نتایج جستجو برای: field gamma
تعداد نتایج: 902353 فیلتر نتایج به سال:
natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. in the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...
فرض کنید $ r $ حلقه ای جابه جایی و یکدار و $ z(r) $ مجموعه مقسوم علیه های صفر حلقه $ r $ باشد. گراف جمعی حلقه $ r $ گرافی است که رئوس آن عناصر حلقه می باشد و دو راس متمایز $ x $ و $ y $ مجاورند اگر و تنها اگر $ x+y in z(r) $ . این گراف با نماد $ t(gamma(r)) $ نمایش داده می شود. در این پایان نامه دو زیر گراف $ t_0(gamma(r)) $ و $ z_0(gamma(r)) $ که رئوس آن به ترتیب $ r ^* $...
Neutron response Induced in Thermoluminescence Dosimeter TLD-700 chips due to reactions of thermal neutrons with slab phantom and Badge Dosimeter TLD-600,700 materials in a neutron-gamma mixed field was measured. Using the linear relationship between thermal neutron fluence and the thermal neutrons induced TL response with slab phantom, Badge-TLD Materials, an empirical relationship was introdu...
Let $R$ be a ring (not necessarily commutative) with nonzero identity. We define $Gamma(R)$ to be the graph with vertex set $R$ in which two distinct vertices $x$ and $y$ are adjacent if and only if there exist unit elements $u,v$ of $R$ such that $x+uyv$ is a unit of $R$. In this paper, basic properties of $Gamma(R)$ are studied. We investigate connectivity and the girth of $Gamma(R)$, where $...
The possibility of employing α-Al2O3:C (TLD-500) for estimation of gamma dose in mixed n-γ radiation fields by two peak method has investigated. It was found that the main peak can be reliably deconvoluted to two component glow peaks. The ratio of peak 2 to peak 1 in pure gamma ray radiation field (137Cs) is 1.49 whereas irradiation by Am-Be neutrons results in a ratio of 1.12. The precision of...
Background: Assessment of activity concentrations of 238U, 232Th, 40K and gamma dose rate (DR) was carried out over a laterite mining field in Ilorin-south, Nigeria. Materials and Methods: A well calibrated Super-Spec (RS-125) gamma spectrometer was used to measure the activity concentrations of 40K, 238U, 232Th and gamma doses rate at 1 m above the ground level over the laterite mining field. ...
Three distinct gamma oscillations, generated in different CA1 layers, occur at different phases of concurrent theta oscillation. In parallel, firing of place cells displays phase advancement over successive cycles of theta oscillations while an animal passes through the place field. Is the theta-phase-precessing output of place cells shaped by distinct gamma oscillations along different theta p...
In this paper, we have shown that the coset diagrams for the action of a linear-fractional group $Gamma$ generated by the linear-fractional transformations $r:zrightarrow frac{z-1}{z}$ and $s:zrightarrow frac{-1}{2(z+1)}$ on the rational projective line is connected and transitive. By using coset diagrams, we have shown that $r^{3}=s^{4}=1$ are defining relations for $Gamma$. Furt...
فرض کنید $ g $ یک گراف ساده، $ c(x) $ حلقه ای از تمام توابع پیوسته ی حقیقی مقدار روی فضای کاملاً منظم هاسدورف $ x $ و $ gamma(c(x)) $ گراف مقسوم علیه-صفر در حلقه ی $ c(x) $ باشد، در این پایان نامه ارتباط بین ویژگی های گراف $ gamma(c(x)) $، ویژگی های حلقه ی $ c(x) $ و ویژگی های توپولوژیکی فضای $ x $ بررسی می شود. سپس نشان داده می شود عدد خوشه ای ...
Introduction: Neutrons have many applications in various fields, such as medicine. The important application of neutron in medical science is in Boron Neutron Capture Therapy (BNCT). Because of this, determination of neutron dose and flux is critical for the health maintaining of workers and patients exposed to this beam. The neutron radioisotope sources produce gamma rays in ...
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