In order to understand the dnve-in target in a D-D type neutron generator,it is essential to study the mechanism of the interaction between hydrogen ion beams and the hydrogenabsorbing metal film.The present research ...In order to understand the dnve-in target in a D-D type neutron generator,it is essential to study the mechanism of the interaction between hydrogen ion beams and the hydrogenabsorbing metal film.The present research concerns the nucleation of hydride within zirconium film implanted with hydrogen ions.Doses of 30 keV hydrogen ions ranging from 4.30×10^（17） to1.43×10^（18） ions cm^（-2） were loaded into the zirconium film through the ion beam implantation technique.Features of the surface morphology and transformation of phase structures were investigated with scanning electron microscopy,atomic force microscopy and x-ray diffraction.Confirmation of the formation of 5 phase zirconium hydride in the implanted samples was first made by x-ray diffraction,and the different stages in the gradual nucleation and growth of zirconium hydride were then observed by atomic force microscope and scanning electron microscopy.展开更多
To study the screening effect of nuclear reactions in metallic environments, the thick target yields, the cross sections and the experimental S（E） factors of the D（d, p）T reaction have been measured on deuterons i...To study the screening effect of nuclear reactions in metallic environments, the thick target yields, the cross sections and the experimental S（E） factors of the D（d, p）T reaction have been measured on deuterons implanted in Sm metal at 133.2K for beam energies ranging from 10 to 20 ke V. The thick target yields of protons emitted in the D（d, p）T reaction are measured and compared with those data extrapolated from cross sections and stopping power data at higher energies. The screening potential in Sm metal at 133.2K is deduced to be 520±56eV. As compared with the value achieved in the gas target, the calculated screening potential values are much larger. This screening potential cannot be simply interpreted only by the electron screening. Energy dependences of the cross section σ（E） and the experimental S（E） factor for D（d,p）T reaction in Sm metal at 133.2K are obtained, respectively.展开更多
The D（d,p）T reaction in Be metal environments has been measured to investigate the electron screening effect in metals in an energy region of from 5.5 keV to 10 keV in a center of mass system （CMS） at a temperatur...The D（d,p）T reaction in Be metal environments has been measured to investigate the electron screening effect in metals in an energy region of from 5.5 keV to 10 keV in a center of mass system （CMS） at a temperature of 121 K. The depth distribution of deuteron density in Be metals has an impact on the observed reaction yields. A model of deuteron density distribution in metal has been proposed to obtain the original yields. A screening energy of （116±46） eV has been obtained with the assumed deuteron density distribution model.展开更多
基金Financial support from National Natural Science Foundation of China(nos 11205136 and 11505145)the Research Fund for Doctoral Program of Southwest University of Science and Technology(no.l4zx7166)
文摘In order to understand the dnve-in target in a D-D type neutron generator,it is essential to study the mechanism of the interaction between hydrogen ion beams and the hydrogenabsorbing metal film.The present research concerns the nucleation of hydride within zirconium film implanted with hydrogen ions.Doses of 30 keV hydrogen ions ranging from 4.30×10^（17） to1.43×10^（18） ions cm^（-2） were loaded into the zirconium film through the ion beam implantation technique.Features of the surface morphology and transformation of phase structures were investigated with scanning electron microscopy,atomic force microscopy and x-ray diffraction.Confirmation of the formation of 5 phase zirconium hydride in the implanted samples was first made by x-ray diffraction,and the different stages in the gradual nucleation and growth of zirconium hydride were then observed by atomic force microscope and scanning electron microscopy.
基金Supported by the National Natural Science Foundation of China under Grant No A050314.
文摘To study the screening effect of nuclear reactions in metallic environments, the thick target yields, the cross sections and the experimental S（E） factors of the D（d, p）T reaction have been measured on deuterons implanted in Sm metal at 133.2K for beam energies ranging from 10 to 20 ke V. The thick target yields of protons emitted in the D（d, p）T reaction are measured and compared with those data extrapolated from cross sections and stopping power data at higher energies. The screening potential in Sm metal at 133.2K is deduced to be 520±56eV. As compared with the value achieved in the gas target, the calculated screening potential values are much larger. This screening potential cannot be simply interpreted only by the electron screening. Energy dependences of the cross section σ（E） and the experimental S（E） factor for D（d,p）T reaction in Sm metal at 133.2K are obtained, respectively.
基金Supported by National Natural Science Foundation of China (10675056)
文摘The D（d,p）T reaction in Be metal environments has been measured to investigate the electron screening effect in metals in an energy region of from 5.5 keV to 10 keV in a center of mass system （CMS） at a temperature of 121 K. The depth distribution of deuteron density in Be metals has an impact on the observed reaction yields. A model of deuteron density distribution in metal has been proposed to obtain the original yields. A screening energy of （116±46） eV has been obtained with the assumed deuteron density distribution model.
