New Directions in Antimatter Chemistry and Physics

This volume is the outgrowth of a workshop held in October, 2000 at the Institute for Theoretical Atomic and Molecular Physics at the Harvard- Smithsonian Center for Astrophysics in Cambridge, MA. The aim of this book (similar in theme to the workshop) is

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New Directions in Antimatter Chemistry and Physics Edited by

Clifford M. Surko Professor of Physics, Physics Department, University of California, San Diego, U.S.A. and

Franco A. Gianturco Professor of Chemical Physics, Dipartimento di Chimica, Università di Roma “La Sapienza ”, Rome, Italy

KLUWER ACADEMIC PUBLISHERS NEW YORK, BOSTON, DORDRECHT, LONDON, MOSCOW

eBook ISBN: Print ISBN:

0-306-47613-4 0-7923-7152-6

©2002 Kluwer Academic Publishers New York, Boston, Dordrecht, London, Moscow Print ©2001 Kluwer Academic Publishers Dordrecht All rights reserved No part of this eBook may be reproduced or transmitted in any form or by any means, electronic, mechanical, recording, or otherwise, without written consent from the Publisher Created in the United States of America Visit Kluwer Online at: and Kluwer's eBookstore at:

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Contents ix

Preface I.

Positron Sources and Beams

1.

A laser-cooled positron plasma B. M. Jelenkovic, J. J. Bellinger, A. B. Newbury, T. B. Mitchell and W. M. Itano

2.

3.

1

Trap-based positron beams R. G. Greaves and C. M. Surko

21

Intense radioisotope sources for spin polarized positron beams F. Saito, T. Hyodo, Y. Nagashima, T. Kurihara, N. Suzuki Y. Itoh, and A. Goto

35

II.

Antihydrogen, Bose-Condensed Positronium, and Positrons in Materials

4.

Collisions of H and Alexander Dalgarno, Piotr Froelich, Svante Jonsell, Alejandro Saenz, and Bernard Zygelman

47

Positron physics in a new perspective: Low-energy antihydrogen scattering by simple atoms and molecules E. A. G. Armour and C. W. Chamberlain

53

The Bose-Einstein condensation of positronium in submicron cavities D. B. Cassidy and J. A. Golovchenko

83

5.

6.

7.

8.

9.

Cooling and quenching of positronium in porous material Haruo Saito and Toshio Hyodo

101

New experiments with bright positron and positronium beams A. P. Mills, Jr. and P. M. Platzman

115

Positron states in materials: density functional and quantum monte carlo studies Bernardo Barbiellini

127

vi 10.

Depth-profiled positron annihilation spectroscopy of thin insulating films D. W. Gidley, K. G. Lynn, M. P. Petkov, M. H. Weber J. N. Sun, and A. F. Yee

151

III.

Positron and Positronium Interactions with Atoms

11.

The scattering of positrons and positronium by atomic targets H. R. J. Walters, Jennifer E. Blackwood and Mary T. McAlinden

173

Positronic atoms J. Mitroy, M. W. J. Bromley and G. G. Ryzhikh

199

Perspectives on physics with low energy positrons: fundamentals, beams and scattering Michael Charlton

223

Positron chemistry by quantum monte carlo Massimo Mella, Simone Chiesa, Dario Bressanini, and Gabriele Morosi

235

Antimatter compounds D. M. Schrader and J. Moxom

263

Positronium-atom/molecule interactions: momentum-transfer cross sections and Y. Nagashima, F. Saito, N. Shinohara, and T. Hyodo

291

Correlations between cross sections and threshold energies for positronium formation and direct ionization J. W. Humberston, P. Van Reeth and G. Laricchia

303

12.

13.

14.