Measurement of quantum defects of nS and nD states using field ionization spectroscopy in ultracold cesium atoms  

作　　者：张临杰 冯志刚 李安玲 赵建明 李昌勇 贾锁堂 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,College of Physics and Electronics Engineering,Shanxi University

出　　处：《Chinese Physics B》2009年第5期1838-1842,共5页中国物理B（英文版）

基　　金：supported by the 973 Program of China(Grant No 2006CB921603);the National Natural Science Foundation of China (Grant Nos 10574084,60678003 and 60778008);the Special Foundation for State Major Basic Research Program of China(Grant No 2005CCA06300);the Scholarship Foundation of Shanxi Province,China

摘　　要：This paper reports that ultracold atoms are populated into different nS and nD Rydberg states （n=25-52） by two-photon excitation. The ionization spectrum of an ultracold Rydberg atom is acquired in a cesium magneto-optical trap by using the method of pulse field ionization. This denotes nS and nD states in the ionization spectrum and fits the data of energy levels of different Rydberg states to obtain quantum defects of nS and nD states.This paper reports that ultracold atoms are populated into different nS and nD Rydberg states （n=25-52） by two-photon excitation. The ionization spectrum of an ultracold Rydberg atom is acquired in a cesium magneto-optical trap by using the method of pulse field ionization. This denotes nS and nD states in the ionization spectrum and fits the data of energy levels of different Rydberg states to obtain quantum defects of nS and nD states.

关 键 词：ultracold Rydberg atoms quantum defect field ionization spectrum two-photon excitation 

分 类 号：O431.2[机械工程—光学工程] O562.3[理学—光学]