High resolution148Nd(3He,nγ) two proton stripping reaction and the structure of the 02+state in150Sm

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

doi:10.1051/epjconf/20146602116

Abstract

1 , O. Shirinda 3 , P. Abstract. 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 150 Sm which, with the 02 + state in 100 Ru, are the only two excited states observed in 2β2ν double β-decay.

Highlights

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
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
The 02+ state at 740 keV in the N=88 nucleus 150Sm is one of only two excited states observed [1] in 2β2ν double β-decay

Summary

Introduction

The 02+ state at 740 keV in the N=88 nucleus 150Sm is one of only two excited states observed [1] in 2β2ν double β-decay. 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.

Results

Conclusion