High-resolution collinear fast-ion-beam-laser spectroscopy has been applied to investigate the optical isotope shifts for transition 4f^(4)5d^(6)K_(11/2)-(24445)°_(11/2) of NdⅡ.From the measured optical isotope ...High-resolution collinear fast-ion-beam-laser spectroscopy has been applied to investigate the optical isotope shifts for transition 4f^(4)5d^(6)K_(11/2)-(24445)°_(11/2) of NdⅡ.From the measured optical isotope shifts,changes in mean-square nuclear charge radiiδ(r^(2))(fm^(2))among five even-even neodymium isotopes have been deduced:(142,144)0.282,(144,146)0.242,(146,148)0.274,(148,150)0.404.The results are in good agreement with experimental data from electronic x-ray spectroscopy and combined optical and x-ray spectroscopy.展开更多
Atomic spectra of singly ionized neodymium have been measured by collinear fast-ion-beam laser spectroscopy.The resonant spectra in the lines of 568.9,570.8,572.7,and 574.1 nm in NdH were obtained and the optical shif...Atomic spectra of singly ionized neodymium have been measured by collinear fast-ion-beam laser spectroscopy.The resonant spectra in the lines of 568.9,570.8,572.7,and 574.1 nm in NdH were obtained and the optical shifts were determined.We obtained the optical shifts of all the five even isotopes(142-150)in Nd IL The accuracy of our results was improved by one order of magnitude compared with other published results.展开更多
We have set up an experimental system consisting of an im gun and a Rutherford backscattering spectro-metry(RBS)analysis chamber.Using this system,in situ 2MeV*He+RBS analysis of films is carried out by combination wi...We have set up an experimental system consisting of an im gun and a Rutherford backscattering spectro-metry(RBS)analysis chamber.Using this system,in situ 2MeV*He+RBS analysis of films is carried out by combination with sputter etching cf low energy Ar+ions.As an example of the sputtering/RBS method,the analysis of three samples,i.e.,Si/(GexSi_(1-x)/Si)/Si(100),WSi_(x)/SiO_(2)/Si and CoSi_(x)/Si,is presented in this paper.After an appropriate fraction of the thick layer is removed by sputtering,the back edge of the Ge peak is separated from Si RBS spectmm on the interface and the O peak of the buried S1O2 layer can be identified.The change cf the doped Ti and W concentrations related to Co on the top surface is observed.The advantages of this analytical method and its possible applications in film are discussed.展开更多
The occurrence of micrograined gold has been a key subject in research in mineralogy and ore deposits since the Carlin-type gold deposit was found. The new microbeam analysis techniques involving scanning proton micro...The occurrence of micrograined gold has been a key subject in research in mineralogy and ore deposits since the Carlin-type gold deposit was found. The new microbeam analysis techniques involving scanning proton microproby(SPM) and scanning electron microscopy (SEM) used for investigation of gold occurrence in the micrograined gold deposit from Jinya, Guangxi Province are first reported here. The Jinya micrograined gold deposit, located at Fengshan County, the northwest展开更多
基金Supported by the National Climbing Project of Chinathe National Natural Science Foundation of China under Grant No.19774016the Doctoral Research Funds of the State Education Commission of China under Grant No.9424626。
文摘High-resolution collinear fast-ion-beam-laser spectroscopy has been applied to investigate the optical isotope shifts for transition 4f^(4)5d^(6)K_(11/2)-(24445)°_(11/2) of NdⅡ.From the measured optical isotope shifts,changes in mean-square nuclear charge radiiδ(r^(2))(fm^(2))among five even-even neodymium isotopes have been deduced:(142,144)0.282,(144,146)0.242,(146,148)0.274,(148,150)0.404.The results are in good agreement with experimental data from electronic x-ray spectroscopy and combined optical and x-ray spectroscopy.
基金Supported by the National Natural Science Foundation of China under Grant No.19774016.
文摘Atomic spectra of singly ionized neodymium have been measured by collinear fast-ion-beam laser spectroscopy.The resonant spectra in the lines of 568.9,570.8,572.7,and 574.1 nm in NdH were obtained and the optical shifts were determined.We obtained the optical shifts of all the five even isotopes(142-150)in Nd IL The accuracy of our results was improved by one order of magnitude compared with other published results.
基金Supported by the National Natural Science Foundation of China under Grant No.19874068the National High Performance Computing Fund.
文摘We have set up an experimental system consisting of an im gun and a Rutherford backscattering spectro-metry(RBS)analysis chamber.Using this system,in situ 2MeV*He+RBS analysis of films is carried out by combination with sputter etching cf low energy Ar+ions.As an example of the sputtering/RBS method,the analysis of three samples,i.e.,Si/(GexSi_(1-x)/Si)/Si(100),WSi_(x)/SiO_(2)/Si and CoSi_(x)/Si,is presented in this paper.After an appropriate fraction of the thick layer is removed by sputtering,the back edge of the Ge peak is separated from Si RBS spectmm on the interface and the O peak of the buried S1O2 layer can be identified.The change cf the doped Ti and W concentrations related to Co on the top surface is observed.The advantages of this analytical method and its possible applications in film are discussed.
文摘The occurrence of micrograined gold has been a key subject in research in mineralogy and ore deposits since the Carlin-type gold deposit was found. The new microbeam analysis techniques involving scanning proton microproby(SPM) and scanning electron microscopy (SEM) used for investigation of gold occurrence in the micrograined gold deposit from Jinya, Guangxi Province are first reported here. The Jinya micrograined gold deposit, located at Fengshan County, the northwest
