Optical Spectroscopy of Molecular Positronium

被引：51

作者：

Cassidy, D. B. ^{[1
]}

Hisakado, T. H. ^{[1
]}

Tom, H. W. K. ^{[1
]}

Mills, A. P., Jr. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 13期

基金：

美国国家科学基金会;

关键词：

RESONANCES;

D O I：

10.1103/PhysRevLett.108.133402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report optical spectroscopic measurements of molecular positronium (Ps(2)), performed via a previously unobserved L = 1 excited state. Ps(2) molecules created in a porous silica film, and also in vacuum from an Al(111) crystal, were resonantly excited and then photoionized by pulsed lasers, providing conclusive evidence for the production of this molecular matter-antimatter system and its excited state. Future experiments making use of the photoionized vacuum L = 1 Ps(2) could provide a source of Ps(+) ions, as well as other multipositronic systems, such as Ps(2)H(-) or Ps(2)O.

引用

页数：5

共 31 条

[1] The positive electron [J].

Anderson, CD .

PHYSICAL REVIEW, 1933, 43 (06) :491-494

[2]

[Anonymous], 2005, Oxford master series in physics

[3] Evidence for positronium molecule formation at a metal surface [J].

Cassidy, D. B. ;

Deng, S. H. M. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW A, 2007, 76 (06)

[4] Accumulator for the production of intense positron pulses [J].

Cassidy, D. B. ;

Deng, S. H. M. ;

Greaves, R. G. ;

Mills, A. P., Jr. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2006, 77 (07)

[5] Single shot positron annihilation lifetime spectroscopy [J].

Cassidy, D. B. ;

Deng, S. H. M. ;

Tanaka, H. K. M. ;

Mills, A. P., Jr. .

APPLIED PHYSICS LETTERS, 2006, 88 (19)

[6] The production of molecular positronium [J].

Cassidy, D. B. ;

Mills, A. P., Jr. .

NATURE, 2007, 449 (7159) :195-197

[7] Efficient Production of Rydberg Positronium [J].

Cassidy, D. B. ;

Hisakado, T. H. ;

Tom, H. W. K. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2012, 108 (04)

[8] Enhanced Ps-Ps Interactions due to Quantum Confinement [J].

Cassidy, D. B. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2011, 107 (21)

[9] New Mechanism for Positronium Formation on a Silicon Surface [J].

Cassidy, D. B. ;

Hisakado, T. H. ;

Tom, H. W. K. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2011, 106 (13)

[10] Cavity Induced Shift and Narrowing of the Positronium Lyman-α Transition [J].

Cassidy, D. B. ;

Bromley, M. W. J. ;

Cota, L. C. ;

Hisakado, T. H. ;

Tom, H. W. K. ;

Mills, A. P., Jr. .

PHYSICAL REVIEW LETTERS, 2011, 106 (02)

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