Electron spectrometer for “in-beam” spectroscopy

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“…The thickness of the target was chosen as a compromise between energy straggling of electrons in the target material at energies corresponding to transitions of interest (300 ÷ 1000 keV) and total production rate for 130 Ba nuclei. The EAGLE array of 12 HPGe ACS detectors [9] was coupled to the electron spectrometer [10] for γ-γ and γ-e measurements. The distance between HPGe detector collimators and the target was equal to about 8 cm in average.…”

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

“…Comparison of these values with theoretically predicted ones from the BrIcc code 22 sition is E2/M1 one with a mixing parameter δ 2 (E2/M1) = 1.3 (9). The E3 multipolarity, although α K (exp) ≈ α K (theory) (E3) is ruled out because of the low intensity of the L-electron peak.…”

“…In both constructions permanent magnets were used for selection and transportation of electrons. Our first spectrometer 9,13 for e-γ measurements was successfully used in several experiments, [9][10][11] but its efficiency for "in-beam" studies was not satisfactory. We, therefore, constructed a new spectrometer where the advantages of both magnetic field configurations were again exploited incorporating at the same time several new solutions.…”

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“…The transportation field is produced by a set of permanent magnets in a form of coaxial rings. The separation of electrons from positrons is possible by using permanent magnets of quasi-mini-orange form [1]. The electron spectrometer was equipped in the new 12-segmented Si(Li) detector manufactured by Dr. W. Czarnacki and his team at the National Centre for Nuclear Research.…”

“…The magnetic internal conversion electron spectrometer was designed and constructed at the University of Lodz [1]. The main goal to build this kind of device was to determine multipolarity of excited states of atomic nuclei, especially observation of E0 transitions.…”