Spin and Angular Momentum in Strong-Field Ionization.
Spin and Angular Momentum in Strong-Field Ionization.
复制标题
DOI：
10.1103/physrevlett.120.043202
复制
发表时间：
2017-11
影响因子：
8.6
通讯作者：
D. Trabert;A. Hartung;S. Eckart;F. Trinter;A. Kalinin;M. Schöffler;L. Schmidt;T. Jahnke;M. Kunitski;R. Dörner
中科院分区：
文献类型：
--
作者：
D. Trabert;A. Hartung;S. Eckart;F. Trinter;A. Kalinin;M. Schöffler;L. Schmidt;T. Jahnke;M. Kunitski;R. Dörner
测量了波长为6×10^{13} W/cm^{2}的395 nm圆偏振激光脉冲对氘氚多光子电离产生的电子自旋极化。在此光子能量为3.14 eV时，基态（J=3/2，电离势I_{p}=12.1 eV）和第一激发态（J=1/2，I_{p}=13.4 eV）的电子能量分布明显分离。这两个梳的阈值以上的电离峰显示相反的自旋极化。对于J=1/2，自旋极化的大小比对于J=3/2最终离子状态高2倍。反过来，数据表明电离概率强烈依赖于磁量子数的符号。
The spin polarization of electrons from multiphoton ionization of Xe by 395 nm circularly polarized laser pulses at 6×10^{13} W/cm^{2} has been measured. At this photon energy of 3.14 eV the above-threshold ionization peaks connected to Xe^{+} ions in the ground state (J=3/2, ionization potential I_{p}=12.1 eV) and the first excited state (J=1/2, I_{p}=13.4 eV) are clearly separated in the electron energy distribution. These two combs of above-threshold ionization peaks show opposite spin polarizations. The magnitude of the spin polarization is a factor of 2 higher for the J=1/2 than for the J=3/2 final ionic state. In turn, the data show that the ionization probability is strongly dependent on the sign of the magnetic quantum number.