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[en] The problems are discussed of investigation into the solar wind in high-apogee satellites of the Prognoz series. The measuring procedure and plasma spectrometers characteristics are presented. The study principal results are briefly reported

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[en] The paper is aimed at the description of the newly developed Moessbauer spectrometer MsAa-3. The spectrometer MsAa-3 consists of a high quality γ--ray spectrometer including either a proportional gas detector head or a scintillation detector head, a transducer driving system including the transducer, data storage system, and data communication system based on the TCP/IP protocol. Additionally, the Michelson-Morley interferometer is provided for precise calibration of the transducer velocity. The spectrometer is equipped with an integrated simple temperature controller. All the essential functions are remotely controlled over the TCP/IP link allowing for the spectrometer set-up as the stand-alone unit in the computer network, e.g. on the Internet. External γ-ray detectors or external complete nuclear blocks could be used as well. The spectrometer is equipped with software allowing for setting all the functions, to perform on-line control, and retrieve data. The Moessbauer data processing software MOSGRAF is enclosed as well. The latter software allows for the calculation of the variety of velocity reference functions. (authors)

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[en] The conditions of achievement a high resolving power of depth selective conversion electron Moessbauer spectroscopy (DS CEMS) method on combined facility beta-spectrometer - nuclear gamma resonance spectrometer are obtained. The essential step in the method progressing is made at its realization on a magnetic sector beta-spectrometer with double focusing, equipped with electrons source (sample) of a large area and position-sensitive detector. The symmetrical variant of a magnetic sector beta-spectrometer allowing to realize possibilities of the method more completely is presented. (author)

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[en] This experiment was motivated by studying short-range nucleon-nucleon correlations via multinucleon knockout reactions?(e, e?pN). The data were taken in Hall A at Jefferson Lab using the pair of high resolution spectrometers to detect the (e, e?p)reaction data, and using a third large acceptance spectrometer called BigBite to detect the second nucleon ejected from the nucleus. The kinematics were chosen to be conducive for studying short-range correlations?namely a large momentum transfer and xB > 1. The central kinematic values used during the experiment were Q2 = 2 (GeV/c)2 and xB = 1.2, although the spectrometer acceptances resulted in a range of both Q2 and xB being recorded in the data. While the electron spectrometer was unchanged during the experiment, the proton spectrometer was changed to cover a range of missing momentum values, ∼Pm ? 200 ? 650 MeV/c; this resulted in three different datasets. This thesis presents the analysis and results of the (e, e?p) reaction channel.

[en] Most types of magnetic gamma-ray spectrometers are much less used than they were ten or fifteen years ago largely because of the increased use of solid-state detectors. The latter permit much greater rates of data accumulation and, in many cases, better resolutions than the former. Many of the best magnetic instruments have been discarded or dismantled. Pair and Compton spectrometers are no exception of this trend. Thus much of the material to be considered reviewed by the authors must be of an historical nature. Inclusion of a brief account of magnetic pair and Compton spectrometers may be useful, not only for historical completeness, but also to suggest circumstances in which these spectrometers may still have advantages. (Auth.)