ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A test stand for development of ion sources for radioactive beams is currently being commissioned at Argonne. It is located at the Physics Division's Dynamitron accelerator which will be used as a neutron generator with a flux of up to 1011 neutrons per second created by reactions of 4 MeV deuterons on various targets with beam currents of up to 100 μA. The primary targets will be located adjacent to heated secondary targets inside an on-line ion source. With this neutron-generator facility it will be possible to produce radioactive beams of various isotopes, such as 6He, 24Na, and neutron-rich fission fragments. For example, with a secondary target of uranium carbide containing 25 g of natural or depleted uranium the yields of individual isotopes in the target will be about 107/s for isotopes such as 132Sn, 140Xe, and 142Cs, near the peak of the fission distribution. The ion sources to be evaluated will be located within a shielded cave with walls consisting of 30 cm of steel plus 60 cm of concrete to attenuate the prompt neutron radiation by a factor of about 104. Secondary beams of radioactive fission fragments with intensities on the order of 106/s per isotope will be extracted in the 1+ charge state at energies of 20 keV and mass separated with a Danfysik mass separator. Light isotopes, such as 6He and 24Na, can be produced via (n,α) and (n,p) reactions on appropriate target materials. Commissioning began with measurements of fission yields from primary targets of C, Be, BeO, and BN. A surface ionization source which is a variation of the one used in the TRISTAN on-line mass seperator facility at Brookhaven National Laboratory has been installed and tested with stable Rb and Cs beams. The isotope separator was also commissioned with these beams. The development program will include emittance measurements and source optimization, initially with stable beams, and target-delay-time and release-efficiency measurements for various target/secondary-beam systems. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 2322-2327 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Stripping efficiencies for Kr+, Xe+, and Pb+ beams in helium and nitrogen gas targets have been measured at energies varying between 0.8 and 2.0 MeV. The stripping yields were determined for different target densities, ranging from single-collision conditions to equilibrium. Based on these results, approximate predictions of the equilibrium charge state distributions for low velocity (v/c=0.0040–0.0060) heavy ions with 28〈Z〈92 in collisions with helium atoms are made. Furthermore, measurements of the small-angle scattering of these heavy ion beams in collisions with dilute helium and nitrogen gases are reported. The presented results are important in view of a proposed postacceleration scheme for low-energy radioactive ion beams using a linac. These data show that helium generally produces higher yields of 2+ and 3+ ions and that the optimal choice of gas thickness for the proposed application is somewhat less than that required for equilibrium. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A direct ion plasma sputtering effect has been observed in an electron cyclotron resonance ion source and developed into a reliable and simple method for producing ion beams from some solid materials. We describe the ion sputtering technique used with the Argonne Tandem Linac Accelerator System Positive Ion Injector Electron Cyclotron Resonance ion source to produce, to date, stable beams of nickel, silver, tellurium, gold, lead, and bismuth and present the results obtained in test cases. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Reactions with a heavy projectile incident on a light target can be used for the efficient in-flight production of secondary radioactive beams. An overview of this technique is given using data on 17F beams produced via the p(17O, 17F)n and d(16O, 17F)n reactions. With primary 16,17O beam currents of 100 pnA, intensities of up to 2×106 17F/s on target were achieved. Using this beam, the p(17F,α)14O reaction was measured. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 323-324 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A neon gas target has been developed to produce radioactive fluorine. Small CF4 impurities were added to the neon gas and the recovery efficiency of 18F-labeled CF4 has been measured as a function of the impurity level. Extraction efficiencies up to 90% have been obtained, which makes this technique to produce and extract radioactive fluorine from a production target a powerful method to generate intense radioactive 17F and 18F beams, using the 20Ne(p,α)17F and 20Ne(d,α)18F reactions, respectively. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    ISSN: 0066-4243
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A group including many ANL Physics Division staff and ATLAS outside users has discussed possibilities for research with radioactive ion beams and prepared a working paper entitled "Concept for an Advanced Exotic Beam Facility Based on ATLAS.'' Several subgroups have been working on issues related to ion sources and targets which could be used in the production and ionization of radionuclides with high power primary beams. Present activities include: (a) setting up an ion source test stand to measure emittances and energy spreads of ISOL-type ion sources, (b) experiments to evaluate methods of containing liquid uranium for production targets, (c) experimental evaluation of geometries for the generation of secondary neutron beams for production of radionuclides, (d) setting up an ISOL-type ion source at a neutron generator facility to measure fission fragment release times and efficiencies, and (e) computer simulations of an electron-beam charge-state amplifier to increase the charge states of 1+ secondary beams to 2, 3, or 4+. The present status of these projects and future plans are presented in this report. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...