6533b85bfe1ef96bd12bb394
RESEARCH PRODUCT
A swept-current magnetic lens plus Si(Li) electron spectrometer with simultaneous momentum and energy selection
R. JulinM. LuontamaJ. KanteleA. Passojasubject
Materials scienceElectron spectrometerSpectrometerbusiness.industryContinuous spectrumGeneral MedicineElectronNanosecondlaw.inventionLens (optics)MomentumOpticslawMagnetic lensbusinessdescription
Abstract A combined swept-current magnetic lens plus Si(Li) electron spectrometer with simultaneous momentum and energy selection is presented. The spectrometer is intended for in-beam measurements of conversion electron lines up to several MeV in energy and for nanosecond lifetime determinations, as well as for off-beam studies of continuous beta-ray spectra and conversion lines from short-lived activities. The sweeping of the lens current is automatized and the energy selection, synchronously with the momentum, is performed using a simple digital window arrangement. The performance of the spectrometer is demonstrated in conversion electron and continuous spectrum measurements. Different versions of the system are considered, including fixed-current and high-efficiency modes of operation. The spectrometer features great versatility, good energy resolution, improved line shape, moderate transmission and low background. Easy methods of energy and efficiency calibration, and of tuning the spectrometer, are described.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1975-12-01 | Nuclear Instruments and Methods |