The single-electron capture cross sections for the impact of rare-earth ions Ce^(+),Ho^(+)on H_(2)are measured in the energy range 3-8keV by'growth rate'method.The measurement also reveals that the incident io...The single-electron capture cross sections for the impact of rare-earth ions Ce^(+),Ho^(+)on H_(2)are measured in the energy range 3-8keV by'growth rate'method.The measurement also reveals that the incident ions are predominantly in ground state.展开更多
The cross sections of electron capture for 3-10 keV proton traversing H_(2) were measured by using the‘growth rate’method.The experimental procedure is described.The experimental results are in good agreement with t...The cross sections of electron capture for 3-10 keV proton traversing H_(2) were measured by using the‘growth rate’method.The experimental procedure is described.The experimental results are in good agreement with the recommended data.展开更多
A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.Th...A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.展开更多
The optical isotope shifts,of five even isotopes of neodymium have been measured by using collinear ion beam laser spectroscopy(CZBLS).Isotopically pure NdII ions with energy of 30ke V from an isotope separator were c...The optical isotope shifts,of five even isotopes of neodymium have been measured by using collinear ion beam laser spectroscopy(CZBLS).Isotopically pure NdII ions with energy of 30ke V from an isotope separator were collinearly interacted with light from a tunable dye laser and selectively excited from a metastable level of 4f^(4) 5d^(6) K_(9/2) to the(23537)_(9/2)^(0) level by Doppler tuning technique.The resonant excitation frequency values for each Nd isotope with mass number of 142,144,146,148 and 150 were obtained.After the separation of the normal and specific mass shift and the field shift from the experimentally measured isotope shift,the configuration of the(23537)_(9/2)^(0),level was decomposed into 4f^(4)6p,4f^(3)5d^(2) and 4f^(3)5d6p,and their fractions,for the first time.were determined to be 0.12-0.13,0.88-0.85 and 0-0.02,respectively.展开更多
The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the...The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the SOkeV Ndll ion beam and tunable collinear dye laser which resonantly ezcited a metastable level to the(23537)°_(9/2) level,and by the observation of its time-resolved decay downstream.The lifetime value obtained from a fit program was 27.6±0.9ns.The result may provide a possibility of determining the unknown configuration of the(23537)°_(9/2) level.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘The single-electron capture cross sections for the impact of rare-earth ions Ce^(+),Ho^(+)on H_(2)are measured in the energy range 3-8keV by'growth rate'method.The measurement also reveals that the incident ions are predominantly in ground state.
基金Supported by the National Natural Science Foundation of China。
文摘The cross sections of electron capture for 3-10 keV proton traversing H_(2) were measured by using the‘growth rate’method.The experimental procedure is described.The experimental results are in good agreement with the recommended data.
基金the National Natural Science Foundation of Chinapartially by YOK YING TONG Educational Foundation.
文摘A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.
文摘The optical isotope shifts,of five even isotopes of neodymium have been measured by using collinear ion beam laser spectroscopy(CZBLS).Isotopically pure NdII ions with energy of 30ke V from an isotope separator were collinearly interacted with light from a tunable dye laser and selectively excited from a metastable level of 4f^(4) 5d^(6) K_(9/2) to the(23537)_(9/2)^(0) level by Doppler tuning technique.The resonant excitation frequency values for each Nd isotope with mass number of 142,144,146,148 and 150 were obtained.After the separation of the normal and specific mass shift and the field shift from the experimentally measured isotope shift,the configuration of the(23537)_(9/2)^(0),level was decomposed into 4f^(4)6p,4f^(3)5d^(2) and 4f^(3)5d6p,and their fractions,for the first time.were determined to be 0.12-0.13,0.88-0.85 and 0-0.02,respectively.
基金Supported by The Chinese National Science Foundation for Doctoral Research。
文摘The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the SOkeV Ndll ion beam and tunable collinear dye laser which resonantly ezcited a metastable level to the(23537)°_(9/2) level,and by the observation of its time-resolved decay downstream.The lifetime value obtained from a fit program was 27.6±0.9ns.The result may provide a possibility of determining the unknown configuration of the(23537)°_(9/2) level.
