SELECTIVE EXCITATION OF PARABOLIC STARK STATES OF HE-I BY PROTON IMPACT

被引：11

作者：

BUTTRICH, S

VONOPPEN, G

机构：

[1] Institut für Strahlungs- und Kernphysik, Technische Universität Berlin, D-10623 Berlin

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.71.3778

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Resonancelike intensity variations of the impact radiation were observed at electric-field anticrossings of 1snl 1L and 3L Stark sublevels (n = 5,6,7; l greater-than-or-equal-to 2), when investigating excitation of helium atoms by 12.5 keV proton impact. The measured signal amplitudes provide strong evidence that the collision process excites the electron selectively to the (n1, n2, m) hydrogenic Stark states (0, n-1,0) and (0, n-2, +/-1), indicating that the electron is promoted along in-saddle sequences of H-2+-like molecular orbitals during the final phase of the collision.

引用

页码：3778 / 3781

页数：4

共 17 条

[1] EXPERIMENTALLY DETERMINED DENSITY-MATRICES FOR H(N=3) FORMED IN H+-HE COLLISIONS FROM 20 TO 100 KEV [J].

ASHBURN, JR ;

CLINE, RA ;

VANDERBURGT, PJM ;

WESTERVELD, WB ;

RISLEY, JS .

PHYSICAL REVIEW A, 1990, 41 (05) :2407-2421

[2] ELECTRIC-DIPOLE MOMENTS OF IMPACT-EXCITED HE ATOMS [J].

AYNACIOGLU, AS ;

HEUMANN, S ;

VONOPPEN, G .

PHYSICAL REVIEW LETTERS, 1990, 64 (16) :1879-1882

[3] PROTON-IMPACT EXCITATION OF HE I TRIPLET LEVELS [J].

AYNACIOGLU, AS ;

VONOPPEN, G ;

MULLER, R .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1987, 6 (02) :155-162

[4] ELECTRIC-DIPOLE MOMENTS OF HE ATOMS EXCITED BY HE-HE COLLISIONS [J].

HANSELMANN, M ;

AYNACIOGLU, AS ;

VONOPPEN, G .

PHYSICS LETTERS A, 1993, 175 (05) :314-321

[5] OBSERVATION OF A LARGE ELECTRIC-DIPOLE MOMENT PRODUCED IN ELECTRON-TRANSFER COLLISIONS OF H+ ON HE [J].

HAVENER, CC ;

WESTERVELD, WB ;

RISLEY, JS ;

TOLK, NH ;

TULLY, JC .

PHYSICAL REVIEW LETTERS, 1982, 48 (14) :926-929

[6] ALIGNMENT OF H(2P) FOLLOWING H+-HE, AR CHARGE-CHANGING COLLISIONS [J].

HIPPLER, R ;

HARBICH, W ;

FAUST, M ;

LUTZ, HO ;

DUBE, LJ .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1986, 19 (10) :1507-1514

[7] POLARIZATION STUDIES OF H(2P) CHARGE-EXCHANGE EXCITATION - H+-HE COLLISIONS [J].

HIPPLER, R ;

FAUST, M ;

WOLF, R ;

KLEINPOPPEN, H ;

LUTZ, HO .

PHYSICAL REVIEW A, 1987, 36 (10) :4644-4651

[8] COHERENT EXCITATION OF H(N=2) IN H+, H-HE COLLISIONS [J].

HIPPLER, R ;

PLOTZKE, O ;

HARBICH, W ;

MADEHEIM, H ;

KLEINPOPPEN, H ;

LUTZ, HO .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1991, 18 (01) :61-67

[9] ELECTRIC-FIELD SINGLET TRIPLET ANTICROSSINGS OF HE-1 [J].

KAISER, D ;

LIU, YQ ;

VONOPPEN, G .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1993, 26 (03) :363-380

[10] COLLISIONAL COHERENT EXCITATION TO THE N=2 STATE OF HYDROGEN [J].

KROTKOV, R ;

STONE, J .

PHYSICAL REVIEW A, 1980, 22 (02) :473-482

← 1 2 →