PRECISION-MEASUREMENT OF STRONG-FIELD DOUBLE-IONIZATION OF HELIUM

被引：953
作者：
WALKER, B
SHEEHY, B
DIMAURO, LF
AGOSTINI, P
SCHAFER, KJ
KULANDER, KC
机构：
[1] CTR ETUD SACLAY,SERV RECH SURFACES & IRRADIAT MAT,F-91191 GIF SUR YVETTE,FRANCE
[2] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551
[3] UNIV COLORADO,JOINT INST LAB ASTROPHYS,BOULDER,CO 80309
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.73.1227
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The production of He+ and He-2+ by a 160 fs, 780 nm laser has been measured over an unprecedented 12 orders of magnitude in counting range. Enhanced double electron emission, called nonsequential (NS) ionization. was observed over an intensity range where the single ionization dynamics is evolving from multiphoton to pure tunneling. The NS yield is found to scale with the ac-tunneling rate for the neutral, even when tunneling is not the dominant ionization pathway. A rescattering mechanism fails to predict the observed NS threshold or magnitude.
引用
收藏
页码：1227 / 1230
页数：4
相关论文
共 14 条
[1]  
AMMOSOV MV, 1986, ZH EKSP TEOR FIZ, V64, P1191
[2]   ABOVE-THRESHOLD IONIZATION IN THE LONG-WAVELENGTH LIMIT [J].
CORKUM, PB ;
BURNETT, NH ;
BRUNEL, F .
PHYSICAL REVIEW LETTERS, 1989, 62 (11) :1259-1262
[3]   PLASMA PERSPECTIVE ON STRONG-FIELD MULTIPHOTON IONIZATION [J].
CORKUM, PB .
PHYSICAL REVIEW LETTERS, 1993, 71 (13) :1994-1997
[4]   ENERGY AND ANGULAR ELECTRON-SPECTRA FOR THE TUNNEL IONIZATION OF ATOMS BY STRONG LOW-FREQUENCY RADIATION [J].
DELONE, NB ;
KRAINOV, VP .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1991, 8 (06) :1207-1211
[5]   OBSERVATION OF NONSEQUENTIAL DOUBLE IONIZATION OF HELIUM WITH OPTICAL TUNNELING [J].
FITTINGHOFF, DN ;
BOLTON, PR ;
CHANG, B ;
KULANDER, KC .
PHYSICAL REVIEW LETTERS, 1992, 69 (18) :2642-2645
[6]   WAVELENGTH DEPENDENCE OF NONSEQUENTIAL DOUBLE-IONIZATION IN HE [J].
KONDO, K ;
SAGISAKA, A ;
TAMIDA, T ;
NABEKAWA, Y ;
WATANABE, S .
PHYSICAL REVIEW A, 1993, 48 (04) :R2531-R2533
[7]   ELECTRON-IMPACT IONIZATION CROSS-SECTIONS AND IONIZATION RATE COEFFICIENTS FOR ATOMS AND IONS FROM HYDROGEN TO CALCIUM [J].
LOTZ, W .
ZEITSCHRIFT FUR PHYSIK, 1968, 216 (03) :241-&
[8]   SINGLE AND DOUBLE IONIZATION OF HE BY ELECTRONS [J].
MITTLEMAN, MH .
PHYSICAL REVIEW LETTERS, 1966, 16 (12) :498-+
[9]   PLATEAU IN ABOVE-THRESHOLD IONIZATION SPECTRA [J].
PAULUS, GG ;
NICKLICH, W ;
XU, HL ;
LAMBROPOULOS, P ;
WALTHER, H .
PHYSICAL REVIEW LETTERS, 1994, 72 (18) :2851-2854
[10]   AN EVALUATED COMPILATION OF THEORETICAL DATA SOURCES FOR ELECTRON-IMPACT EXCITATION OF ATOMIC IONS [J].
PRADHAN, AK ;
GALLAGHER, JW .
ATOMIC DATA AND NUCLEAR DATA TABLES, 1992, 52 (02) :227-317
12