University of Lodz an electron spectrometer—A new conversion-electron spectrometer for “in-beam” measurements

Abstract

The designed and constructed at the University of Lodz an electron spectrometer is devoted to "in-beam" measurements. The apparatus is characterized by high efficiency up to 9%, good energy resolution (FWHM = 5 keV at 482 keV) and, what is very important good suppression of delta electrons, positrons, and photons emitted by the targets. This achievement was obtained using a combination of magnetic field in two different layouts: perpendicular and parallel to the axis of the spectrometer being orthogonal to the beamline. The conversion-electron spectrometer coupled to the EAGLE array was successfully tested in an "in-beam" measurement.

Decay of the Iπ=8− isomeric state in Nd134 and Perkowski1, Andrzejewski2, Droste3 et al. 2017Phys. Rev. CSelf Cite1010View full textAdd to dashboardCite

“…The background from δ electrons and γ rays is greatly reduced. A new version of the spectrometer University of Lodz an Electron SpEctrometer (ULESE) [20] was used in the 184 Pt experiment. The ULESE spectrometer is characterized by a very high efficiency, up to 9% at an energy of 300 keV, and good energy resolution, ≈1% at ∼500 keV for a thin calibration source and, which is very important, good suppression of δ electrons, positrons, and photons emitted by the targets.…”

Nuclear Physics Opportunities at European Small-Scale Facilities

“…Coincidences between gamma rays and internal conversion electrons enable the determination of transition multipolarities. The EAGLE array could be utilized in conjunction with the ULESE (University of Lodz Electron Spectrometer) [17] electron spectrometer to perform this type of measurement. High efficiency (up to 12% at 300 keV) and good energy resolution (1% at 1 MeV) characterize this electron spectrometer.…”

E0 transition strength in stable Ni isotopes

“…Comparing the experimental data available from the three most recent compilations, one finds that there are 447, 87 and 14 evaluated values reported for B(E2 : 2 + 1 → 0 + 1 ) [3], ρ 2 (E0 : 0 + 2 → 0 + 1 ) [4] and ρ 2 (E0 : 2 + 2 → 2 + 1 ) [2] transition strengths, respectively. These statistics are expected to change as there have been a number of advances and a rejuvenation of the detection systems being employed for electron and positron spectroscopy worldwide in recent years [5][6][7][8][9][10]. One area where data are still particularly lacking is a characterization of E0 transition strengths between states of J > 0 in spherical nuclei.…”