نتایج جستجو برای: 2s
تعداد نتایج: 6212 فیلتر نتایج به سال:
در این پایان نامه تصحیح انرژی معادله ی دیراک در فضای ناجابجایی دینامیکی مورد بررسی قرار می گیرد. هامیلتونی نسبیتی اتم هیدروژن را در فضای ناجابجایی دینامیکی بدست آورده و با استفاده از آن تصحیح انرژی را برای حالت پایه و حالتهای ?2s?_(1/2) و ?2p?_(1/2) بدست می آوریم. مشاهده می شود که تصحیح انرژی به پارامتر ناجابجایی دینامیکی ? بستگی دارد. با استفاده از دقت اندازه گیری انرژی، حد بالایی برای ? بدست ...
The pine sawfly Diprion jingyuanensis Xiao and Zhang (Hymenoptera: Diprionidae) is a serious pest of Pinus tabulaeformis Carr. in the Shanxi, Gansu, Inner Mongolia provinces P. R. China. sex pheromone D. was shown to be propionate ester 3,7-dimethyl-2-tridecanol. Virgin females contained an approximate 1:3 blend precursors erythro-(2S,3S,7R/S 2R,3R,7R/S)-3,7-dimethyl-2-tridecanol threo-(2S,3R,7...
Short Wavelength Laser Calculations in the Beryllium, Boron 2 and Carbon Isoelectronic Sequences Level populations of the 2s3p, 2s 3p 2 and 2s 2p3p configurations in ions of the Be I, R I and C I isoelectronic 2 sequences can be inverted with respect to populations of the 2s3s, 2s 3s 2 and 2s 2p3s configurations by electron collisional pumping. In the case of B I and C I ions, the process is an...
This paper intends to study the following degenerate fractional Schrödinger–Kirchhoff–Poisson equations with critical nonlinearity and electromagnetic fields in R3: {ε2sM([u]s,A2)(−Δ)Asu+V(x)u+ϕu=k(x)|u|r−2u+(Iμ∗|u|2s♯)|u|2s♯−2u,x∈R3,(−Δ)tϕ=u2,x∈R3, where ε>0 is a positive parameter, 3/4<s<1, 0<t<1, V an electric potential satisfying suitable assumptions, 0<k∗≤k(x)≤k∗, Iμ(x)=|x|3−μ 0<μ<3, 2s♯=3...
In this paper we investigate some basic properties of fractional powers. In this regard, we show that for any rational number 1 ≤ 2r+1 2s+1 < og(G), G 2r+1 2s+1 −→ H if and only if G −→ H− 2s+1 2r+1 . Also, for two rational numbers 2r+1 2s+1 < 2p+1 2q+1 and a non-bipartite graph G, we show that G 2r+1 2s+1 < G 2p+1 2q+1 . In the sequel, we introduce an equivalent definition for circular chromat...
We investigate the relationship between the eigenvalues of a graph G and fractional spanning tree packing and coverings of G. Let ω(G) denote the number of components of a graph G. The strength η(G) and the fractional arboricity γ (G) are defined by η(G) = min |X | ω(G − X) − ω(G) , and γ (G) = max |E(H)| |V (H)| − 1 , where the optima are taken over all edge subsets X whenever the denominator ...
The decays B + → J/ ψ3π + 2π − and B + → ψ (2S)π + π + π − are observed for the first time using a data sample corresponding to an integrated luminosity of 3.0 fb −1 , collected by the LHCb experiment in proton–proton collisions at the centre-of-mass energies of 7 and 8 TeV. The branching fractions relative to that of B + → ψ (2S)K + are measured to be B(B + → J/ ψ3π + 2π −) B(B + → ψ (2S)K +) ...
Using 14 million ψ(2S) events collected with the BESII detector, branching fractions of ψ(2S) → K(892)K+c.c. and K(892)K 0 + c.c. are determined to be: B(ψ(2S) → K(892)K + c.c.) = (2.9 −1.7 ± 0.4) × 10 −5 and B(ψ(2S) → K(892)K 0 + c.c.) = (13.3 −2.7 ± 1.7)× 10 . The results confirm the violation of the “12% rule” for these two decay channels. A large isospin violation between the charged and ne...
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