Resonance feature in Al- photodetachment below the Al(3s(2)4s(2)S) threshold

被引：7

作者：

Davies, BJ ^{[1
]}

Ingram, CW ^{[1
]}

Larson, DJ ^{[1
]}

Liu, CN ^{[1
]}

Starace, AF ^{[1
]}

机构：

[1] UNIV NEBRASKA, DEPT PHYS & ASTRON, LINCOLN, NE 68588 USA

来源：

PHYSICAL REVIEW A | 1997年 / 56卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.56.378

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photodetachment of Al-(3s(2)3p(23)P) near the threshold of the first excited state of neutral aluminum has been studied both experimentally and theoretically. A 19-keV mass-resolved Al- beam was intersected by a frequency-doubled neodymium-doped yttrium aluminum garnet pumped dye-laser beam, and the fast atoms created by detachment processes were detected. Measurements just below the threshold of the first excited state, Al(3s(2)4s S-2), find a large resonance peak in the detachment signal. An eigenchannel R-matrix calculation generates a resonance structure that is qualitatively similar to the data and identifies the large resonance peak as resulting from a doubly excited negative-ion state having predominantly (3s(2)4s4p (3)p(o)) character. Density plots of the resonance state are presented to demonstrate its structure. Near the Al(3s(2)3p P-2) threshold, theory agrees also with recent relative measurements of D. Calabrese et al. [Phys. Rev. A 54, 2797 (1996)].

引用

页码：378 / 385

页数：8

共 43 条

[31] DOUBLY EXCITED-STATES OF BERYLLIUM AND MAGNESIUM [J].

OMAHONY, PF ;

GREENE, CH .

PHYSICAL REVIEW A, 1985, 31 (01) :250-259

[32] Photodetachment of Li- from the Li 3s threshold to the Li 6s threshold [J].

Pan, C ;

Starace, AF ;

Greene, CH .

PHYSICAL REVIEW A, 1996, 53 (02) :840-852

[33] PARALLELS BETWEEN HIGH DOUBLY-EXCITED STATE SPECTRA IN H- AND LI- PHOTODETACHMENT [J].

PAN, C ;

STARACE, AF ;

GREENE, CH .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1994, 27 (08) :L137-L142

[34] RESONANCES IN ALKALI NEGATIVE-ION PHOTODETACHMENT AND ELECTRON AFFINITIES OF CORRESPONDING NEUTRALS [J].

PATTERSON, TA ;

HOTOP, H ;

KASDAN, A ;

NORCROSS, DW ;

LINEBERGER, WC .

PHYSICAL REVIEW LETTERS, 1974, 32 (05) :189-192

[35] CROSS-SECTION FOR THE PHOTODETACHMENT OF THE NEGATIVE-ION OF BORON [J].

RAMSBOTTOM, CA ;

BELL, KL .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1995, 28 (20) :4501-4508

[36] PROPENSITY RULES FOR RADIATIVE AND NONRADIATIVE DECAY OF DOUBLY-EXCITED STATES [J].

ROST, JM ;

BRIGGS, JS .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1990, 23 (14) :L339-L346

[37] DOMINANT PHOTODETACHMENT CHANNELS IN H- - COMMENT [J].

ROST, JM ;

BRIGGS, JS ;

FEAGIN, JM .

PHYSICAL REVIEW LETTERS, 1991, 66 (12) :1642-1642

[38] NONADIABATIC SELECTION-RULES FOR THE PHOTOABSORPTION OF H- AND HE [J].

SADEGHPOUR, HR .

PHYSICAL REVIEW A, 1991, 43 (11) :5821-5831

[39] EXTENSIVE EIGENCHANNEL R-MATRIX STUDY OF THE H- PHOTODETACHMENT SPECTRUM [J].

SADEGHPOUR, HR ;

GREENE, CH ;

CAVAGNERO, M .

PHYSICAL REVIEW A, 1992, 45 (03) :1587-1595

[40] FORMATION AND DECAY OF THE 3(1)4+ (1)P(O)AUTOIONIZING RESONANCE OF HELIUM [J].

SADEGHPOUR, HR ;

CAVAGNERO, M .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1993, 26 (11) :L271-L274

← 1 2 3 4 5 →