The MeV cluster beam of(C)_(2)^(+)ions has been bombarded on a copper target and K x-ray spectra of Cu have been measured with a Si(Li)detector.It is found that the K x-ray spectra of Cu induced by bombardment with 2....The MeV cluster beam of(C)_(2)^(+)ions has been bombarded on a copper target and K x-ray spectra of Cu have been measured with a Si(Li)detector.It is found that the K x-ray spectra of Cu induced by bombardment with 2.8 MeV(C)_(2)^(+)and 1.4 MeV C^(+)ions are almost the same.In contrast,K x-ray spectra of Cu induced by bombardment with 2.8 MeV(C)_(2)^(+)and 3.0 MeVSi^(+)ions are quite different.These interesting phenomena are discussed.展开更多
The energy loss and stopping power of ^(4)He ions in mylar foils were determined in a transmission geometry.The experimental stopping power data were compared to the previous measurements at higher energies.At lower e...The energy loss and stopping power of ^(4)He ions in mylar foils were determined in a transmission geometry.The experimental stopping power data were compared to the previous measurements at higher energies.At lower energies,no previous measurements exist.The present results were also compared to the commonly used semiempirically theoretical predictions by Ziegler and Manoyan,and significant deviations were observed.展开更多
Energy loss of 0.45-5.0 MeV 4He ions in Au and Ag films were measured with the Rutherford backscattering method,and the stopping powers at lower energy range were extracted by comparing with that determined by Anderso...Energy loss of 0.45-5.0 MeV 4He ions in Au and Ag films were measured with the Rutherford backscattering method,and the stopping powers at lower energy range were extracted by comparing with that determined by Anderson et al.at higher energy range.Significant deviation between the experimental data and the semiempirical calculations by TRIM-90 appears around the stopping maximum.The accuracy of our results was expected to be±l%.展开更多
In this paper,the degree of alignment of 2P_(3/2) vacancy state in Au induced by proton,lithium and boron ion impact was measured using a Si(Li)detector.Also the projectile-energy dependence of the degree of alignment...In this paper,the degree of alignment of 2P_(3/2) vacancy state in Au induced by proton,lithium and boron ion impact was measured using a Si(Li)detector.Also the projectile-energy dependence of the degree of alignment was investigated over the projectile energy range from 0.2 MeV/amu to 2.0MeV/amu.The de-alignment phenomenon was observed for small relative impact velocities.展开更多
The stopping powers of Br and C in Ag Elm have been measured with the method of elastic recoil detection in energy range 0.28-0.42MeV/amu.The results have been compared with the theoretical calculations of TRIM-90.
The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for severa...The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for several targets.The explanation of this phenomenon by quasimolecular orbital energy level correlation diagrams and the possible application of Ni ion induced X-ray emission were discussed.展开更多
The stopping powers of CaF_(2) and MoO_(3) for ^(16)O and ^(19)F were measured with heavy-substrate Rutherford backscattering technique.The present results are compared with the prediction of Bragg's rule,and stro...The stopping powers of CaF_(2) and MoO_(3) for ^(16)O and ^(19)F were measured with heavy-substrate Rutherford backscattering technique.The present results are compared with the prediction of Bragg's rule,and strong deviation was observed.The experimental error is 5%or so.展开更多
文摘The MeV cluster beam of(C)_(2)^(+)ions has been bombarded on a copper target and K x-ray spectra of Cu have been measured with a Si(Li)detector.It is found that the K x-ray spectra of Cu induced by bombardment with 2.8 MeV(C)_(2)^(+)and 1.4 MeV C^(+)ions are almost the same.In contrast,K x-ray spectra of Cu induced by bombardment with 2.8 MeV(C)_(2)^(+)and 3.0 MeVSi^(+)ions are quite different.These interesting phenomena are discussed.
基金the National Natural Science Foundation of Chinathe Doctoral Program Foundation of Institute of Higher Education and the Postdoctoral Research Foundation.
文摘The energy loss and stopping power of ^(4)He ions in mylar foils were determined in a transmission geometry.The experimental stopping power data were compared to the previous measurements at higher energies.At lower energies,no previous measurements exist.The present results were also compared to the commonly used semiempirically theoretical predictions by Ziegler and Manoyan,and significant deviations were observed.
基金Supported by Doctoral Program Foundation of Institute of Higher Education,and Supported in part by the Zhongguancun Analytic and Measuring Center.
文摘Energy loss of 0.45-5.0 MeV 4He ions in Au and Ag films were measured with the Rutherford backscattering method,and the stopping powers at lower energy range were extracted by comparing with that determined by Anderson et al.at higher energy range.Significant deviation between the experimental data and the semiempirical calculations by TRIM-90 appears around the stopping maximum.The accuracy of our results was expected to be±l%.
文摘In this paper,the degree of alignment of 2P_(3/2) vacancy state in Au induced by proton,lithium and boron ion impact was measured using a Si(Li)detector.Also the projectile-energy dependence of the degree of alignment was investigated over the projectile energy range from 0.2 MeV/amu to 2.0MeV/amu.The de-alignment phenomenon was observed for small relative impact velocities.
基金Supported by Doctoral Programme Foundation of Institution of Higher Education。
文摘The stopping powers of Br and C in Ag Elm have been measured with the method of elastic recoil detection in energy range 0.28-0.42MeV/amu.The results have been compared with the theoretical calculations of TRIM-90.
文摘The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for several targets.The explanation of this phenomenon by quasimolecular orbital energy level correlation diagrams and the possible application of Ni ion induced X-ray emission were discussed.
基金Supported by the National Natural Science Foundation of Chinathe Doctoral Program Foundation of Institute of Higher Education.
文摘The stopping powers of CaF_(2) and MoO_(3) for ^(16)O and ^(19)F were measured with heavy-substrate Rutherford backscattering technique.The present results are compared with the prediction of Bragg's rule,and strong deviation was observed.The experimental error is 5%or so.
