Li-Cs interspecies scattering length as a function of the external field and obtain almost a ten-fold improvement in the precision of the values for the pole positions and widths of the s-wave Li-Cs Feshbach resonances as compared to our previous work [Pires \textit{et al.}, Phys. Rev. Lett. \textbf{112}, 250404 (2014)]. We discuss implications on the Efimov scenario and the universal geometric scaling for LiCsCs trimers

Mollusks of the Shawnee National Forest – Part II

North American native mollusks are among the most imperiled group of organisms in the world, however, not much was known of the mollusk fauna in the Shawnee National Forest in southern Illinois. Our objective was to compile a list of historical and extant mollusks known from the western half of the area. Our data show 52 mollusk species are known from the western portion of the Shawnee National Forest and surroundings areas, including 23 native bivalves, one nonindigenous bivalve, six native aquatic snail species, and 55 native terrestrial snails.U.S. Forest Service Shawnee National Forest,unpublishednot peer reviewedOpe

Interlayer tunneling in counterflow experiments on the excitonic condensate in quantum Hall bilayers

The effect of tunneling on the transport properties of} quantum Hall double layers in the regime of the excitonic condensate at total filling factor one is studied in counterflow experiments. If the tunnel current $I$ is smaller than a critical $I_C$, tunneling is large and is effectively shorting the two layers. For $I > I_C$ tunneling becomes negligible. Surprisingly, the transition between the two tunneling regimes has only a minor impact on the features of the filling-factor one state as observed in magneto-transport, but at currents exceeding $I_C$ the resistance along the layers increases rapidly

Hyperfine Structure in the Rotational Spectrum of GaBr

The hyperfine structure of the rotational transition J = 2 ← 1 in the vicinity of 9.8 GHz was measured. The analysis yielded the following quadrupole coupling constants: e qv Q (79Br)= 105.78(34) + 0.92(38) (υ +1/2) MHz, e qv Q (81Br) = 88.55 (35) + 0.60 (32) (υ +1/2) MHz, e qv Q (69Ga) = − 86.68 (30) + 0.36 (24) (υ +1/2) MHz, e qv Q (71Ga) = − 54.58 (25) MHz. These results are consistent with systematic trends in the group of (III a/VII a) -compounds and remove some discrepencies in the literature. © 1978, Walter de Gruyter. All rights reserved

The electronic system (2)2Σ+(2)^2\Sigma^+ and (1)2Π(1)^2\Pi of LiCa

High resolution Fourier transform spectroscopy and Laser induced fluorescence has been performed on LiCa in the infrared spectral range. We analyze rovibrational transitions of the $(2)^2\Sigma^+$--$X(1)^2\Sigma^+$ system of LiCa and find the $(2)^2\Sigma^+$ state to be perturbed by spin-orbit coupling to the $(1)^2\Pi$ state. We study the coupled system obtaining molecular parameters for the $(2)^2\Sigma^+$ and the $(1)^2\Pi$ state together with effective spin-orbit and spin-rotation coupling constants. The coupled system has also been evaluated by applying a potential function instead of rovibrational molecular parameters for the state $(2)^2\Sigma^+$. An improved analytic potential function of the $X(1)^2\Sigma^+$ state is derived, due to the extension of the observed rotational ladder.Comment: 15 pages, 4 figures 2 supplement file

Creation of a dipolar superfluid in optical lattices

We show that by loading a Bose-Einstein condensate (BEC) of two different atomic species into an optical lattice, it is possible to achieve a Mott-insulator phase with exactly one atom of each species per lattice site. A subsequent photo-association leads to the formation of one heteronuclear molecule with a large electric dipole moment, at each lattice site. The melting of such dipolar Mott-insulator creates a dipolar superfluid, and eventually a dipolar molecular BEC.Comment: 4 pages, 2 eps figure