[en] In order to measure the muon capture rate by the proton, a 7.7 l target of ultra-pure hydrogen was built in Saclay. The target is filled with deuterium-free hydrogen (protium). The required level of Z > 1 impurities is 10^-8. This is obtained by properly evacuating the target during one week and running the protium through a hot silver-palladium cell. (orig.)

[en] An experiment is in progress at Saclay to measure the muon capture rate on the proton, by comparing the lifetimes of positive and negative muons stopping in liquid hydrogen, with a final accuracy about 3x10^-5. The beam structure of Saclay's linac (3 μs bunches at a rate of 3000 s^-1) is used which allows the lifetime measurement after the burst in very favourable conditions. An apparatus has been designed. The result of a very preliminary analysis gives for the capture rate of muons bound in the pμp system: lambdasub(c) (pμp)=472+-45 s^-1

[en] The realized target is described; as the necessary ground noise measurements cannot be made on this target a new target is considered, the principal characteristics of which are given

[en] In the light of the interest raised by the strangeness content of the proton, some questions posed by the theoretical description of kaon photo- and electro-production and by the available data are addressed. (authors)

[en] Over the last few years there has been a strong interest in the development of improved materials for polarized targets. A new material has now been developed: dynamically polarized ammonia and a large proportion of the presentations made at this meeting were concerned in some way with its preparation, properties or operational characteristics. Results from tests on some other new dynamically polarized materials were also given, together with data and reviews on other possible techniques including the use of polarized atomic hydrogen in the form of a beam or a stabilised gas. Brief review of this workshop on these subjects is made here

[en] NEPTUN-NEPTUN-A is a polarized experiment at Accelerating and Storage Complex (UNK, IHEP) with two internal targets. Status of the atomic beam polarized target that is being developed at the Joint Institute for Nuclear Research, Dubna is presented. copyright 1995 American Institute of Physics

[en] To study spin effects in high energy p-p collision in the 600 GeV UNK accelerator the authors are developing an ultra-cold high density jet target of proton-spin-polarized hydrogen beam. Progress on the gas jet target is presented. The authors describe the performance and the present status of components of the jet

[en] Complete text of publication follows without table. Mathematics is the universal language of all natural sciences, in particular of the theoretical physics. Since the same mathematical problem, e.g. for example the smoothing of either the measured or calculated data can appear in various fields of sciences. In this work the angular differential electron elastic cross sections of hydrogen atoms for a wide range of incident electron energy and in the entire angular range were calculated using the code described in Ref. [1], where the partial expansion method is applied to obtain cross sections. The aim of the present work was to develop a universal functional from of elastic cross sections for the case of hydrogen target. We have the following system of three column 'block' basic points which comes from cross section calculations. This means that we have m blocks and each block has the same x_k (k = 1, . . . , n) basis points. Our sample is made up m x n triples. We would like to fit our sample with a two variables continuous y-bar = F(x, z-bar) function using the method of least squares. For that we require that y-bar_i,k ∼ F(x_k, z-bar_i) for all i = 1, . . . ,m and k = 1, . . . , n. In our case z-bar_i ∈ [10⁰, 10⁵], i = 1, . . . ,m and x_k ∈ [0 deg, 180 deg], k = 1, . . . , n and m = 201, n = 251. According to our fitting procedure the best fit function y = F(x, z) is given as: F(x, z) = Σp j=0 C_j(z)x^j, (17) where C_j(z) = Σq l=0 d_l,jz^l (j = 0, . . . , p). (18). Fig. 1 shows the elastic cross sections at 100 eV and 10 keV to verify the goodness of our universal functional form. Acknowledgements. This work, supported by the European Communities under the contract of Association between EURATOM-HAS, was carried out within the framework of the Task Force on Integrated Tokamak Modelling of the European Fusion Development Agreement.

[en] An autonomous liquid hydrogen target design on the base of the ChM-20B microrefrigerator intended for experiments of pion photoproduction at γ-quanta energy of about 1 GeV is described. The experiments on hydrogen liquefaction were carried out with the operating volumes made of duralumin and oxygen-free copper. In the first case during 5 h operation 20 cm³ of liquid hydrogen were obtained; in the second case after 1.5 h operation 60 cm³ of the cooling agent were condensed. The facility developed may also be applied to cooling systems in various devices of low cooling agent productivity when existence of the liquid phase of a cooling agent as a stabilizing temperature factor turns out to be efficient

[en] We report the observation of the elementary process μ^-p → nν_μγ at TRIUMF. (author). 5 refs., 1 fig