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The emission of prompt neutrons from the spontaneous fission of 252No and 244Fm

  • A. I. SvirikhinEmail author
  • A. V. Andreev
  • V. N. Dushin
  • M. L. Chelnokov
  • V. I. Chepigin
  • M. Gupta
  • A. V. Isaev
  • I. N. Izosimov
  • D. E. Katrasev
  • A. N. Kuznetsov
  • O. N. Malyshev
  • S. Mullins
  • A. G. Popeko
  • E. A. Sokol
  • A. V. Yeremin
Regular Article - Experimental Physics

Abstract

The neutron detector with 3He -filled counters placed in the focal plane of the VASSILISSA separator is used for measuring the average number and determining the multiplicity distribution of prompt neutrons from the spontaneous fission of heavy short-lived isotopes. The test reaction \(\ensuremath \mathrm{{}^{48}Ca}+\mathrm{{}^{206}Pb}=2{\rm n}+\mathrm{{}^{252}No}\) is used for tuning the separator settings and calibrating the detector system with the spontaneous fission of the 252No . The average neutron number per 252No spontaneous fission event is as large as \(\ensuremath \bar{\nu}=4.06 \pm 0.12\) . The short-lived heavy isotope 244Fm , produced in the complete fusion reaction 40Ar + 206Pb , is investigated. The average number of neutrons per spontaneous fission of 244Fm from the experimental data ( \(\ensuremath \bar{\nu}=3.3 \pm 0.3\) is determined for the first time.

Keywords

206Pb Neutron Detector Multiplicity Distribution Evaporation Residue Spontaneous Fission 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • A. I. Svirikhin
    • 1
    Email author
  • A. V. Andreev
    • 2
  • V. N. Dushin
    • 3
  • M. L. Chelnokov
    • 1
  • V. I. Chepigin
    • 1
  • M. Gupta
    • 4
  • A. V. Isaev
    • 1
  • I. N. Izosimov
    • 1
  • D. E. Katrasev
    • 1
  • A. N. Kuznetsov
    • 1
  • O. N. Malyshev
    • 1
  • S. Mullins
    • 5
  • A. G. Popeko
    • 1
  • E. A. Sokol
    • 1
  • A. V. Yeremin
    • 1
  1. 1.Flerov Laboratory of Nuclear ReactionsJINRDubnaRussia
  2. 2.Bogoliubov Laboratory of Theoretical PhysicsJINRDubnaRussia
  3. 3.V.G. Khlopin Radium InstituteSt. PetersburgRussia
  4. 4.Manipal UniversityManipalIndia
  5. 5.Laboratory for Accelerator-Based SciencesSomerset WestSouth Africa

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