An electron scintillation detector with good energy resolution

Detector Characterization for Accurate Monte Carlo Simulation and Neutron Energy-spectrum Unfolding

“…Equation ( 2) [5,16,17] is a conventional parameterization, where α is attributed to position-dependent light transmission between the scintillator and the photocathode, β accounts for the statistical nature of the photon production and attenuation of light in the scintillator (including the quantum efficiency and electron amplification of the PMT), and γ is due to the electronic noise of the PMT and waveform digitizer [6]. The measured resolutions and light outputs corresponding to the gamma-ray sources mentioned in the previous section were fit to equation 4.…”

Conversion Probability of the 35 keV Transition in 125Te

“…For the coincidence measurements according t o the method of ref. [2] a double lens spectrometer [4] and a time analysing system were used [5]. The two spectrometer lenses were adjusted to accept the KLL-Auger electron group and one of the conversion electron lines from the 109 keV isomeric transition, respectively.…”

Lifetimes of the first excited states in Tm169, Tm171, and Cs134

“…Electronic energy discrimination can also be used with electrons directly incident on a scintillator or solid-state device) however, much better energy resolution (< 5% in momentum) is possible by use of magnetic-spectrometer energy selection between the source and one or both detectors in delayed-coincldence measurements (33^34, 35,36,37,38). In some cases such energy resolution is necessary to eliminate unwanted coincidences associated with close-lying transitions originating from different nuclear states and is capable of providing the most un ambiguous results when knowledge of the decay scheme is incomplete.…”

“…Magnetic spectrometers do have the disadvantages of considerably reducing the geometrical efficiency (a few % of 4jt) and increasing the time dispersion due to spectrometer path length differences. In some cases it is necessary to use light pipes (25,34,36,37 ) between the scintil lator and photomultipiier to avoid magnetic interference with photomultiplier operation and this can also increase the time dispersion. (In (c) two methods of time calibration are represented schematically.…”