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Title: The Munich Accelerator for Fission Fragments MAFF

Abstract

The layout and status of MAFF at the Munich high flux reactor FRM-II is described. At MAFF 1014 fissions/s will be induced by thermal neutrons in a target with approx. 1 g of 235U. The situation is compared to the SPIRAL2 facility where 1014 fissions/s are expected by fast neutron fission in a target containing 5100 g of 238U. A comparison of the yields of SPIRAL2 and MAFF is performed to show the complementarity of the two ISOL-facilities for fission fragments. MAFF has approximately five times the beam intensities of SPIRAL2 for short-lived fission isotopes with lifetimes shorter than 5 s and thus will focus on the most neutron-rich nuclei, while SPIRAL2 has better perspectives for the more intense, less neutron-rich post-accelerated beams.A problem that also deserves attention is the production of {alpha} emitters, in particular plutonium. Here MAFF has the advantage to contain the Pu-producing 238U only as impurity not as the main fissile system. If SPIRAL2 would use 235U instead of 238U this problematic issue could be avoided at the cost of a further reduction in intensity of very neutron-rich fission fragments by a factor of 10. Finally new physics close to the classically doubly-magic nuclei 78Ni andmore » 132Sn is described.« less

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2]; ; ; ; ;  [3];  [2]; ;  [4]; more »;  [5] « less
  1. LMU Munich, Department f. Physik, Am Coulombwall 1, 85748 Garching (Germany)
  2. (Germany)
  3. TU Munich, Physik-Department E12, 85748 Garching (Germany)
  4. Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching (Germany)
  5. TU Munich, ZWE FRM-II, 85748 Garching (Germany)
Publication Date:
OSTI Identifier:
20719743
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 802; Journal Issue: 1; Conference: ENS'05: International symposium on exotic nuclear systems, Debrecen (Hungary), 20-25 Jun 2005; Other Information: DOI: 10.1063/1.2140620; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACCELERATORS; FAST NEUTRONS; FISSION; FISSION FRAGMENTS; FRM-II REACTOR; MAGIC NUCLEI; NEUTRON-RICH ISOTOPES; NICKEL 78; PLUTONIUM; RADIOACTIVE ION BEAMS; THERMAL NEUTRONS; TIN 132; URANIUM 235; URANIUM 238

Citation Formats

Habs, D., Gross, M., Assmann, W., Beck, L., Grossmann, R., Maier, H.-J., Schumann, M., Sewtz, M., Szerypo, J., Thirolf, P.G., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Kruecken, R., Faestermann, T., Maier-Komor, P., Nebel, F., Zech, E., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Hartung, P., Stoepler, R., Juettner, Ph., and Tralmer, F.L. The Munich Accelerator for Fission Fragments MAFF. United States: N. p., 2005. Web. doi:10.1063/1.2140620.
Habs, D., Gross, M., Assmann, W., Beck, L., Grossmann, R., Maier, H.-J., Schumann, M., Sewtz, M., Szerypo, J., Thirolf, P.G., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Kruecken, R., Faestermann, T., Maier-Komor, P., Nebel, F., Zech, E., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Hartung, P., Stoepler, R., Juettner, Ph., & Tralmer, F.L. The Munich Accelerator for Fission Fragments MAFF. United States. doi:10.1063/1.2140620.
Habs, D., Gross, M., Assmann, W., Beck, L., Grossmann, R., Maier, H.-J., Schumann, M., Sewtz, M., Szerypo, J., Thirolf, P.G., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Kruecken, R., Faestermann, T., Maier-Komor, P., Nebel, F., Zech, E., Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching, Hartung, P., Stoepler, R., Juettner, Ph., and Tralmer, F.L. Mon . "The Munich Accelerator for Fission Fragments MAFF". United States. doi:10.1063/1.2140620.
@article{osti_20719743,
title = {The Munich Accelerator for Fission Fragments MAFF},
author = {Habs, D. and Gross, M. and Assmann, W. and Beck, L. and Grossmann, R. and Maier, H.-J. and Schumann, M. and Sewtz, M. and Szerypo, J. and Thirolf, P.G. and Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching and Kruecken, R. and Faestermann, T. and Maier-Komor, P. and Nebel, F. and Zech, E. and Maier-Leibnitz-Labor f. Kern- und Teilchenphysik, Am Coulombwall 6, 85748 Garching and Hartung, P. and Stoepler, R. and Juettner, Ph. and Tralmer, F.L.},
abstractNote = {The layout and status of MAFF at the Munich high flux reactor FRM-II is described. At MAFF 1014 fissions/s will be induced by thermal neutrons in a target with approx. 1 g of 235U. The situation is compared to the SPIRAL2 facility where 1014 fissions/s are expected by fast neutron fission in a target containing 5100 g of 238U. A comparison of the yields of SPIRAL2 and MAFF is performed to show the complementarity of the two ISOL-facilities for fission fragments. MAFF has approximately five times the beam intensities of SPIRAL2 for short-lived fission isotopes with lifetimes shorter than 5 s and thus will focus on the most neutron-rich nuclei, while SPIRAL2 has better perspectives for the more intense, less neutron-rich post-accelerated beams.A problem that also deserves attention is the production of {alpha} emitters, in particular plutonium. Here MAFF has the advantage to contain the Pu-producing 238U only as impurity not as the main fissile system. If SPIRAL2 would use 235U instead of 238U this problematic issue could be avoided at the cost of a further reduction in intensity of very neutron-rich fission fragments by a factor of 10. Finally new physics close to the classically doubly-magic nuclei 78Ni and 132Sn is described.},
doi = {10.1063/1.2140620},
journal = {AIP Conference Proceedings},
number = 1,
volume = 802,
place = {United States},
year = {Mon Nov 21 00:00:00 EST 2005},
month = {Mon Nov 21 00:00:00 EST 2005}
}