In the Data Room of the Van-de-Graaff building of the South African National Accelerator Centre, in Faure, ZA.



Scientific staff: Univ.Prof. Dr. Manfred Drosg


Fast neutron research:

In a cooperation with Los Alamos National Laboratory, going back to the year 1969, neutron and gamma ray data both for basic physics and applied purposes are being measured and evaluated. The data reduction and evaluation is done at the institute.

More recently, in a cooperation with the University of Cape Town neutron experiments for applied purposes are made at the National Accelerator Centre of South Africa in Faure.



Highlights of recent years:

  1. Investigation of the possibility in using nuclear techniques for the identification and possibly the detection of hidden explosives.
  2. Application of nuclear techniques in planetary research (Mars)
  3. Further development of a package of computer codes (DROSG-2000) for the calculation of kinematic properties and predictions of neutron yields of accelerator-based monoenergetic neutron sources as a calculational backbone for the application of fast neutrons in medicine, humanitarian applications and technology.


a. International Co-operations


Nuclear Data Section

Pysics Section


Los Alamos National Laboratory

San Jose State University

NNDC of Brookhaven National Laboratory


Japanese Atomic Energy Research Institute, Tokai-mura


Centre d'Etudes de Bruyeres-le-Chatel


Max-Planck Institut für Chemie, Mainz

KfK, Karlsruhe

South Africa

University of Cape Town, Rondebosch

National Accelerator Centre, Faure

b. Internal Co-operations

Institut für Radiumforschung und Kernphysik, Wien



M. Drosg: "Use of back-scattered monoenergetic fast neutrons for humanitarian de-mining."

In cooperation with the University of Cape Town, South Africa, my ideas for verifying buried anti-personnel mines as described in two Austrian patent applications (see below) were verified experimentally. In order to speed-up the construction of such devices the foreign rights on this method was given to the international community by way of IAEA.

This figure shows the measured effect when a (dummy) mine was present under a sand cover of more than 10 cm. Using timed neutron sources the new method has the potential to recognize mines with an even three times thicker sand cover whereas other nuclear methods are presently limited to a few cm of sand cover. The full final report can be found under


M. Drosg: "DROSG-2000v2.0: Neutron Source Reactions. Data files with computer codes for 57 accelerator-based neutron source reactions", documented in the IAEA report IAEA-NDS-87 Rev. 6 (January 2001), IAEA.

The code can be downloaded from http://www-nds.iaea.org/drosg2000.html.

M. Drosg, D. M. Drake and R.C. Haight: "DOUBLE-DIFFERENTIAL GAMMA-RAY PRODUCTION CROSS SECTION SPECTRA OF Al, Fe AND Si FOR 8.51, 10.00, 12.24 AND 14.24 MeV NEUTRONS", LA-UR- Report, Los Alamos National Laboratory, USA (2001) Neutron induced gamma-ray production cross sections are needed for many applications, e.g. for controlled thermonuclear reactor design calculations, for nondestructive determination of the elemental composition of materials etc.. Especially data in the "gap" region between 8 and 14 MeV neutron energy are sparse. Gamma-ray production cross sections have been measured for neutron energies of 8.51, 10.00, 12.24 and 14.24 MeV at angles of 35, 55, 75 and 90 deg for gamma-ray energies up to 5 MeV.


M. Drosg: "Energieoptimierung bei der Durch- und Rückstrahlung schneller Neutronen von stark sauerstoffhaltigen Substanzen", Österreichische Patentanmeldung, 15. Juni 2000.

M. Drosg: "Lokalisation verborgener wasserstoffhaltiger Objekte mit Hilfe von Durchstrahlung und/oder Rückstreuung monoenergetischer schneller Neutronen", Österreichische Patentanmeldung, 15. Juni 2000.


"Accelerator based monoenergetic neutron production in the energy range from 0.0001 to 500 MeV". Colloquium at the National Accelerator Centre, Faure, ZA, 19. Juli 2001

"Nuclear physics experiments in support of NASA's Mars Observer mission". Meeting of the Physics Department of the University of Cape Town, Rondebosch, ZA, 18. Juli 2001

"Accelerators. A many-sided tool for the production of monoenergetic neutrons between 0.0001 and 500 MeV". Eingeladener Vortrag, 16th International Conference on the Application of Accelerators in Research and Industry, Nov. 1-4, 2000, Denton, Texas, USA. 3. Nov. 2000


Referent für Nucl.Sci.Eng.



EDV-Beauftragter der Fak. für NaWi & Math.

Fakultätsbeauftragter des Universitätenkuratoriums

Vize-Präses d. Diplomprüfungskommission Physik

Vorsitzender bei Rigorosen

Mitglied der Universitätsversammlung

Ersatzmitglied der Fakultät für NaWi & Math.




Koordinator der EDV-Lehre

© Manfred Drosg, Institut für Experimentalphysik der Universität Wien
Last update on Sept. 23, 2002 at 15:30 by MD