نتایج جستجو برای: nuclear tracks

تعداد نتایج: 253894  

Journal: :iranian journal of radiation research 0
m. nain department of physics, govt. p.g. college, karnal, haryana, india 132001 r.p. chauhan departments of physics, indira gandhi national college, ladwa, kurukshetra, india 136132 s.k. chakarvarti department of applied physics, n.i.t. deemed university, kurukshetra, india 136119

abstract  background: the essential constituents of cements like lime, silica and alumina are derived from earth’s crust in which radioactive elements like uranium, thorium etc are also present in varying amounts almost everywhere. these two elements are considered as the parent elements of uranium and thorium radioactive decay series in which radon and thoron are produced respectively as decay...

Journal: :iranian journal of radiation research 0
r.p. chauhan department of physics, national institute of technology kurukshetra-136119, india

background: the most popular building materials are soil bricks and different types of stones. radon is released into ambient air from soil and stones due to ubiquitous uranium and radium in them, thus increasing the airborne radon concentration. the radioactivity in soils is related to radioactivity in the rocks from which the soil is formed. in the present investigation, the radon emanated fr...

A. Mohammadzadeh, H. Afarideh, M. Esmaeilnezhad, M. Ghanadi, M. Ghergherehchi,

Background: High and intermediate energy protons are not able to form a track in a solid state nuclear track detector (SSNTD) directly. However, such tracks can be formed through secondary particles created during primary radiation nuclear reactions in a SSNTD. Materials and Methods: The protons with primary energies of 9.6 and 30 MeV available at the cyclotron accelerator with corresponding lo...

Journal: :Australian Journal of Physics 1955

Journal: :iranian journal of radiation research 0
m. ghergherehchi department of nuclear engineering and physics, amirkabir university of technology, tehran, iran h. afarideh department of nuclear engineering and physics, amirkabir university of technology, tehran, iran m. ghanadi nuclear science and technology research institute, tehran, iran a. mohammadzadeh nuclear science and technology research institute, tehran, iran m. esmaeilnezhad nuclear science and technology research institute, tehran, iran

background: high and intermediate energy protons are not able to form a track in a solid state nuclear track detector (ssntd) directly. however, such tracks can be formed through secondary particles created during primary radiation nuclear reactions in a ssntd. materials and methods: the protons with primary energies of 9.6 and 30 mev available at the cyclotron accelerator with corresponding lo...

2005
S. Procopio

There are several methods for the measurement of radon concentration or exposure, that use nuclear tracks detectors lodged into dosemeters with different geometries. It was necessary to determinate some calibration parameters of the new detector’s optical system in order to characterize instead of a semicylindrical a cylindrical dosemeter was used in this investigation. The new system we used i...

2002
R. A. ORIANI J. C. FISHER

We show that energetic charged particles are produced during electrolysis of a D2O solution of Li2SO4 in a cell with a platinum anode and a palladium cathode. CR-39 plastic detectors, designed for recording alpha particles from radon decay, were immersed in the electrolyte during electrolysis. They recorded significantly larger numbers of energetic particle tracks than were recorded by control ...

2005
P. Buford Price

Fission track dating has greatly expanded its usefulness to geology over the last 40 years. It is central to thermochronology—the use of shortened fission tracks to decipher the thermal history, movement, and provenance of rocks. When combined with other indicators, such as zircon color and (U–Th)/He, a range of temperatures from 40 ◦C to 400 ◦C can be studied. Combining fission track analysis ...

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