Abstract
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–neutrinoangular correlation in the radioactive decay of short-lived 6He. The facility consists of a 14 MeV d+t neutron generator to produce atomic 6He, 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 ∼7 × 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. 6He, for the precision measurement. The production rate of 6He atoms in the present setup has been estimated to be ∼1.45×10−4 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 language | American English |
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Pages (from-to) | 16-21 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 899 |
DOIs | |
State | Published - 11 Aug 2018 |
Bibliographical note
Funding Information:The authors would like to acknowledge the support from the Israel Science Foundation (ISF) grant 139/15 , the European Research Council (ERC) grant 714118 , the PAZY Foundation and the IAEC cooperation fund .
Publisher Copyright:
© 2018 Elsevier B.V.
Keywords
- Electron beam ion source
- Electrostatic ion beam trap
- GEANT4
- He radioactive atom
- Scintillator