نتایج جستجو برای: nuclear reaction theory
تعداد نتایج: 1397733 فیلتر نتایج به سال:
The condensed matter nuclear reactions (CMNR) are thought to happen for trapped H(D) particles within some chemical (electro-magnetic) potential well with finite life time. As the life time is much longer than the collision time of two-body interaction of free particles, CMNR reaction rates are significantly (on the order of 19-20 in magnitude) enhanced if we compare with estimated reactions ra...
The unique feature of electrochemistry is the ability to control reaction thermodynamics and kinetics by application electrode potential. Recently, theoretical methods computational approaches within grand canonical ensemble (GCE) have enabled explicitly include potential in first principles calculations. In this review, recent advances future promises GCE density functional theory rate are dis...
A small number of naturally occurring, proton-rich nuclides (the p-nuclei) cannot be made in the s- and r-processes. Their origin is not well understood. Massive stars can produce p-nuclei through photodisintegration of pre-existing intermediate and heavy nuclei. This so-called γ-process requires high stellar plasma temperatures and occurs mainly in explosive O/Ne burning during a core-collapse...
according to the importance of positron emitters in nuclear medicine, 82mrb was produced as a member of this group of radiopharmaceuticals. after being converted into an injectable form, enough information was provided for imaging with this radiopharmaceutical. 82mrb with high radioisotopic purity and half-life of 6.5 hours, in chloride form, can be considered as a suitable positron emitter for...
The Trojan-horse method has been proposed to extract S-matrix elements of a two-body reaction at astrophysical energies from a related reaction with three particles in the ®nal state. This should be useful in cases where the direct measurement of the two-body reaction at the necessary low energies is experimentally dif®cult. The formalism of the Trojan-horse method for nuclear reactions is deve...
one of the most challenges of iran foreign policy during of 2003-2015 was iran nuclear program. in these years the governments of seyed mohamad khatami and mahmoud ahmadinejad tried to solve the problem of iran nuclear case but this important issue only realized in hasan rouhani government. the main question here is that what factors did influence on decision making of iran’s officials and acqu...
the hydrogen abstraction reaction of oh radical with ch3ch2ocf2chf2 (hfe-374pc2) is investigated theoretically by semi-classical transition state theory. the stationary points on the potential energy surface of the reaction are located by using kmlyp density functional method along with 6-311++g(d,p) basis set. vibrational anharmonicity coefficients, xij, required for semi-classical transition ...
density functional theory (dft) calculations have been performed to investigating the effects of themolecular oxygen impurity on the quadrupole coupling constant (qcc) parameters of armchair and zigzagboron nitride nanotubes (bnnts). optimization processes have been performed to relax the original andimpure structures of the investigated bnnts. afterwards, the qcc parameters have been evaluated...
magnesium oxide nanotubes of finite length are investigated by the density functional theory (dft) at the b3lyp/6-31g (d) level. the (6, 0) zigzag and (4, 4) armchair of mgo nanotubes were considered and nuclear magnetic resonance properties including isotropic and anisotropic chemical shielding parameters (csi and csa) were calculated for 25mg and 17o atoms of the optimized structures for the ...
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