***************************************************************
**** ****
**** ESF Programme ****
**** ****
**** RELATIVISTIC EFFECTS IN HEAVY ELEMENT CHEMISTRY ****
**** AND PHYSICS ****
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Newsletter No. 25 (June 16, 1997)
______________________________________________________________
Editor: Bernd Hess, hess@uni-bonn.de
Tel. 49-228-732920
FAX 49-228-732551
______________________________________________________________
The programme 'Relativistic Effects in Heavy-Element Chemistry and Physics'
('REHE') has been initiated by the European Science
Foundation in November 1992 and it is expected to run for 5 years, i.e.
from 1993 through 1997. The programme is intended to strengthen the in-
dicated "field" and to facilitate interactions between European scientists
concerned with related topics.
The 'Steering Committee' of the programme has at present the following
members:
E. J. Baerends (Amsterdam)
J.P. Daudey (Toulouse)
K. Faegri (Oslo)
I.P. Grant (Oxford)
B. Hess (Bonn, Vice-Chairman)
J. Karwowski (Torun)
P. Pyykko (Helsinki, Chairman)
K. Schwarz (Vienna)
A. Sgamellotti (Perugia)
C. Werner (ESF).
================================================================================
--- E D I T O R I A L
Please send material for the forthcoming newsletter to my attention,
hess@uni-bonn.de
The newsletter will be sent out every second month around the 10th day
of the month. Contributions should arrive in Bonn until the end of the
preceding month.
| The next newsletter (#26) is scheduled for August 1997.
Please send material >by e/mail< that enables us to fill the
following topics in forthcoming newsletters
All REHE newsletters are available on www under URL
http://pcgate.thch.uni-bonn.de/tc/hess/esf/nl.html
see also the URL of the European Science Foundation
http://www.esf.c-strasbourg.fr
================================================================================
--- F E L L O W S H I P S
In the framework of the REHE programme, there is support available
for visits of doctoral students and also for senior scientists at
institutions in a foreign partner country. This support covers visits
lasting 2-4 months ("long-term visits") which will give the holders
time to acclimatize to the methods used in the host laboratory as well as
short visits ("short-term visits") of only a few days.
Please send a short application detailing the project, the names of the
scientists involved and the aproximate date and duration of the visit
to either Pekka Pyykko or Bernd Hess. Please refer to REHE newsletter #16
for details.
Please indicate >who wants to go >when >where, >what shall be done and
>how much money (in FRF) is required.
As a rule, the steering committee members will decide on the applications
on occation of ther meetings.
Applications for visits that require decision in the interim time between
steering committee meetings may still be handled by means of consultation
within the steering group.
After the journey, a short report about the scientific accomplishments
is required. Please send a version by e-mail in a form suitable for
publication in a REHE newsletter to hess@uni-bonn.de
Should the planned dates of your stay change for any reason, you are
requested to notify the Chairman and the Vice-Chairman (preferrably by
e-mail) as soon as possible with a copy to the ESF.
================================================================================
--- R E S E A R C H N E W S AND R E L A T E D I N F O R M A T I O N
Summaries of recent research or comments to it (up to 1 page),
which are of general interest to the 'REHE' community, may
be submitted by any colleague preferrably by E-mail to my attention.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Gerhard Soff
Report on the work performed by Igor.~A. Goidenko
during the research visit in Dresden
\documentstyle[12pt]{article}
\begin{document}
\pagestyle{empty}
\begin{center}
{\bf Report on the work performed by Igor.~A. Goidenko
during the research visit in Dresden}
\end{center}
Drastic improvements in Lamb shift measurements of highly charged
heavy ions demand accompanying theoretical predictions of the same
quality. This requires an exact non-perturbative calculation of
all QED corrections of second order in
the fine-structure constant $\alpha$.
The major difficulty in performing these calculations is the
treatment of the two-photon self-energy (SESE) diagrams. Both
at St.~Petersburg and also at Dresden currently efforts are
undertaken to compute the corresponding contributions.
Whereas one of the diagrams (``SESE(irr)'') can be handled nowadays,
for the other (``SESE(red)'') only a proper Pauli-Villars
regularization scheme existed up to now. During the research stay
at Dresden this scheme was employed to obtain the finite part of
the full diagram. Similarities to a corresponding calculation
for the first-order self energy were detected. Therefore
a set of yet unproven but very convincing sum rules
together with a new multiple commutator expansion
(L.~N.~Labzowsky and I.~A.~Goidenko, J.~Phys.~B30 (1997) 177)
could be
utilized for tackling the analytical problems of the work.
A number of new sum rules was found. These appear to be even more
sophisticated than that of the first-order problem. A strict
proof of these new sum rules could not yet be performed.
Anyhow, with their help it was possible to derive the
complete analytical expressions for the
SESE(red) contribution. The cancellation of the
divergent part was found for the whole set
of diagrams. Therefore at present only the
proof of the utitlized sum rules and some numerical
computations seem to be left for the final solution
of the second-order self-energy problem. The evaluation
of computer programs for the numerical work was already started,
and one of the three terms which form the SESE(red)
diagram could be calculated in principle. The remaining
programming will be continued in St.~Petersburg. It does
not seem to be a problem, whereas the final analytical
proof of the sum rules might require more analytical work.
Throughout the stay at Dresden, however, many new ideas
concerning
the solution of the sum rule problem were discussed, and
it seems that the fruitful cooperation between the
QED research groups at Dresden and St.~Petersburg will
finally be able to solve the total SESE problem.
I. Goidenko is most grateful to all his German
colleagues for many stimulating and fruitful discussions.
\end{document}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Maria Tokman]
Report on Maria Tokman's stay at Tel Aviv University, REHE grant 11-97
{\bf Scientific:} The visitor worked at TAU from 5th May to 4th June 1997.
The purpose of this visit was to develop the relativistic coupled cluster code
of Kaldor, Ishikawa and Eliav for the calculations of nuclear quadrupole
moments. This coupled-cluster method is able to take into account both
relativistic and electron correlation effects. The present problem requires a
finite-field treatment. The additional nuclear quadrupole term
should be added to the Hamiltonian. Instead of spherical, it has axial symmetry.
During the visit, the theoretical part of this project was
done. New formulas for the representation of matrix elements were obtained.
The axially symmetrical integrands were expressed in terms of spherically
symmetrical ones. Parts of the new approach were programmed.
Maria Tokman
Ph.D., Research Scientist
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Vlado Kelloe]
Report (Part 2)
---------------
on reserach carried out by Professor Vladimir Kelloe (Bratislava) at the Department of
Theoretical Chemistry, University of Lund in the period May 2, 1997 - June 14, 1997
supported by the REHE travel grant No. 1-97
This is a report on the second part of the joint project involving Professors
Vladimir Kelloe and Miroslav Urban of Bratislava and Andrzej J. Sadlej of Lund.
It refers to 6-weeks stay of Professor Vladimir Kelloe in Lund. This stay was supported
from the local funds while the travel expenses are to be covered from the REHE grant.
The report on the first part of this joint research has been submitted to the Steering
Committee of REHE in February 1997.
With the objective to study the effect of intermolecular forces on electric field
gradients at heavy nuclei we have reconsidered first the methods of their calculations.
Following the recent research on the picture change effect on expectation values
(M. Barysz&A.J.Sadlej, Theor. Chim. Acta, in the press) we have analysed this problem
for electric field gradients. As could have been expected from the form of the electric
field gradient operator, its calculated values significantly depend on the picture change.
A numerical method, based on the finite nuclear quadrupole model forwarded by P.
Schwerdtfeger (REHE conference, Granada, 1997), which permits computationally convenient
way of computing electric field gradients in the changed picture, has been analysed
and applied to a number of test cases. A paper on this subject has been submitted for
publication:
(1) V. Kelloe and A. J. Sadlej, The Picture Change and Calculations of Expectation
Values in Approximate Relativistic Theories, Int. J. Quantum Chem., submitted
for publication.
The methods developed in this paper have been further use to calculate the electric field
gradient in GeO and GeS with the purpose to determine the nuclear quadrupole moment of
73Ge. A paper reporting on this study is about to be submitted for publication:
(2) V. Kelloe and A. J. Sadlej, The nuclear quadrupole moment of 73Ge from molecular
microwave data, Mol. Phys., to be submitted
A similar study of the 39K nuclear quadrupole moment based on molecular data for KF and KCl
is about to be completed.
We have also returned to the problem of certain discrepancies in the calculated values of
the dipole moment of SnO and PbO observed in our earlier investigations (V. Kelloe&
A. J. Sadlej, J. Chem. Phys. 98 (1993) 1345). The present study is based on the Douglas-Kroll
approach and combined CASSCF/CASPT2 and CC schemes for the calculation of the electron
correlation contribution and is additionally supported by Dirac-Hartree-Fock results. A paper
on this subject is ready for submission:
(3) V. Kelloe, A. J. Sadlej, and K. Faegri, Jr., Electron correlation and relativistic
contributions to heavy oxides and sulfides: SnO, PbO, SnS, and PbS, J. Chem. Phys.,
to be submitted
All these results combine with those given in the Part I of the report on the research
project No. 1-97 which resulted in the following paper:
(4) M. Urban and A. J. Sadlej, Binding of aluminium to coinage metals: Electron correlation
and relativistic effects, Molec. Phys., in the press.
Vladimir Kelloe Andrzej J. Sadlej
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Maria Barysz]
Report
--------
on the results of the joint research project: 'Approximate one-
and two-component relativistic hamiltonians of arbitrary high accuracy'
supported by the REHE grant No. 18-96 to Dr. Maria Barysz
Participants: Dr. Maria Barysz
Institute of Chemistry,
University of Silesia, Katowice, Poland
and
Prof. Andrzej J. Sadlej
Theoretical Chemistry,
University of Lund, Lund, Sweden
The REHE support was granted to Dr. Maria Barysz of the University of Silesia,
Katowice, Poland to cover her living expenses in Lund for the period of 4 month
as well as the travel expenses. The stay of Dr. Barysz at the Department of
Theoretical Chemistry, University of Lund, Lund, Sweden has been commenced in
the period January 19, 1997 - May 21, 1997.
The research carried out during these four month comprises several mutually
related problems of approximate relativistic methods of quantum chemistry. The
main attention has been given to the methods of calculation of expectation values
in approximate relativistic theories. It has been shown that essentially all
approximate relativistic methods which can be derived from Dirac's or many-electron
Dirac's theories require that the accompanying change of picture is taken into
account when calculating the expectation values. A proof has been given that
the change of picture enters already the term of alpha**2. The corresponding
formalism and some numerical/analytical illustration have been given in the following
paper:
(1) M. Barysz and A. J. Sadlej, Expectation values of operators in approximate
2-component relativistic theories, Theor. Chim. Acta, in the press
The problem of the accuracy of non-relativistic wave functions in perturbative calculations
of relativistic corrections has been considered in a separate study. In the first-order
with respect to the fine structure constant the use of the direct perturbation theory
has been shown to be advantageous in comparison with the Pauli approximation. This
suggests that the operator which appears in the first-order DPT energy formula can
be used in higher-order methods as a substitute for the Pauli operator. The results
obtained in this study form a separate publication:
(2) M. Barysz, Perturbation theory of relativistic effects: Relative inacuracies
of approximate results, Chem. Phys. Lett. , in the press.
The material of these two papers has been also presented on the REHE Conference
in Garnada (March 1997) in the form of two posters, ane authored by MB&AJS and another
one by MB.
During M. Barysz's stay in Lund, professor P. Pyykkv proposed a joint study of strongly
bound ionic diatomic molecules involving gold. Such calculations have been performed
at the level of the CASSCF/CASPT2 approximation with relativistic effects accounted
for by using the Dauglas-Kroll method. The results will be pubished:
(3) M.Barysz and P. Pyykkv, Strong chemical bonds to gold. CASPT2 results for
diatomic AuBe+, AuC+, AuMg+ and AuSi+, Chem. Phys. Lett., submitted for publication.
Simultaneously M. Barysz was involved in the software development and building the
relativistic methods into the coming release of the Molcas Sysetm of Quantum
Chemistry Programs. This work will be continued during Summer 1997 and funded
by a local grant.
Maria Barysz Andrzej J. Sadlej
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
================================================================================
--- C O N F E R E N C E N E W S
'Conference News' (in general they should NOT overrun about 1 page)
may be provided by organizers or their scientific secretaries. --
For meetings and workshops supported by ESF the submission of such
a report is a m u s t . To facilitate my job the reports should
be forwarded to my attention via E-mail.
Also please send information about conferences that might be of interest
for the members of the REHE community.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Burkhard Fricke]
Report on the 4. Workshop on
"PHYSICS AND CHEMISTRY OF THE HEAVIEST ELEMENTS"
This Workshop, held from June 5-8, 1997 at Stenungsbaden Yacht Club
near Goeteborg in Sweden, was co-sponsered by the European Science
Foundation. The Organizers as well as all 47 participants would like to
thank the ESF for this financial help.
The weather was excellent, the organization perfect and the scientific
contence of very high standard.
Goal of the workshop was an update of our knowledge of the chemistry of
the Transactinide Elements which sometimes are also called "Superheavy
Elements". Special interest was on the elements 103 to 106 as well as the
outlook for theoretical results and chemical possibilities for the
elements 107, 108 and 109.
It was the first time in this series of workshops that a seperate Theory
session was organized. Fricke from Kassel reported on the "old" atomic
calculations of superheavy atoms with emphasis on the chemical
interpretation. Kaldor from Tel Aviv reported on the newest coupled
cluster atomic results for these elements. In a second part the results of
relativistic molecular calculations and their interpretation for the
chemical behaviour was given by Pershina from GSI and Malli from Vancouver
with his Dirac-Fock-Breit calculations. Teichteil from Toulouse showed in
his contribution the power of a Pseudopotential approximation for simple
molecules with very heavy elements.
After this introduction the real chemical part started which was divided
in three parts. One was a general discussion of the heavy element programs
at Berkeley (Hoffmann), Dubna (Itkis) and at GSI (Hessberger). It became
clear that the production of these very heavy elements will be as low as a
few picobarn for 107 and 108, but they all were optimistic that this could
be done and chemical experiments were feasable. And they all were
otimistic that these elements have isotopes with lifetimes of the order of
10 seconds or above.
The other two sections were Gas/thermochromatography and Aqueous
Chemistry, both with 11 contributions each. Both sections concentrated on
the discussion of the chemical behaviour and interpretative problems for
the elements 104, 105 and 106. In addition the chemical behaviour was
discussed for other isotopes of "normal" elements but under the condition
of one atom at a time. The contributions came from the Bern/PSI group
(Gaeggeler, Tuerler, Gaertner, Eichler, Dressler), the GSI group (Bruechle
and Schaedel), the Dresden group (Vahle, Grantz, Taut, Huebener and
Schumann), the Mainz group (Wiehl, Mendel, Paulus, Strub and Eberhardt),
the Goeteborg/Oslo group (Omtvedt and Wierczinski) and Yakushev from
Dubna.
At the end of the workshop was a very interesting Round Table discussion
where the future of this field was discussed. It became obvious that the
field will not die out but instead, due to the fact that "long lived"
isotopes of the elements 107 and 108 can be expected, will expand. This
group expects very interesting new Physics and Chemistry on these
elements inthe near future.
For the organizers: G. Skarnemark and B. Fricke
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
================================================================================
--- P A P E R S F U N D E D B Y R E H E
>>> please send a preprint of papers funded by REHE to Bernd A. He\ss,
>>> Institut f\"ur Physikalische und Theoretische Chemie, Universit\"at Bonn,
>>> 53115 Bonn, Germany
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Gerhard Soff]
L. Labzowsky, I. Goidenko, M. Gorshtein, G. Soff, P. Pyykk\"o,
Hyperfine structure of the 2p$_{3/2}$ state of highly charged
$^{209}_{83}$Bi ions,
J. Phys. B30 (1997) 1427
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[communicated by Lucas Visscher]
The following paper will appear in Atomic Data and Nuclear Data Tables. An
html-version that contains more extensive tables of orbital energies and
the radial expectation values and for the first 109 elements with
different finite size nuclear models is available at
http://theochem.chem.rug.nl/~luuk/FiniteNuclei/
Dirac-Fock atomic electronic structure calculations using different
nuclear charge distributions.
L. Visscher, K. G. Dyall
ABSTRACT
Numerical Hartree-Fock calculations based on the Dirac-Coulomb Hamiltonian for
the first 109 elements of the periodic table are presented. The results
give the
total electronic energy as a function of the nuclear model that is used. The
main purpose of the calculations is to provide a set of benchmark results for
basis set calculations that use a finite size nuclear model.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
--- P O S I T I O N S available
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[no material for this section in the current newsletter]
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
================================================================================
--- P O S I T I O N S sought
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[no material for this section in the current newsletter]
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
================================================================================
--- ADDRESS LIST
The REHE address list comprises 193 scientists as of June 16, 1997; the
next address list will be provided with newsletter no. 28
This newsletter is mailed to all collegues presently in the REHE mailing
list.
If you don't find your name in the list below, please complete the form
and send it back per e-mail to hess@uni-bonn.de
>>> PLEASE include TEL, FAX, E-MAIL <<<
=================================================================
I am interested in receiving the REHE newsletter
NAME
-----------------------------------------------------------------
ADDRESS
-----------------------------------------------------------------
-----------------------------------------------------------------
TEL
-----------------------------------------------------------------
FAX
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-----------------------------------------------------------------
MAIN RESEARCH INTERESTS
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
BELARUS
--- Lavrenov Alexandre
BELGIUM
--- Michel Godefroid
CANADA
--- S.P. Goldman
--- Gulzari Malli
--- Georg Schreckenbach
--- Vedene H. Smith,Jr.
--- Jiahu WANG
DENMARK
--- Gustavo Adolfo Aucar
--- Jens Peder Dahl
--- Hans J\o rgen Aa. Jensen
--- Sheela Kirpekar
--- Jens Oddershede
--- Sten Rettrup
--- Stephan P.A. Sauer
ESTONIA
--- Uko Maran
FINLAND
--- Tapio T. Rantala
--- #e runeberg@csc.fi
--- Dage Sundholm
FRANCE
--- P. Braunstein
--- H. Chermette
--- Chantal Daniel
--- J. P. Desclaux
--- Jean-Pierre Dognon
--- Pascal H. Fries
--- Jean-Louis Heully
--- Paul INDELICATO
--- Elise Kochanski
--- Pascale MALDIVI
--- Michel Pelissier
--- Marie-Madeleine ROHMER
--- Christian Teichteil
GERMANY
--- Aleksey B. Alekseyev
--- Dirk Andrae
--- John BANHART
--- Robert J. Buenker
--- Zhengli Cai
--- Klaus Capelle
--- Michelle Carnell
--- Christian Chang
--- Geerd H. F. Diercksen
--- Klaus Dietz
--- Michael Dolg
--- Reiner Dreizler
--- Carsten Duesterhoeft
--- Hubert Ebert
--- Eberhard Engel
--- Roland Feder
--- Timo FLEIG
--- Gregor-Martin Fehrenbach
--- Robert Franke
--- Burkhard Fricke
--- Lothar Fritsche
--- Norbert Geipel
--- Walter Greiner
--- E.K.U. Gross
--- Christoph Heinemann
--- J\"urgen Hinze
--- Siegfried Huebener
--- Martin Kaupp
--- Stefan Keller
--- Dietmar Kolb
--- Karl Klinkhammer
--- J. Hrusak
--- J. V. Kratz
--- J. K\"ubler
--- W. Kutzelnigg
--- J. Ladik
--- Wenjian Liu
--- M. Mahnig
--- Christel M. Marian
--- Franz Mark
--- Christoph Maerker
--- Martin Moedl
--- Konstantin M. Neyman
--- Andreas Nicklass
--- Edgar Ottschofski
--- Valeria Pershina
--- S.D. Peyerimhoff
--- H. Pilkuhn
--- Bernd Reichert
--- Markus Reiher
--- Manuel Richter
--- Notker R\"osch
--- Matthias Schaedel
--- Werner Scheid
--- Paul von Ragu\'e Schleyer
--- Hubert Schmidbaur
--- W.H.Eugen Schwarz
--- Wolf-Dieter Sepp
--- Gerhard Soff
--- Michael Springborg
--- Hermann Stoll
--- Detlev Suelzle
--- Birgit Willerding
--- G\"unter Wunner
GREECE
--- P. Marketos
HUNGARY
--- Laszlo Nyulaszi
ISRAEL
--- Ephraim Eliav
--- Uzi Kaldor
ITALY
--- Maurizio Casarin
--- E. Clementi
--- Paolo Palmieri
--- Lorenzo Pisani
--- Angela Rosa
--- Mauro Stener
LITHUANIA
--- Bogdanivicius Pavlas
--- Zenonas Rudzikas
--- Dalia Satkovskiene
--- Juozas Sulskus
MALAYSIA
--- Mat Roni Abdul Rahman
Library
Universiti Sains Malaysia
Minden, 11800 Penang
Malaysia
NETHERLANDS
--- Simon Faas
--- Robert A. de Groot
--- Bert de Jong
--- Erik van Lenthe
--- Joop van Lenthe
--- Hirzo Merenga
--- Wim Nieuwpoort
--- Jaap G. Snijders
--- Lucas (Luuk) Visscher
NEW ZEALAND
--- Peter Schwerdtfeger
NORWAY
--- Odd Gropen
--- Jon K. Laerdahl
--- Aase Marit Leere Oeiestad
--- Inge Roeggen
--- Trond Saue
--- Ole Swang
OESTERREICH
--- Dieter Gruber
--- Robert Polly
POLAND
--- Maria Barysz
--- Jacek Bieron
--- Jacek Kobus
--- Zdzislaw LATAJKA
--- Andrzej Wojciech Rutkowski
--- Jacek Migdalek
--- Barbara Nissen-Sobocinska
--- Szczepan Roszak
--- J'ozef Eugeniusz Sienkiewicz
--- Maria Stanek
--- Radoslaw Szmytkowski
PORTUGAL
--- Jose Manuel Pires Marques
--- Fernando Costa Parente
--- Jose Paulo dos Santos
RUSSIA
--- Titov Anatoli
--- Alexander A. BAGATUR'YANTS
--- Vladimir Shabaev
--- V.L. Yakontov <\"m1s2s::yakhontov\"@cosmo.physi.uni-heidelberg.de>
SLOVAKIA
--- Stanislav Biskupic
--- Martina BITTEREROVA
--- Vladimir Kelloe
--- Vladimir G. Malkin
--- Miroslav Urban
SOUTH KOREA
--- Kyoung-Koo Baeck
--- Yoon Sup Lee
SPAIN
--- Inmaculada Martin
--- Luis Seijo
SWEDEN
--- Lars A. Bengtsson-Kloo
--- Stephan Fritzsche
--- Sven Larsson
--- Boris Minaev
--- Jeppe Olsen
--- Ann-Marie M\aa rtensson-Pendrill
--- Arne Ros\'en
--- Andrzej J. Sadlej
--- Per Svensson
--- Ulf Wahlgren
SWITZERLAND
--- Helmut Sigel
--- Walter Thiel
UNITED KINGDOM
--- Dr. S. Ait-Tahar
--- G. Y. Guo
--- Richard E. Moss
--- A. M. Simper
BNFL Company Research Laboratory
Springfield Works Salwick
Preston PR4 OXJ
--- Haakon Skaane
--- Harry Quiney
--- Stephen Wilson
USA
--- Kenneth George Dyall
--- Walter C. Ermler
--- Charlotte Froese Fischer
--- Yasuyuki Ishikawa
--- Svetlana Kotochigova
--- Jian LI
--- Ajaya K. Mohanty
--- Farid A. Parpia
--- Robert M. Shroll
STEERING COMMITTEE
--- E.J. Baerends
--- J.P. Daudey
--- Knut Faegri
--- Ian P. Grant
--- Bernd Artur He\ss
--- J. Karwowski
--- Pekka Pyykk\"o
--- Karlheinz Schwarz
--- A. Sgamelotti
--- Catherine Werner
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
End of REHE Newsletter No. 25