Journal Article Assessment of indoor radon doses received by the students in the Azad Kashmir schools, Pakistan Get access Muhammad Rafique, Muhammad Rafique * 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan *Corresponding author: rafi_722002@yahoo.com, mrafique@gmail.com Search for other works by this author on: Oxford Academic PubMed Google Scholar S. U. Rahman, S. U. Rahman 2Department of Medical Physical, Nuclear Medicine, Oncology and Radiotherapy Institute, Islamabad, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Said Rahman, Said Rahman 3SPAS Dte Division SPARCENT, SUPARCO HQs, Karachi, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Matiullah, Matiullah 4Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar M. Ikram Shahzad, M. Ikram Shahzad 4Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Navid Ahmed, Navid Ahmed 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Javid Iqbal, Javid Iqbal 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Basharat Ahmed, Basharat Ahmed 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Tanveer Ahmed, Tanveer Ahmed 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Nadeem Akhtar Nadeem Akhtar 1Department of Physics, University of Azad Jammu & Kashmir Muzaffarbad, 13100 Azad Kashmir, Pakistan Search for other works by this author on: Oxford Academic PubMed Google Scholar Radiation Protection Dosimetry, Volume 142, Issue 2-4, December 2010, Pages 339–346, https://doi.org/10.1093/rpd/ncq267 Published: 27 September 2010 Article history Received: 10 May 2010 Revision received: 15 July 2010 Accepted: 25 August 2010 Published: 27 September 2010
We investigate the fragmentation of 158AGeV 207Pb projectiles with Bi, Pb, Cu and Al targets using CR-39 nuclear track detectors. The exposures were made at SPS-CERN. After the etching, the detectors were scanned using an optical microscope to collect the data of etched cone diameters and lengths. We measured the partial charge-changing cross sections using the data of etched cone lengths. The predicted cross sections are compared to similar measurements reported in literature and their dependences on projectile and target mass are described.
The search for magnetic monopoles in the cosmic radiation remains one of the main aims of non-accelerator particle astrophysics. Experiments at high altitude allow lower mass thresholds with respect to detectors at sea level or underground. The SLIM experiment is a large array of nuclear track detectors at the Chacaltaya High Altitude Laboratory (5290 m a.s.l.). The results from the analysis of 171 m$^2$ exposed for more than 3.5 y are here reported. The completion of the analysis of the whole detector will allow to set the lowest flux upper limit for Magnetic Monopoles in the mass range 10$^5$ - 10$^{12}$ GeV. The experiment is also sensitive to SQM nuggets and Q-balls, which are possible Dark Matter candidates.
We investigate the fragmentation cross sections of 158 AGeV 207Pb projectile interacting with different targets using CR39 nuclear track detectors. The exposure is made at SPS beam facility of CERN. The detectors are chemically etched to obtain data in the form of etched cone length. The nuclear and electromagnetic contributions to the measured total charge-changing cross sections are investigated. The estimated results are compared with those found in the literature for similar research work.
The search for rare particles in the cosmic radiation remains one of the main aims of non-accelerator particle astrophysics. Experiments at high altitude allow lower mass thresholds with respect to detectors at sea level or underground. The SLIM experiment is a large array of nuclear track detectors located at the Chacaltaya High Altitude Laboratory (5290 m a.s.l.). The preliminary results from the analysis of a part of the first 236 sq.m exposed for more than 3.6 y are here reported. The detector is sensitive to Intermediate Mass Magnetic Monopoles and to SQM nuggets and Q-balls, which are possible Dark Matter candidates.
The purpose of this study is to examine the properties of the dust-acoustic solitary waves in a complex magnetoplasma made up of negatively charged moving dust grains in the lower ionospheric region and inertialess electrons and ions obeying Maxwell and kappa distributions, respectively. In this context, the reductive perturbation technique is carried out to obtain the Zakharov–Kuznetsov (ZK) equation within the given framework. The obtained evolution equation, i.e., ZK equation is transformed to a planar dynamical system for studying the qualitative behavior of the solitary waves. The impact of important physical parameters, such as the dust number density, ion concentration, ion temperature, superthermality, and the background magnetic field, on the profile of the nonlinear structures is numerically investigated. The findings may be utilized to comprehend the low-frequency irregularities that are detected in the lower ionosphere.
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