EPJ Web of Conferences (Apr 2014)

High resolution 148Nd(3He,nγ) two proton stripping reaction and the structure of the 02+ state in 150Sm

  • Sharpey-Schafer J. F.,
  • Papka P.,
  • Bvumbi S. P.,
  • Jones P. M,
  • Vymers P.,
  • Bucher T. D.,
  • Dinoko T. S.,
  • Easton J. L.,
  • Herbert M. S.,
  • Kheswa B. V.,
  • Khumalo N.,
  • Lawrie E. A.,
  • Lawrie J. J.,
  • Majola S. N. T.,
  • Ndayishimye J.,
  • Negi D.,
  • Noncolela S. P.,
  • Orce J. N.,
  • Shirinda O.,
  • Sithole P.,
  • Standkiewicz M.A.,
  • Wiedeking M.

DOI
https://doi.org/10.1051/epjconf/20146602116
Journal volume & issue
Vol. 66
p. 02116

Abstract

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The challenge of achieving high resolution in binary reactions involving an outgoing high energy neutron is solved by detecting the γ-ray decay of populated excited states in an array of escape suppressed HPGe detectors in coincidence with fast neutrons detected in a wall of scintillator detectors 2m down beam of the target. The selectivity of the arrangement is of the order of 1 in 1000. The time-of-flight difference is sufficient to separate fast neutrons from direct reactions from a large background of statistical neutrons from fusion-evaporation reactions. Our interest is in the wavefunction of the 02+ state at 740 keV in the N=88 nucleus 150Sm which, with the 02+ state in 100Ru, are the only two excited states observed in 2β2ν double β-decay.