نتایج جستجو برای: fission reaction
تعداد نتایج: 426534 فیلتر نتایج به سال:
Cell extracts, prepared from Nocardia restrictus, rapidly oxidize 3,4-dihydroxy-9,lO-secoandrosta-l,3,5(10)-triene9,17-dione with the consumption of 1 mole of oxygen per mole of substrate; no carbon dioxide is evolved. The reaction is stimulated by the presence of ferrous ions. The first product of ring fission has been identified as 4(5),9(10)-diseco-3 -hydroxyandrosta-l(lO),Z-diene-5,9,17trio...
In this paper is presented a discussion of fission induced in heavy elements (uranium) by protons with kinetic energies below about 400 MeV with the main emphasis on fission with protons of a few hundred MeV energy *. Thus, reactions where meson interference becomes of any importance are not considered. Even if fission is the main reaction in heavy nuclei this can not be discussed without consi...
The Coulomb fission may take place in a reaction if the maximum excitation energy transfer exceeds barrier of either projectile or target nucleus. This condition is satisfied all reactions used for earlier blocking measurements time-scale except $$^{208}\hbox {Pb}~+$$ natural Ge crystal, where below measurement limit technique $$<1$$ as. Inclusion data analysis experiments leads us to interpret...
Abstract The fission probability of $$^{238}$$ 238 Np was measured as a function the excitation energy in range E $$^* = 5.4 - 6.2$$ ? = 5.4 - 6.2 MeV order to search...
The work presented here is the first in a series of studies that use a molecular beam scattering technique to investigate the unimolecular reaction dynamics of C(4)H(7) radical isomers. Photodissociation of the halogenated precursor 2-bromo-1-butene at 193 nm under collisionless conditions produced 1-buten-2-yl radicals with a range of internal energies spanning the predicted barriers to the un...
Utilizing (p,d) and (p,t) reactions to obtain (n, f) cross sections in uranium nuclei via the surrogate-ratio method The surrogate ratio method has been tested for (p, d) and (p, t) reactions on uranium nuclei. 236 U and 238 U targets were bombarded with 28-MeV protons and the light ion recoils and fission fragments were detected using the Silicon Telescope Array for Reaction Studies detector a...
چکیده ندارد.
[reaction: see text] A large and normal nitrogen-15 kinetic isotope effect of 1.035 +/- 0.003 provides direct support for the proposed mechanism for the rhodium-catalyzed carbene formation from diazo compounds, which involves the fast formation of a metal-diazo complex followed by rate-limiting extrusion of N2. The large magnitude of the KIE indicates extensive C-N bond fission in the transitio...
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