نتایج جستجو برای: delayed neutron
تعداد نتایج: 146806 فیلتر نتایج به سال:
Neutron sources employed in different applications in both medicine and industry. Due to the harmful effects of neutron particles on living organisms, radiation shields have played a vital role in radiation protection against neutrons. In recent decade, numerous investigations conducted on the design and fabrication of nanocomposites as more efficient shielding materials against fast and therma...
background: a boron neutron capture therapy (bnct) facility, based on a dt neutron generator, with the final goal to find out a potential, alternative, solution to existing bnct treatment facilities which are based on nuclear reactors is examined. materials and methods: with the aim of the mcnp4b monte carlo code different beam-shaping assembly (bsa) configurations were considered. lead was sel...
in this research, cobalt and nickel sulfide nanoparticles (nps) were grown on almcm-41 matrix by using ion exchange method. the prepared samples were irradiated by thermalized neutron that emitted from am-be source up to fluencies (7.9+e9n/cm2). after that, x-ray diffraction (xrd), uv-vis spectroscopy, fourier transform infrared (ftir), scanning electron microscopy (sem) and transmission electr...
Neutron Generators (NG) are used as a neutron source for different applications. During recent years, major efforts are underway to develop a high yield compact NG. In this way, radiation protection aspects need to be considered during the operation of these high yield NGs. In this paper the neutron effective dose of a NG operator has been calculated using MCNPX Monte Carlo code. The results sh...
We have calculated the evolution of 60 model binary systems consisting of helium stars in the mass range of MHe = 2.5 − 6M⊙ with a 1.4 M⊙ neutron star companion to investigate the formation of double neutron star systems. Orbital periods ranging from 0.09 to 2 days are considered, corresponding to Roche lobe overflow starting from the helium main sequence to after the ignition of carbon burning...
The neutron rich $$^{123}$$ Ag nucleus was populated via induced photofission of UC $$_x$$ at the ALTO ISOL facility. Its $$\beta $$ -decay properties were studied by means detecting -delayed $$\gamma and activities. measured half-life T $$_{1/2}$$ = 0.350(20) s agreed with earlier data; emission branching P $$_{1n}$$ 1.01(24)% reestablished using counting.
the present study is an attempt to investigate the potential impact of inspirational quotes on improving english abstract vocabulary recall. to achieve this goal, a multiple choice language proficiency test of 60 items including vocabulary and grammar component was administered to a sample of 63 second-semester male and female students whose age ranged between 17 to 22 and they were studying en...
The $\beta$ decay of the neutron-rich $^{134}$In and $^{135}$In was investigated experimentally in order to provide new insights into nuclear structure tin isotopes with magic proton number $Z=50$ above $N=82$ shell. $\beta$-delayed $\gamma$-ray spectroscopy measurement performed at ISOLDE facility CERN, where indium were selectively laser-ionized on-line mass separated. Three $\beta$-decay bra...
The $\beta$ decay of the neutron-rich $^{134}$In and $^{135}$In was investigated experimentally in order to provide new insights into nuclear structure tin isotopes with magic proton number $Z=50$ above $N=82$ shell. $\beta$-delayed $\gamma$-ray spectroscopy measurement performed at ISOLDE facility CERN, where indium were selectively laser-ionized on-line mass separated. Three $\beta$-decay bra...
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