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  • 1. Al-Jobori, S. M.
    et al.
    Itawi, R. K.
    Saad, Abbas
    Shihab, K. M.
    Jalil, M.
    Farhan, S.S.
    Analysis of natural milk and milk powder samples by NAA1990In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 144, no 3, p. 229-239Article in journal (Refereed)
    Abstract [en]

    As a part of the Iraqi Food'Analysis Programme /I.F.A.P./ the concentrationof Na, Mg, P, CI, K, Ca, Zn, Se, Br, Rband I in natural milk collected from different regions of Iraq, and in milkpowder samples have been determined byusing the NAA technique. It was found that except for the elements I, Rb and Br the concentration of the elements was approximately identical in both the natural milks and milk powders.

  • 2. Al-Jobori, S.M.
    et al.
    Itawi, R.K.
    Jalil, M.
    Saad, Abbas
    Ali, K. E.
    Determination of major, minor and trace elements in Iraqi vegetabel samples by INAA1992In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 159, no 1, p. 29-36Article in journal (Refereed)
    Abstract [en]

    Vegetable samples collected from different locations in Iraq have been analyzed by the method of instrumental neutron activation analysis for the determination of its content of major, minor and trace elements. Twenty types of vegetables have been analyzed and the concentrations of sixteen elements are presented.

  • 3. Al-Jobori, S.M.
    et al.
    Shihab, K.M.
    Jalil, M.
    Saad, Abbas
    Mohsin, A.
    Multielement determination in rice, wheat, and barley by instrumental neutron activation analysis1990In: Biological Trace Element Research, ISSN 0163-4984, E-ISSN 1559-0720, Vol. 26/27, p. 637-645Article in journal (Refereed)
    Abstract [en]

    INAA has been used for the determination of Na, Mg, Al, Cl, K, Sc, Cr, Mn, Fe, Co, Cu, Zn, As, Se, Br, Rb, Sr, Mo, and W in grains of rice, wheat, and barley, which were collected from different plant fields in Iraq. Samples and standards were irradiated in the IRT-5000 reactor, at neutron fluxes of 2 × 1013 cm−2·s−1 and 3.2 × 1011 cm−2·s−1. Interferences of photopeaks with each other were considered, and reaction interferences were calculated and determined experimentally. Accuracy of our method was assessed by the analysis of IAEA standards Wheat Flour and Bovine liver. A good agreement has been achieved between the present results and recommended values. The precision and detection limit were determined for all elements in all types of grain.

  • 4.
    Bargholts, Christof
    et al.
    Stockholms Universitet.
    Norlin, Lars-Olov
    KTH, School of Engineering Sciences (SCI), Physics.
    Tegnér, Per-Erik
    Stockholms Universitet.
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Wachtmeister, S.
    Stockholms Universitet.
    A new laboratory for measurements of low-level radioactivity2008In: Applied Radiation and Isotopes, ISSN 0969-8043, E-ISSN 1872-9800, Vol. 66, no 10, p. 1443-1449Article in journal (Refereed)
    Abstract [en]

    A laboratory for measuring low-level radioactivity has been built at the AlbaNova University Center in Stockholm. Low-level concrete in combination with a 5 cm iron lining provide an average photon fluency rate from terrestrial sources at least a factor of 40 below that in the common laboratories of the Center. The radon activity inside the laboratory has been measured to (3 +/- 2) Bq m(-3). Material considerations are discussed. Construction and performance of the laboratory, as well as the present instrumentation, is described.

  • 5. Chilo, Josè
    et al.
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Liszka, L.
    Eide, Å.J.
    Lindblad, Thomas
    KTH, School of Engineering Sciences (SCI), Physics.
    Persson, L.
    Infrasonic and Seismic Signals from Earthquake and Explosions in Arequipa, Perú2006In: Western Pacific Geophysics Meeting. 24-27 July 2006, Beijing, China, 2006Conference paper (Refereed)
  • 6.
    Chilo, José
    et al.
    University of Gävle.
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Lindblad, Thomas
    KTH, School of Engineering Sciences (SCI), Physics.
    et al.,
    Filtering and extracting features from infrasound data2005In: 2005 14TH IEEE-NPSS Real Time Conference: Stockholm; 4 June 2005 through 10 June 2005, 2005, p. 451-455Conference paper (Refereed)
    Abstract [en]

    There are many reasons for using infrasound, i.e. low frequency sound, to monitor various events. Inherent features like its long-distance propagation and the use of simple, ground based equipment in very flexible system are some. The disadvantage is that it is a slow system due to the speed of sound. In this papr we try to show that there are several other advantages if one can extract all the features of the signal. In this way it is hoped that we can get a fingerprint of the event that caused the infrasound. Rayleigh waves and sound from epicentre may be obtained for earthquakes, pressure pulses and electro jets from aurora, core radius and funnel shape from tornados, etc. All these possibilities are suggestive for further R&D of the infrasound detection systems.

  • 7.
    Chilo, José
    et al.
    University of Gävle.
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Lizska, Ludwik
    Swedish Institute of Space Physics in Umeå.
    Eide, Åge J.
    Ostfold University College.
    Lindblad, Thomas
    KTH, School of Engineering Sciences (SCI), Physics.
    Obtaining "images" from iron objects using a 3-axis fluxgate magnetometer2007In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 580, no 2, p. 1105-1109Article in journal (Refereed)
    Abstract [en]

    Magnetic objects can cause local variations in the Earth's magnetic field that can be measured with a magnetometer. Here we used triaxial magnetometer measurements and an analysis method employing wavelet techniques to determine the "signature" or "fingerprint" of different iron objects. Clear distinctions among the iron samples were observed. The time-dependent changes in the frequency powers were extracted by use of the Morlet wavelet corresponding to frequency bands from 0.1 to 100 Hz. (c) 2007 Elsevier B.V. All rights reserved.

  • 8.
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Novelty and change detection radiation physics experiments2007Licentiate thesis, comprehensive summary (Other scientific)
    Abstract [en]

    This thesis deals with the detection and analysis of low-level natural and induced radioactivity. Using high energy-resolution Ge detectors in low-level counting areas airborne radioactivity’s like Be-7 and Cs-137 have been investigated. The experimental facilities and techniques are described in some detail.

    One of the aims in this work is the studying of change detection in the amount of the activity received on the earth from events that happen at the solar system. Information about this is achieved by measuring the activity of the Be-7 isotope, which is a very good indicator of the solar protons that reach the atmosphere of the Earth. Therefore Be-7 probes the variation of the boundary conditions on the Earth related to solar events as well as transportation between the atmospheric layers, troposphere and stratosphere, which are the layers nearest to the ground. Results obtained by this work refer to the seasonal variation and the eleven years sun cycle in addition to the two to three years cycle expected by some scientists. These results are shown in many figures of the activity measurements and the Fourier transformation of the intensity of the Be-7.

    The effect of the man-made radiation in the air was studied by collection of Cs-137, which was contaminating most of countries in the world after the Chernobyl accident. Our search for low levels of Cs-137 shows how important it is to use a Low Level Laboratory, like the one at AlbaNova, for measurements of novelty and change.

    Studying the airborne activity in Sweden and Finland at the same time and time interval gives us a possibility to look for correlations of the fall down of the Be-7 activity from the upper layers of the atmosphere simultaneously in both countries.

    This thesis also involves the results of Neutron Activation Analysis Technique applied to the general human food, milk, vegetables and grains. The experiments were performed at the neutron beam of the Iraqi reactor IRT 5000 at Baghdad. The goal of the experiments was to determine iodine and other trace elements after the Chernobyl accident compared to results from different countries.

    An exploratory, preliminary study of airborne activities, following e.g. an accident at a nuclear power plant, or leakage of radiation from any source of contamination at any region, using a small, expendable unmanned aerial vehicle is also discussed briefly.

  • 9.
    Puscow, Johan
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Schlüter, Andreas
    Jabor, Abbas
    KTH, School of Engineering Sciences (SCI), Physics.
    Sing-Yer, M. A.
    Hollman, Nils
    Eide, Åge J.
    Ostfold University College.
    Lindblad, Thomas
    A small expendable UAV for monitoring radiation outlets2006In: NATO/FOI Workshop on Autonomy in UAV-systems, 2006Conference paper (Other academic)
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