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FIFTH SYMPOSIUM ON NEUTRON DOSIMETRY. Proceedings Beam dosimetry Munich / Neuherberg 17-21 SEPTEMBER 1984 Volume II

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652 pages
COMMISSION OF THE EUROPEAN COMMUNITIES radiation protection Proceedings FIFTH SYMPOSIUM ON NEUTRON DOSIMETRY Beam dosimetry Munich / Neuherberg 17-21 SEPTEMBER 1984 EUR 9762 EN 1985 VOLUME II COMMISSION OF THE EUROPEAN COMMUNITIES radiation protection Proceedings FIFTH SYMPOSIUM ON NEUTRON DOSIMETRY Beam dosimetry Munich / Neuherberg 17-21 SEPTEMBER 1984 edited by H. Schraube, G. Burger Institut für Strahlenschutz Gesellschaft für Strahlen- und Umweltforschung mbH Neuherberg/München, Federal Republic of Germany and J. Booz CEC, Directorate-General for Science, Research and Development Radiation protection programme EUR 9762 EN 1985 VOLUME II Published by the COMMISSION OF THE EUROPEAN COMMUNITIES Directorate-General Information Market and Innovation Bâtiment Jean Monnet LUXEMBOURG LEGAL NOTICE Neither the Commission of the European Communities nor any person acting on behalf of then is responsible for the use which might be made of the following information ISBN 92-825-5617-4 (Volume I) ISBN 92-825-5619-0 (Volumes I and li) Cataloguing data can be found at the end of this publication Luxembourg, Office for Official Publications of the European Communities, 1985 Volume II: ISBN 92-825-5618-2 Catalogue number:} © ECSC-EEC-EAEC, Brussels · Luxembourg, 1985 Printed in Luxembourg .«**^!
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COMMISSION OF THE EUROPEAN COMMUNITIES
radiation protection
Proceedings
FIFTH SYMPOSIUM
ON NEUTRON DOSIMETRY
Beam dosimetry
Munich / Neuherberg
17-21 SEPTEMBER 1984
EUR 9762 EN
1985 VOLUME II COMMISSION OF THE EUROPEAN COMMUNITIES
radiation protection
Proceedings
FIFTH SYMPOSIUM
ON NEUTRON DOSIMETRY
Beam dosimetry
Munich / Neuherberg
17-21 SEPTEMBER 1984
edited by
H. Schraube, G. Burger
Institut für Strahlenschutz
Gesellschaft für Strahlen- und Umweltforschung mbH
Neuherberg/München, Federal Republic of Germany
and
J. Booz
CEC, Directorate-General for Science, Research and Development
Radiation protection programme
EUR 9762 EN
1985 VOLUME II Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General Information Market and Innovation
Bâtiment Jean Monnet
LUXEMBOURG
LEGAL NOTICE
Neither the Commission of the European Communities nor any person acting
on behalf of then is responsible for the use which might be made
of the following information
ISBN 92-825-5617-4 (Volume I)
ISBN 92-825-5619-0 (Volumes I and li)
Cataloguing data can be found at the end of this publication
Luxembourg, Office for Official Publications of the European Communities, 1985
Volume II: ISBN 92-825-5618-2 Catalogue number:}
© ECSC-EEC-EAEC, Brussels · Luxembourg, 1985
Printed in Luxembourg .«**^!*>
1984
VOLUME II
Beam dosimetry This symposium was jointly organized by the
Commission of the European Communities
Directorate-General for Science, Research and Development
Radiation Protection Programme
Brussels, Belgium
and the
Gesellschaft für Strahlen- und Umweltforschung mbH München
Institut für Strahlenschutz
Neuherberg, Federal Republic of Germany
cosponsored by the
US-Department of Energy
Office of Health and Environmental Research
Washington, D.C , USA
and the
European Clinical Neutron Dosimetry Group ECNEU
PROGRAMME COMMITTEE
D.K. Bewley, London W. Jacobi, Neuherberg
J.J. Broerse, Rijswijk W.M. Lowder, Washington
R.S. Caswell, Washington G. Portal, Fontenay-aux-Roses
M. Coppola, Rome H. Seguin, Luxembourg
J.A.B. Gibson, Harwell A. Wambersie, Bruxelles
SCIENTIFIC SECRETARIES
G. Burger, Neuherberg J. Booz, Bruxelles
LOCAL ORGANISATION
Conference Service of the GSF
- IV -EDITORIAL
These are the proceedings of the Fifth Symposium on Neutron
Dosimetry, held at the Gesellschaft für Strahlen- und Umweltforschung mbH
(GSF) at Munich-Neuherberg on 19-21 September, 1984. The Symposium was
jointly organized by the Commission of the European Communities,
Directorate-General for Science, Research and Development, and the
Institute for Radiation Protection at GSF, cosponsored by the US
Department of Energy, Office of Health and Environmental Research. The
sessions on new results in clinical neutron dosimetry were also
cosponsored by ECNEU, the physicists' organization within the EORTC High
LET Therapy Group.
110 contributions, presented during the Symposium in 14 plenary and 6
poster sessions, are contained in these two volumes. The proceedings do
not, however, just follow the chronological order of the scientific
programme; all contributions are rearranged and grouped into 19 topics
fitting into two volumes, Volume I - Radiation Protection Aspects and
Volume II - Beam Dosimetry.
In the field of radiation protection dosimetry the discussion on
improved concepts has not waned. On the contrary it has received new
impetus by the work of several ICRU and ICRP committees. New quantities
have been introduced and their pros and cons have been thoroughly
discussed. The old question of whether the quality factor for neutrons is
appropriate or whether it should be increased has again been investigated
in the light of radiobiological findings and biophysical models. New
developments in practical monitoring are reported. This concerns both new
individual dosemeters and new area monitoring devices. Two items receive
particular emphasis: the most widely used track etch material CR-39 and
its properties and the application of low pressure tissue equivalent
proportional counters in radiation protection.
In the volume on beam dosimetry not only new results in applying
gaseous detectors but also the use of passive thermoluminescence
detectors are reported. Finally, the main ECNEU-sponsored fields of
measurement of beam-characteristics, presentation of status reports on
V -therapy installations and discussion of progress in physical treatment
planning are extensively covered. Beam applications, even when aimed to
radiotherapy, generally include radiobiological research, which does not
only help to optimize treatment strategies but also to improve our
insight into cellular and tissue reactions, relevant for radiation
protection.
To guarantee the scientific quality of the publication, each paper
was reviewed by one or more referees and, where necessary, revised by the
authors. We would like to express our thanks for the help in editing the
proceedings. We also wish to acknowledge the heavy burden accepted by the
members of the programme committee. An especially important task was
taken over by the rapporteurs of the poster sessions; we thank all of
them. In particular, we would like to express our gratitude to Dr.
Lowder from the US Department of Energy and Dr. Mijnheer, the chairman
of ECNEU, for their collaboration and their contributions in the
preparation of the symposium programme.
Finally the technical organization of the symposium was excellently
managed by the conference service of the GSF and members of the Institute
of Radiation Protection. The help of Mrs. Lapointe deserves special
recognition.
Hans Schraube Georg Burger Jochen Booz
VI PREFACE
This was the fifth occasion on which the Symposium on Neutron
Dosimetry was held at the GSF-campus in Munich-Neuherberg. As a meeting
jointly organized by the GSF and the Commission of the European
Communities and cosponsored this time also by the US-Department of Energy
it clearly demonstrated not only the need but also the willingness for
international collaboration in this important field of health physics.
The GSF, which is a major research institution in Germany and for
which the main interest is the analysis of anthropogenic risks to human
health, feels greatly honoured to welcome at regular intervals so many
outstanding scientists from more than 10 countries who work in the field
of neutron dosimetry.
Obviously a topic of continuous and great interest is the risk from
neutron exposure. The question is linked with the problem of
carcinogenesis of high LET-radiation. I understand that this is still an
open question, especially since epidemiologic data from the A-bomb
survivors in connection with revised dosimetry, does not seem to be able
to give satisfactory answers. This underlines the importance of animal
studies, a matter of great public concern which we have to face-up to in
radiobiology.
I realize that this scientific field brought together radiobiologists
and radiotherapists who are interested in the possible advantages of high
LET-therapy, physicists working in theoretical and experimental
dosimetry, mathematicians engaged in all kinds of radiation transport
calculations and last but not least the health physicists, who implement
the new principles, methods and instrumental developments into their
daily routine.
I am sure that it was a successful meeting, and I hope that there
were - and will be again - also some occasions to visit and see some of
the beautiful landscape of Bavaria as well as experiencing the culture
and enviable flair of its capital, Munich.
Prof. Dr. H.-W. Levi
Scientific-Technical Director
VII -

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