421 research outputs found

    Letter from Attorney General Langer to E. H. Tostevin Regarding Minors in a Pool Hall in Tower City, March 25, 1920

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    In this letter, dated March 25, 1920, from North Dakota (ND) Attorney General William Langer to ND State Pool Hall Inspector Earle H. Tostevin, Langer requests an investigation of the White Front Pool Hall in Tower City, ND, citing a complaint from Mrs. E. J. Hagen that minors are being allowed inside the pool hall. See also: Letter from William Langer to E. H. Tostevin Regarding Pool Hall License in Tower City, April 5, 1920https://commons.und.edu/langer-papers/1344/thumbnail.jp

    Letter from Attorney General Langer to E. H. Tostevin Requesting Investigation of a Liquor Law Violation in Litchville, October 29, 1919.

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    In this letter, dated October 29, 1919, from North Dakota (ND) Attorney General William Langer to ND State Pool Hall Inspector Earle H. Tostevin Langer requests that Tostevin do everything he possibly can regarding liquor, gambling and cigarette violations in Litchville, North Dakota. Langer includes the text of a letter from Ole J. Belling, Justice of the Peace in Litchville, claiming a current pool hall is in violation of the liquor law along with gambling and the sale of cigarettes. Belling adds that another pool hall is being erected by a gambler and booze fighter, and the license of this pool hall should be rejected.https://commons.und.edu/langer-papers/1340/thumbnail.jp

    Sixth Year Medical Students

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    Mounted sepia photograph. Photographer: E. Ziegler, 42 Elizabeth Street, Norwood. Back row: J. S. Kessel, A. W. Welch, A. J. Lewis. Middle row: R. T. Binns, F. L. Thyer, J. R. Cornish, A. L. Tostevin, F. B. Leditschke, G. H. Howard. Front row: W. R. Angus, F. R. Wicks, H. McI. Birch, H. C. Hosking, D. A. Dowling, R. J. De N. Souter, L. D. Cowling

    1922-23 General Committee

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    BACK: C E Willing, L C Maiden, H M Rees, A E Leidig, H G Prest MIDDLE: R D Hornabrook, R O Fox, J D Finey, Miss L E Morris, A H Hennessy. A L Tostevin, Gillman FRONT: A B Barker, A S Cocks, C T Madigan, D A Dowling, H M Birch, M V Samuel, L D Cowlin

    Nuclear reactions used to probe the structure of nuclei far from stability

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    The study of nucleon pairing phenomena and of nucleon pair correlations, particularly in very neutron-rich or neutron-deficient exotic nuclei, is of considerable interest. This paper begins to address the capabilities of fast two-nucleon knockout reactions to make a positive contribution to such studies. Specifically, we address the sensitivity of two-nucleon knockout partial reaction cross sections (and the associated momentum distributions of the reaction residues), measured by the combination of particle and coincident gamma-ray detection, to the details of (a) nuclear structure models (here the large-basis shell model), (b) the removed nucleons' wave function configurations, and their ability to investigate nucleon pair-correlations in exotic nuclei. We do this by combining recent theoretical and experimental developments

    Reaction spectroscopy at fragmentation beam energies – recent advances in studies of two-nucleon removal

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    Final-state-exclusive two-nucleon removal reaction data from fast fragmentation beams can provide a demanding test of the microscopic two-nucleon transition densities calculated from large-basis shell model wave functions. The sensitivity of measured partial cross sections to pairing and other correlations is discussed. It is also suggested that the widths of the momentum distributions of these partial cross sections will exhibit a strong dependence on the final-state of the residue and the projectile structure

    One-neutron pickup into Ca 49: Bound neutron g9/2 spectroscopic strength at N=29

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    The highly selective, intermediate-energy heavy-ion-induced neutron-pickup reaction, in combination with γ-ray spectroscopy using the γ-ray energy-tracking in-beam nuclear array (GRETINA), is shown to provide reliable relative spectroscopic strengths for high-ℓ orbitals in nuclei more neutron rich than the projectile. The reaction mechanism gives a significant final-state-spin alignment that is validated through γ-ray angular-distribution measurements enabled by the position sensitivity of GRETINA. This is the first time that γ-ray angular distributions could be extracted from a high-luminosity, fast-beam reaction other than inelastic scattering. This holds great promise for the restriction and assignment of Jπ quantum numbers in exotic nuclei. We advance this approach to study the crucial N=28 shell closure and extract the ratio g9/2:f5/2 of bound neutron single-particle strengths in Ca49, a benchmark for emerging multi-shell ab initio and configuration-interaction theories that are applicable along the Ca isotopic chain
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