A prototype of a 2D detector based on specially designed straw tubes with cathode data readout has been developed and tested. This detector exhibits comparable accuracies in measuring radial and longitudinal coordinates. Its rate capability is similar to the capabilities of traditional detectors whose tubes are smaller by half in diameter.

Precise measurement of straw axial coordinate (along the anode wire) with accuracy compatible with straw radial coordinate determination by drift time measurement and increase of straw detector rate capability by using straw cathode readout instead of anode readout are presented.

The possibilities of improving the light yield of lead tungstate (PbWO4) crystals (PWO) for application in experimental high-energy physics in the particle energy range from 10 MeV to tens of teraelectronvolts are considered. The results of investigations of the scintillation properties of PWO crystals, which were doped with La and Y ions, performed at low (−25°C) and room temperatures are presented.

The paper describes the Instrument Package MS-2000IP, which is based on some new technical ideas of the authors. It allows to increase essentially the productivity of Mössbauer measurements in transmission Mössbauer spectroscopy, in conversion X-ray Mössbauer spectroscopy (XMS), as well as in conversion electron Mössbauer spectroscopy (CEMS).

Energy-scale monitoring systems for scintillation detectors with various sources of standard light pulses are considered. A LED-based light-pulse generator with active quenching of afterglow, which can reduce the light-pulse duration by half, is described. The number of photons per pulse may amount to ∼10 9 or more, the pulse duration being 10 ns. A long-term (a few weeks) instability of the light-flash intensity is ± 0.1%.

The methods to increase the productivity (statistical quality) of Mössbauer measurements have been considered. Some fast detectors for gamma- and secondary radiation have been described. These detectors allow in many cases to essentially reduce the time for the Mössbauer spectra accumulation with a given productivity.

A traditional scintillation detector with NaI(Tl) crystal, proportional counter and a new scintillation detector using YAlO3(Ce) crystal and resonant scintillation detector are compared from the point of their productivity for transmission Mössbauer experiments.

A detector for low-energy conversion and Auger electrons used for CEMS are described. It is based on the registration of light pulses produced by microdischarges in rare air caused by electrons under the presence of an electric field. The main parameters of the proposed Air Scintillation Detector (ASD) are comparable with parameters of usual CEMS detectors. However, the contrary to standard detectors, the ASD allows to investigate samples of almost arbitrary shape and size. It extends the field of CEMS applications, in particular, for investigation of tribological problems.

A monitor for intermediate-energy charged particles comprising a Y3Al5O12:Ce scintillator and an epitaxial silicon detector is described. This detection system has a high charge resolution, provides the detection of particles within a wide range of energy, mass, and charge, and, as a consequence, allows a clear separation of the elastic scattering peak of ions bombarding the target. The investigation of the response of this scintillator showed that its light output, like that of other inorganic scintillators, decreases with increasing Z of the ion and depends linearly on the energy of ions from Be to N-14 in the energy range E greater than or equal to 10 MeV/A.

A method of joint treatment of Mössbauer and Röntgen data for measurement of tin concentration has been developed. It allows to minimize any errors caused by variation of sample structure and to obtain information on total and oxide tin content. The principle scheme of a Mössbauer tin concentratometer based on this method is described.

The characteristics of a crystal/photodetector system with long size lead-tungstate scintillator PbWO4 (PWO) were studied. The influence of different measurement conditions on the light yield and light yield homogeneity was investigated for electromagnetic calorimeter modules with projective geometry. We have tested different kinds of reflective materials for crystal covering such as MYLAR(mirror reflection) and MILLIPORE, TEFLON, TYVEK (diffuse reflection), using different shapes of crystals (as a parallelepiped, as a truncated pyramid, as double truncated pyramid), using light guides and/or reflecting covering at the bottom of crystal. In our investigation we have used a photomultiplier tube.

Two transducers with polyamide fibres as suspension brackets are described in this paper. The mini transducer uses barium ferrite magnets and its weight is 360 g, whereas the micro transducer uses SmCo5 magnets and its weight is 36 g. An integral nonlinearity of the velocity scale better than 0.07% was obtained in experiments with the mini transducer and 0.11% with the micro transducer. Both transducers have been in use since 1992.

Some traditional and new types of the detectors are compared from the point of view of their productivity for transmission Mossbauer measurements. The considerable advantage of a scintillation detector with a YAlO 3 : Ce crystal is shown. The results of comparative measurements are given.

Some traditional and new types of the detectors are compared from the point of view of their productivity for transmission Mössbauer measurements. The considerable advantage of a scintillation detector with a YAlO3: Ce crystal is shown. The results of comparative measurements are given.

A Mössbauer spectrometer with a mechanical drive system is described in this paper. The linearization of the velocity scale is realized by means of the “time-modulation” method of Mössbauer spectra registration. An integral nonlinearity of the velocity scale of 0.1% was obtained in experiments with a drive rod of 1.5 kg weight.

The physical basis of Mossbauer concentratometry with resonance detection of backscattered radiation has been considered. A basic analytical equation has been obtained and some of its consequences for tin dioxide measurements discussed. A Mossbauer concentratometer is briefly described.

The scintillation pulse-height spectra of YAlO3:Ce crystals when irradiated by different isotopes are presented. The optimum crystal thickness is almost-equal-to 0.35 mm, the detection efficiency is close to 80% at an energy of 14.4 keV, and the energy resolution with an FEU-85 photomultiplier is as high as 38%.