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Tests of a large air-core superconducting solenoid as a nuclear-reaction-product spectrometer (1987)

Stern, R. L. ; Becchetti, F. D. ; Casey, T. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 58 (1987), S. 1682-1693

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: An air-core superconducting solenoid, with a diameter of 0.2 m and a length of 0.4 m, has been configured for use as a heavy-ion reaction-product spectrometer (E/A≤5 MeV/u) near θ=0 °. The spectrometer has a large solid angle (10–35 msr) and properties suitable for time-of-flight measurements with flight paths (approximately-greater-than) 2 m. The performance of the spectrometer was established using α-particle sources and nuclear-reaction products from heavy-ion collisions. The characteristics of air-core magnets are compared to those of steel-yoke magnets. The simplicity and ease of operation of the air-core magnet, without significant problems from the (axial) fringe fields, suggests that larger air-core magnets with dΩ≥20 msr and capable of focusing ions with E/A≥30 MeV/u are feasible. Other applications of solenoids and combinations of solenoids with radial electric-field lenses (ELCO lenses) are also discussed, including designs which focus more than one charge state simultaneously.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1139368

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Darstellung und spektroskopische Eigenschaften einiger Perbromierter und periodierter Oligosilane (1982)

Hassler, K. ; Kovar, D. ; Söllradl, H. ; [et al.]

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 488 (1982), S. 27-37

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ISSN: 0044-2313

Keywords: Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: Preparation and Spectroscopie Properties of Some Perbromo- and PeriodooligosilanesThe cleavage of octaphenylcyclotetrasilane and decaphenylcyclopentasilane with Iodine, phosphorus pentabromide and bromine and the successive reaction with HBr/AlBr3 or HI/AlI3 give n-Si4Br10, n-Si5Br12, n-Si4I10, and n-Si5I12. Their IR and Raman spectra are discussed with the aid of a normal coordinate analysis. The spectra of the cyclic iodosilanes Si4I8, Si5I10, and Si6I12, prepared previously [1], are included in the discussion.

Notes: Die Spaltung von Oktaphenylcyclotetrasilan und Dekaphenylcyclopentasilan mit Iod, Phosphorpentabromid oder Brom und anschließende Umsetzung mit HBr/AlBr3 bzw. HI/AlI3 erlaubt die Darstellung der bisher unbekannten Halogensilane n-Si4Br10, n-Si4I10, n-Si5Br12 und n-Si5I12. Ihre IR- und Raman-Spektren werden mit Hilfe einer Normalkoordinatenanalyse diskutiert. Jene der kürzlich dargestellten [1] cyclischen Iodsilane Si4I8, Si5I10 und Si6I12 werden mit einbezogen.

Additional Material: 7 Tab.