نتایج جستجو برای: fast neutrons
تعداد نتایج: 248250 فیلتر نتایج به سال:
background: the trabecular bone changes in the tibia of c3h/hen mice were measured 12 weeks after whole body irradiation with various doses of fast neutrons (0-2.4 gy) or 137cs-generated gamma-rays (0-6 gy). materials and methods: serum calcium, phosphorus, estradiol concentration and alkaline phosphatase activity were measured. tibiae were analyzed using microcomputed tomography. biomechanical...
The ”triple-Regge” analysis of subleading Reggeon contributions to the diffractive structure function in DIS at HERA is presented. The recently published data allow to determine the only free parameter of the analysis related to the ratio of the RRIP and IPIPIP couplings. The large value of this ratio is prefered which is in agreement with analyses of soft hadronic interactions. The role of the...
In this paper, we present new experimental results about crystallographic and magnetic properties obtained on magnetite Fe,04 and haematite a-FqO, samples irradiated by fast neutrons. Polycrystalline rods were irradiated at 350K by fast neutrons inside the core of Melusine nuclear reactor (CENG) in Grenoble at various fluences (4 lO", 9.2 1019 and 20 10'' neutronslcm~). The irradiated samples h...
It is usually assumed in stellar nucleosynthesis calculations that neutrons art completely thcrmalizcd. Hence, if the cross section of a neutron-induced reaction has a threshold, or it is suppressed by the Coulomb barrier in the exit channel, the reaction rate is quite low. However, the contribution front the decelerating fast neutrons has been neglected previously. We show that, though ihe fra...
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