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
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 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
From an inelastic excitation and breakup experiment with a12Be beam at 29 MeV/u,a large4He+8He cluster decay width of 1.1(2)MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0...From an inelastic excitation and breakup experiment with a12Be beam at 29 MeV/u,a large4He+8He cluster decay width of 1.1(2)MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0+.By using the R-matrix analysis,a cluster spectroscopic factor of 0.53(10)is extracted from the cluster partial width,providing a strong support for the clustering structure in12Be.A specially designed zero-degree telescope played an essential role in the present experiment and has been demonstrated to be a promising tool in future studies of the molecular-like resonances near the cluster separation threshold.展开更多
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%.
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.
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.
基金supported by the National Basic Research Program of China(Grant No.2013CB834402)the National Natural Science Foundation of China(Grant Nos.11035001,11275011,11235001,11320101004 andJ1103206)
文摘From an inelastic excitation and breakup experiment with a12Be beam at 29 MeV/u,a large4He+8He cluster decay width of 1.1(2)MeV is determined for a state at an excitation energy of 10.3 MeV and with a spin parity of 0+.By using the R-matrix analysis,a cluster spectroscopic factor of 0.53(10)is extracted from the cluster partial width,providing a strong support for the clustering structure in12Be.A specially designed zero-degree telescope played an essential role in the present experiment and has been demonstrated to be a promising tool in future studies of the molecular-like resonances near the cluster separation threshold.
