A(6)He production facility and an electrostatic trap for measurement of the beta-neutrino correlation

I. Mukul, M. Hass, O. Heber, T. Y. Hirsh, Y. Mishnayot, M. L. Rappaport, G. Ron, Y. Shachar, S. Vaintraub

Research output: Contribution to journalArticlepeer-review


A novel experiment has been commissioned at the Weizmann Institute of Science for the study of weak interactions via a high-precision measurement of the beta-neutrino angular correlation in the radioactive decay of short-lived(6)He. The facility consists of a 14 MeV d + t neutron generator to produce atomic(6)He, followed by ionization and bunching in an electron beam ion source, and injection into an electrostatic ion beam trap. This ion trap has been designed for efficient detection of the decay products from trapped light ions. The storage time in the trap for different stable ions was found to be in the range of 0.6 to 1.2 s at the chamber pressure of similar to 7 x 10(-10) mbar. We present the initial test results of the facility, and also demonstrate an important upgrade of an existing method (Stora et al., 2012) for production of light radioactive atoms, viz.He-6, for the precision measurement. The production rate of(6)He atoms in the present setup has been estimated to be similar to 1.45 x 10(-4) atoms per neutron, and the system efficiency was found to be 4.0 +/- 0.6%. An improvement to this setup is also presented for the enhanced production and diffusion of radioactive atoms for future use.

Original languageEnglish
Pages (from-to)16-21
Number of pages6
JournalNuclear Instruments & Methods In Physics Research Section A-Accelerators Spectrometers Detectors And Associated Equipment
StatePublished - 11 Aug 2018


  • Electron beam ion source
  • Electrostatic ion beam trap
  • GEANT4
  • He radioactive atom
  • Scintillator

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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