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AbstractAbstract
[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.)
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Nuclear Instruments and Methods; ISSN 0029-554X;
; v. 177(2/3); p. 305-308

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Bardin, C.; Duclos, J.; Magnon, A.
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Dept. de Physique Nucleaire1979
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Dept. de Physique Nucleaire1979
AbstractAbstract
[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
[fr]
On a entrepris a Saclay la mesure du taux de capture du muon par le proton, en comparant les temps de vie des muons positifs et negatifs dans l'hydrogen liquide. La precision finale visee sera d'environ 3x10-5. On utilise pour cela la structure temporelle de l'ALS (impulsions de 3 μs, a une frequence de 3000 Hz) qui permet des mesures de duree de vie apres l'impulsion de faisceau dans des conditions tres favorables. Un appareillage a ete concu pour cette experience. Une analyse tres preliminaire donne pour le taux de capture des muons lies dans l'etat pμp: lambdasub(c) (pμp)=472+-45 s-1Original Title
Mesure du taux de capture du muon dans l'hydrogene liquide
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1979; 6 p; 5. Biennial session on nuclear physics; Aussois, France; 5 - 6 Mar 1979
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AbstractAbstract
[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
[fr]
La cible est decrite telle qu'elle est realisee; les mesures de bruit de fond necessaires ne pouvant etre faites, une nouvelle cible est envisagee dont les principales caracteristiques sont donneesOriginal Title
Realisation d'une cible d'hydrogene liquide a Saturne
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Laboratoire National Saturne, Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France); 748 p; ISBN 2-7272-0085-4;
; 1983; p. 663-666; Commissariat a l'Energie Atomique; Saclay (France); 3. Saturne meeting; Fontevraud (France); 25-29 Apr 1983; Available from Laboratoire National Saturne, CEN Saclay, 91 - Gif-sur-Yvette (France)

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AbstractAbstract
[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)
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Istituto Nazionale di Fisica Nucleare, Rome (Italy). Sezione Sanita; 654 p; ISBN 3-211-82343-3;
; 1992; p. 95-104; Springer-Verlag/Wien; Wien (Austria); 13. European conference on few-body problems in physics; Elba (Italy); 9-14 Sep 1991

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AbstractAbstract
[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
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6. International symposium on high energy spin physics; Marseille (France); 12-19 Sep 1984
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AbstractAbstract
[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
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11. international symposia on high energy spin physics and polarization phenomena in nuclear physics; Bloomington, IN (United States); 15-22 Sep 1994; CONF-9409103--
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AbstractAbstract
[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
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1993 joint meeting of the American Physical Society and the American Association of Physics Teachers; Washington, DC (United States); 12-15 Apr 1993; CONF-9304297--
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AbstractAbstract
[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 xk (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-bari,k ∼ F(xk, z-bari) for all i = 1, . . . ,m and k = 1, . . . , n. In our case z-bari ∈ [100, 105], i = 1, . . . ,m and xk ∈ [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 Cj(z)xj, (17) where Cj(z) = Σq l=0 dl,jzl (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.
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1 ref.
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AbstractAbstract
[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
[ru]
Original Title
Avtonomnaya zhidkovodorodnaya mishen'
Source
AN Ukrainskoj SSR, Kharkov. Fiziko-Tekhnicheskij Inst; Voprosy atomnoj nauki i tekhniki; no. 1(11); p. 62-63; 1980; p. 62-63; Electromagnetic hadron interactions in resonance energy range; Kharkov, Ukrainian SSR; 30 May - 1 Jun 1979; 7 refs.
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Jonkmans, G.; Armstrong, D.S.; Azuelos, G.
TRIUMF, Vancouver, BC (Canada)1994
TRIUMF, Vancouver, BC (Canada)1994
AbstractAbstract
[en] We report the observation of the elementary process μ-p → nνμγ at TRIUMF. (author). 5 refs., 1 fig
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Sep 1994; 2 p; 5. International conference on the intersections of particle and nuclear physics; St. Petersburg, FL (United States); 31 May - 6 Jun 1994
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