A frozen-spin- polarized deuteron target cooled by the 3He/4He dilution refrigerator is described. Fully deuterated 1,2-propanediol was used as a target material. Deuteron vector polarization about 40% was obtained for the target in the shape of a cylinder of 2-cm diameter and 6-cm length. The target is intended for a study of 3N interactions at the polarized neutron beam generated by the Van de Graaff accelerator at the Charles University in Prague.

The element distribution in the fruit body of a wood-rotting fungus was studied. Samples of Fomes fomentarius were collected in nature, together with bark and a piece of substrate wood. For PIXE analysis, slices were cut from the fruit body. The slices were analyzed using a proton beam at many points from the fruit body surface to the core, or across the fruit-substrate interface. The analysis was performed with an external proton beam in a low-pressure nitrogen atmosphere; 9-12 elements heavier than silicon were found above the limit of quantitation. Manganese showed interesting systematic behavior. The suitability and usefulness of PIXE analysis for studying the distribution of heavy elements in fruit bodies of wood-rotting fungi are discussed. Copyright (c) 2005 John Wiley & Sons, Ltd.

An experimental study was carried out on the neutron response functions of two neutron detector arrays consisting of 39 3He proportional counters with a polyethylene moderator for monoenergetic neutrons within the 0.39–1.54MeV neutron energy range. Experimental data on the sensitivity of neutron counting to a change in neutron energy and the influence of the thickness of polyethylene moderator were obtained. The experimental efficiency curves were compared with the calculated response functions generated by a neutron transport code.

The study of the neutron response and n–γ discrimination for small 18×26×8mm3 liquid scintillator BC501A (Bicron) detector was carried out by digital charge comparison method. Three ranges of neutron energies were used: uniform distribution from 0.95–1.23MeV, continuous spectra of AmBe source and monoenergetic 16.2MeV neutrons. The obtained results are compared with those of cylindrical liquid scintillation detector (40mm diameter, 60mm length) at the same energies of neutrons. A dramatic fall of the neutron response function at 400keVee for small detector at 16.2MeV neutron energy was measured. For 0.95–1.23MeV neutron energy range such fall takes place at 260keVee. The greater slope of neutron locus at 0.95–1.23MeV neutron energy compared to 16.2MeV for both detectors is explained by longer tail of pulse from proton recoils within 0.1–1.23MeV energy range.

The purpose of the project is to study three-nucleon interactions using 14-16 MeV polarized neutron beam in conjunction with polarized deuteron target. Spin dependent, total cross section differences Delta(sigmaL) and Delta(sigmaT) will be measured in the energy range where there are no experimental data, with sufficient accuracy to check the contribution of the three-nucleon forces. In the test run, the obtained deuteron vector polarizations have been P+ = (-39.5 +/- 2) % and P+ = (32.9 +/- 2) %. The proposed experiment is the continuation of the preceding measurements of the same quantities in the np scattering at the Van de Graaff accelerator of Charles University.

Application of an on-demand beam deflection system in PIXE analysis has numerous advantages. The suppression of pile-up is accomplished much better than by using pile-up rejection electronic circuits only. In the case of biological and other sensitive types of samples, it is important to minimize the radiation and thermal load. In the case of samples with very different concentrations, the need for beam current correction between sample analyses is not as critical. An on-demand beam deflection system for the analytical facility at the CTU in Prague has been developed and implemented. A pair of electrodes was inserted in the beam line in front of the target chamber. The electrodes are supplied with positive high voltage up to 1 kV and they are a U-shape cross-section to reduce their beam distortion effect. Temporarily, one of the electrodes is shorted to ground potential. The shorting, by a HEXFET® transistor, occurs in a period of about 100 ns after the edge of the triggering pulse. A description of the system as well as the results of the tests are presented.

In a spectroscopic study of non-irradiated and proton-irradiated silicon diodes, the detectors were illuminated from the front side and from the rear side by various alpha particle sources (mainly ThC') and by monoenergetic protons with energies from 1.0 to 2.5 MeV. Their response characteristics have been studied as a function of the incoming particle energy and the applied bias voltage. The charge collection efficiency was determined as a function of fluence. (C) 1999 Elsevier Science B.V. All rights reserved.

The paper describes calibration, laboratory Quality Assurance/Quality Control (QA/QC) program, and environmental applications of the Prague PIXE system. To detect, correct, and prevent problems in the measurement process, an intercalibration between the Ion Beam Laboratory of the Czech Technical University and the Aerosol Group at the Lund Institute of Technology has been carried out. Seventy-eight rural fine fraction air particulate samples collected on Nuclepore filters were analyzed first in Lund and then in Prague. In case of the most abundant trace elements like S, K, Ca, Fe, Zn, the comparison of elemental concentrations measured by the two laboratories revealed small random error and bias, which stayed below 10% of magnitude. The limits of detection obtained in Prague and in Lund were comparable and differed only slightly at extremes of low and high Z. Further applications of PIXE in Prague in environmental science are mentioned including characterizations of trace elements in lichens by an external beam.

A new measurement of Δσ L for longitudinally polarized neutrons transmitted through a polarized proton target at 16.2 MeV has been made. This complements our previous measurement of Δσ T at the same energy and after a phase-shift analysis improves the precision of the previous value of 3 S 1− 3 D 1 mixing parameter ε1. The measurement yields the value Δσ L = (− 55 ± 20 ± 7) mb. The result of a simple phase shift analysis for ε1 is presented and compared with the theoretical potential model predictions and other experiments.

The Journal of Pathology and BacteriologyVolume 92, Issue 2 p. 564-567 Short Article Primary malignant haemangioma of the heart J. Švejda, J. Švejda Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorR. Dvořák, R. Dvořák Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorF. Melichar, F. Melichar Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorV. Jedlička, V. Jedlička Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this author J. Švejda, J. Švejda Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorR. Dvořák, R. Dvořák Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorF. Melichar, F. Melichar Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this authorV. Jedlička, V. Jedlička Departments of Pathology and Medicine, University J. E. Purkyně, Brno, CzechoslovakiaSearch for more papers by this author First published: October 1966 https://doi.org/10.1002/path.1700920235Citations: 9AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat References Amsterdam, H. J., Grayzel, D. M., and Louria, A. L., 1949. Amer. Heart J., 37, 291. Greenberg, M., and Angrist, A., 1948. Amer. Heart J., 35, 623. Hewer, T. F., and Kemp, R. P., 1936. This Journal, 43, 511. Lübschitz, Karen, Lundsteen, E., and Forchhammer, Eva, 1949. Radiology, 52, 79. McNalley, M. C., Kelble, D., Pryor, R., and Blount, S. G., Jr, 1963. Amer. Heart J., 65, 244. Prichard, R. W., 1951. Archs Path., 51, 98. Citing Literature Volume92, Issue2October 1966Pages 564-567 ReferencesRelatedInformation

The Journal of Pathology and BacteriologyVolume 80, Issue 2 p. 430-432 Short Article Fibrous hamartoma or so-called fibroma of the myocardium J. Švejda, J. Švejda Institute of Pathological Anatomy of the Medical Faculty, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this authorV. Tomášek, V. Tomášek Institute of Pathological Anatomy of the Medical Faculty, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this author J. Švejda, J. Švejda Institute of Pathological Anatomy of the Medical Faculty, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this authorV. Tomášek, V. Tomášek Institute of Pathological Anatomy of the Medical Faculty, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this author First published: October 1960 https://doi.org/10.1002/path.1700800229Citations: 15AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Citing Literature Volume80, Issue2October 1960Pages 430-432 RelatedInformation

The Journal of Pathology and BacteriologyVolume 76, Issue 2 p. 343-348 Article A disseminated granular-cell pseudotumour; so-called metastasising granular-cell myoblastoma J. Švejda, J. Švejda Institute of Pathological Anatomy, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this authorV. Horn, V. Horn Institute of Pathological Anatomy, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this author J. Švejda, J. Švejda Institute of Pathological Anatomy, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this authorV. Horn, V. Horn Institute of Pathological Anatomy, Masaryk University, Brno, CzechoslovakiaSearch for more papers by this author First published: October 1958 https://doi.org/10.1002/path.1700760203Citations: 28AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume76, Issue2October 1958Pages 343-348 RelatedInformation