Absolute total cross sections for electron-impact double ionization of He(1s2s3S) and He-(1s2s2p4P)

被引：3

作者：

Genevriez, Matthieu ^{[1
]}

Defrance, Pierre ^{[1
]}

Jureta, Jozo J. ^{[1
]}

Urbain, Xavier ^{[1
]}

机构：

[1] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain La Neuve, Belgium

来源：

EUROPEAN PHYSICAL JOURNAL D | 2019年 / 73卷 / 02期

关键词：

DOUBLE PHOTOIONIZATION; NEGATIVE-IONS; HELIUM; ATOMS;

D O I：

10.1140/epjd/e2018-90566-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the experimental determination of absolute, total cross sections for electron-impact double ionization of helium in its metastable 1s2s(3)S state and of the helium negative ion He-(1s2s2p(4)P). Cross sections are measured for impact energies ranging from threshold to 1000 eV using the animated crossed beams technique. The fast, pure beam of metastable helium required for the experiment is produced by photodetachment of fast He- ions. Results for He(1s2s(3)S) are compared to those for He(1s(21)S), and exhibit similar magnitude and behaviour. The cross section for He- is large compared to other negative ions and indicates the predominance of indirect ionization channels at large impact energies.

引用

页数：6

共 50 条

[21] Absolute cross section for Si2+(3s2 1S → 3s3p 1P) electron-impact excitation
Reisenfeld, DB
Gardner, LD
Janzen, PH
Savin, DW
Kohl, JL
PHYSICAL REVIEW A, 1999, 60 (02): : 1153 - 1164
[22] 2S2P2P P-4 STATE OF HE-
CHUNG, KT
PHYSICAL REVIEW A, 1995, 51 (01): : 844 - 846
[23] Double autoionization of He-(2s22p 2P)
Pindzola, M. S.
Robicheaux, F.
Colgan, J.
PHYSICAL REVIEW A, 2006, 73 (06):
[24] DIFFERENTIAL CROSS-SECTIONS FOR THE ELECTRON-IMPACT EXCITATION OF HE-LIKE IONS - 2(3)S AND 2(3)P
ITIKAWA, Y
SAKIMOTO, K
PHYSICAL REVIEW A, 1988, 38 (02): : 664 - 669
[25] AUTOIONIZATION STUDIES OF THE 1S2S2P4P5/2 LEVELS IN HE-, LI(I), AND BE(II)
MIECZNIK, G
BRAGE, T
FISCHER, CF
PHYSICAL REVIEW A, 1993, 47 (05): : 3718 - 3723
[26] DIFFERENTIAL AND INTEGRAL CROSS-SECTIONS FOR ELECTRON-IMPACT EXCITATION OF THE N(3)S, N(1)S AND N(3)P (N = 2, 3) LEVELS IN HE
TRAJMAR, S
REGISTER, DF
CARTWRIGHT, DC
CSANAK, G
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1992, 25 (22) : 4889 - 4910
[27] Absolute cross sections for near-threshold electron-impact excitation of the 3s(2) S-1->3s3p P-1 and 3s(2) S-1->3s3p P-3 transitions in Si2+
Wallbank, B
Djuric, N
Woitke, O
Zhou, S
Dunn, GH
Smith, ACH
Bannister, ME
PHYSICAL REVIEW A, 1997, 56 (05): : 3714 - 3718
[28] DIFFERENTIAL AND INTEGRAL CROSS-SECTIONS FOR EXCITATION OF 2(1S),2(3S) AND 2(3P) STATES OF HE BY ELECTRON-IMPACT AT 29.6 AND 40.1 EV
TRAJMAR, S
PHYSICAL REVIEW A, 1973, 8 (01): : 191 - 203
[29] Photodetechment of the 1s2s2p 4P state of He- from threshold to 100 eV
Phys Rev A, 1 (414):
[30] Photodetachment of the 1s2s2p P-4 state of He- from threshold to 100 eV
Kim, DS
Zhou, HL
Manson, ST
PHYSICAL REVIEW A, 1997, 55 (01): : 414 - 425

← 1 2 3 4 5 →