Calculations on shielding are required for the building of a gamma ray radiography exposure room to ensure worker radiation. A measurement used evaluate radiation diffusive and absorption characteristics medium is linear attenuation coefficient ( ). Despite fact that, as moves through medium, its influenced by wavelength well thickness composition crucial in interaction with matter. This resear...

Belle is an experiment designed to make measurements of time-dependent CP asymmetries in B physics. Important measurements of these phenomena have recently been reported.1 In addition, owing to the unparalleled performance of KEKB,2 and the excellent performance of the Belle detector, numerous interesting rare B decay modes can be studied. The Belle detector is described in detail elsewhere.3 I...

dried aceton-chloroform extract of aerial parts of euphorbia spinidens bornm. ex prokh. endemic to iran, yielded two new triterpenoids, lup-20(29)-ene-33, 28 diol commonly known as betulin and (3β,23e)-cycloarta-23-ene-3,25-diol. the structures of the isolated compounds were elucidated by 13 c- and 1 h-nmr as well as 2d-nmr, ir and by the aid of mass fragmentation pattern. in phagocyte chemilum...

AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is ...

AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is ...