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| These recent or significant publications and presentations are arranged in reverse chronological order. Older publications are removed when they become easily available in printed form; however, some significant works are kept for convenient online access through the Internet. |
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The performance of six popular Monte Carlo and Sn transport codes is compared for a simple spherical model of the Bigten critical assembly. These tests stress the importance of the unresolved resonance region of U-238. Agreement is generally good, but several interesting differences and data effects are observed. LA-UR-08-4668 (July 16, 2008). |
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This study addresses, for the first time, the total prompt energy release and its components for the fission of U-235, U-238, and Pu-239 as a function of the kinetic energy of the neutron inducing the fission. The components are extracted from experimental measurements, where they exist, together with model-dependent calculation, interpolation, and extrapolation. While the components display clear dependencies upon the incident neutron energy, their sums display only weak, yet definite, energy dependencies. Also addressed is the total prompt energy deposition in fission for the same three systems. Results are presented in equation form. New measurements are recommended as a consequence of this study. Reprints: D.G.Madland, Nuclear Physics A 772 (2006) 113-137, while available, from dgm@lanl.gov. Los Alamos National Laboratory report LA-UR-05-2258. |
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The article "Nuclear fission modes and fragment mass asymmetries in a
five-dimensional deformations space" by P. Möller, D. G. Madland,
A. J. Sierk, and A. Iwamoto, appeared in Nature, Vol 409, 15 February 2001,
p 485-490. It has been assigned Los Alamos National Laboratory Preprint
No LA-UR-00-2893.
The article itself can be obtained from Nature's web site . We provide here postscript files of the seven figures that appear in the article in the form of a gzipped tar file figs-nature.tar.gz . The figures are in the form originally submitted to Nature; the published versions differ slightly from the files provided here. When printed the files we provide here will be the size of a full page. It should be observed that to unzip and unpack this file about 125 Mb of file space is needed, since some of the individual figure files are up to 23 Mb in size. The three first figures are black-and-white, the remaining five figures color. However, for those who desire bw versions it is trivial to convert the color figures to bw. In the very beginning of each file there is a line " 1 /icol exch def". If this is changed to " 0 /icol exch def" the figure will be optimized for printing on a black-and-white printer. Although the color figures will print as are on a black-and-white printer the result will be very poor unless this change is instituted. It is of course necessary that the editor and computer system can handle 23 Mb file sizes.
A limited number of reprints are available while supplies last from
moller@moller.lanl.gov. Those residing in Japan should send their
requests to iwamoto@hadron01.tokai.jaeri.go.jp. |
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The paper "Status of Delayed-Neutron Precursor Data: Half-Lives and
Neutron-Emission Probabilities" by Bernd Pfeiffer, Karl-Ludwig Kratz, and
Peter Möller has been assigned Los Alamos National Laboratory Preprint
No LA-UR-00-5897, and been submitted to Progress in Nuclear Energy.
A gzipped postscript file of the manuscript and table may be downloaded by clicking here. moller@lanl.gov. |
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The paper "Five-Dimensional Fission Potential-Energy Surfaces and Coexisting
Fission Modes in the Heavy-Element Region" by Peter Möller, David G.
Madland, Arnold J. Sierk, and A. Iwamoto, was presented at the Tours 2000,
Tours Symposium on Nuclear Physics IV, Tours, France, September 4-7, 2000.
It has been assigned Los Alamos National Laboratory Preprint No LA-UR-00-4038,
and will appear in an AIP conference proceedings.
Figures 2,3,4,5,6 and 8 are in color, so the paper should be printed on a color printer. Figures 4,5, and 6 are quite large, up to 23 Mb, and they occur on pages 8, 9, and 10 respectively. On some printers these pages may take a considerable time to print. The unzipped file is about 45 Mb. moller@lanl.gov. |
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The paper: "Complete, Multi-Million-Grid-Point Five-Dimensional Deformation
Spaces" by P. Möller, A. Iwamoto, and D. G. Madland was presented at
the Specialists' Meeting on Interdisciplinary Approach to Nuclear Fission,
2000, January 18-19, 2000, Kyoto University Research Reactor Institute, Japan,
It has been assigned Los Alamos National Laboratory Preprint No LA-UR-00-1435,
and will appear in a Kyoto University Research Reactor Institute Report.
Both a
black-and-white
and a
color
version are available.
The unzipped manuscript file is about 45 Mb. Because of very large figure file sizes, up to 23 Mb, pages 18, 19, and 22 may take considerable time to print on some printers. moller@lanl.gov. |
| The paper "LA150 Documentation of Cross Sections, Heating, and Damage," by M.B.Chadwick, P.G.Young, R.E.MacFarlane, P.Moller, G.M.Hale, R.C.Little, A.J.Koning, and S.Chiba, Los Alamos National Laboratory report LA-UR-99-1222 (1999), describes the evaluations from the new library of cross sections for incident neutrons and protons to 150 MeV that has been produced to support the Accelerator Production of Tritium (APT) project. ryxm@lanl.gov. |
| The use of radionuclides in medical and industrial applications is steadily increasing, but the capacity to produce these materials in the US is insufficient. One good possibility for future production of radionuclides is the use of high-power accelerators, such as the one studied for the Accelerator Production of Tritium (APT) project. This paper by K. A. Van Riper, S. G. Mashnik, and W. B. Wilson, "Study of Isotope Production in High Power Accelerators," reports on calculations of production rates of 22 useful radionuclides at various locations in the APT target-blanket region and at various accelerator beam energies. There are numerous gif and Postscript figures. Look at either the main report or the table of contents. LA-UR-98-5379. wbw@lanl.gov. |
| This section contains the preprint ``Pseudo-spin Symmetry and Relativistic Single-nucleon Wave Functions,'' by Joseph N. Ginocchio and David G. Madland, which has been submitted for publication in Physical Review C. This document, Los Alamos National Laboratory Preprint LA-UR-97-3921, contains 15 pages including 3 tables (normal PostScript file, 172.064 KB) and 9 PostScript figures [ Figure 1 (57 KB), Figure 2 (58 KB), Figure 3 (57 KB), Figure 4 (58 KB), Figure 5 (57 KB), Figure 6 (58 KB), Figure 7 (58 KB), Figure 8 (255 KB), and Figure 9 (12 KB)]. dgm@lanl.gov |
| This section contains the report ``Cascade-Exciton Model Analysis of Nucleon-Induced Fission Cross Sections of Lead and Bismuth at Energies from 45 to 500 MeV," by A. V. Prokofiev, S. G. Mashnik, and A. J. Sierk. The report is 38 pages long and contains 16 figures. It has been assigned the Los Alamos National Laboratory Report No. LA-UR-98-0418, and has been submitted to Nuclear Science and Engineering. Those who have access to the decompression program gunzip should select the compressed file (1.24 MB). For the benefit of those without access to gunzip, we have also provided this normal file (4.99 MB), which will require a longer time to transmit. ajs@t2.lanl.gov. |
| The APT target/blanket assembly provides a radiation environment of neutrons and protons of all energies below that of the incident proton beam. The parasitic application of this environment in the production of radioisotopes of medical and industrial applications has been proposed and candidate radioisotopes listed. In the present work we have simulated the neutron and proton flux spectra at two possible blanket irradiation sites, selected two candidate medical radioisotopes for study, modeled cross sections for target materials leading to their production, and calculated their production rates during APT operation using the fluxes and cross sections obtained. This study illustrates a procedure for isotope production calculations and compares results of cross-section modeling codes available for use in APT simulations. Postscript file for LA-UR-97-5068 (5.6 MB). wbw@lanl.gov. |
| This section contains the preprint ``Masses and Deformations of Neutron-Rich Nuclei,'' by J. Rayford Nix and Peter Möller, which was presented at the International Conference on Fission and Properties of Neutron-Rich Nuclei, Sanibel Island, Florida, November 10-15, 1997. It is 10 pages long and contains seven figures, one of which is in color. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-97-4220 and will appear in the proceedings of the conference, to be published by World Scientific, Singapore. Those who have access to the decompression program gunzip should select this compressed PostScript file (1.61 MB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (8.42 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the preprint ``Stability and Production of Superheavy Nuclei,'' by Peter Möller and J. Rayford Nix, which was presented at the Tours Symposium on Nuclear Physics III, Tours, France, September 2-5, 1997. It is 10 pages long and contains 10 figures, some of which require a long time to print. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-97-3580 and will appear in the proceedings of the symposium, to be published by the American Institute of Physics. Those who have access to the decompression program gunzip should select this compressed PostScript file (2.03 MB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (10.26 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the preprint ``Single-Particle Enhancement of Heavy-Element Production,'' by P. Möller, J. R. Nix, P. Armbruster, S. Hofmann, and G. Münzenberg, which has now been accepted for publication by Zeitschrift für Physik A. It is seven pages long and contains five figures. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-97-1247. Those who have access to the decompression program gunzip should select these compressed files. For the benefit of those without access to gunzip, we have also provided these normal files, which are several times the length of the above compressed versions and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the report ``Cascade-Exciton Model Detailed Analysis of Proton Spallation at Energies from 10 MeV to 5 GeV," by S. G. Mashnik, A. J. Sierk, O. Bersillon, and T. Gabriel. The report is iv + 177 pages long and contains 103 figures. It has been assigned the Los Alamos National Laboratory Report No. LA-UR-97-2905. Those who have access to the decompression program gunzip should select the compressed file. For the benefit of those without access to gunzip, we have also provided the normal file, which has a length of 30.37 MB, and will consequently require an extremely long time to transmit. ajs@t2.lanl.gov. |
| This section contains preprints of the T-2 papers presented at the International Conference on Nuclear Data for Science and Technology, May 19-24, 1997, Trieste, Italy. We feature descriptions of our work on 150-MeV cross sections, medical radiography, global intermediate-energy optical models, astrophysics cross sections, and radioactivity calculations. ryxm@lanl.gov. |
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This section contains the manuscript ``Nuclear Properties for
Astrophysical and Radioactive-Ion-Beam Applications,'' by P.
Möller, J. R. Nix, and K.-L. Kratz, which is now published in
Atomic Data Nucl. Data Tables 66 (1997), 131-343. It
consists of a text section, 16 color figures, 21 black-and-white
figures, 56 black-and-white graphs of single-particle level
diagrams, and a table of ground-state properties for 8979 nuclei
ranging from oxygen-16 to Z = 136, A = 339 calculated on the basis
of the finite-range droplet model and folded-Yukawa
single-particle potential. The tabulated quantities include the
ground-state odd-proton and odd-neutron spins and parities, proton
and neutron pairing gaps, binding energy, one- and two-neutron
separation energies, quantities related to beta-delayed one- and
two-neutron emission probabilities, beta-decay energy release and
half-life with respect to Gamow-Teller decay, one- and two-proton
separation energies, and alpha-decay energy release and
half-life. It has been assigned the Los Alamos National
Laboratory Preprint No. LA-UR-94-3898. Those who have access to
the decompression program gunzip should select these compressed files. For the
benefit of those without access to gunzip, we have also provided
these normal files, which are
several times the length of the above compressed versions and will
consequently require several times as long to transmit.
To obtain the mass, deformation, or additional nuclear property for an individual nucleus, you may utilize this interactive interface, where computer-readable files are also given for the additional nuclear properties. The computer-readable file of masses and deformations is included with our orignal manuscript ``Nuclear Ground-State Masses and Deformations'' in both compressed format and normal format. moller@t2.lanl.gov. |
| This section contains the preprint ``Specialists' Meeting on the Nucleon-Nucleus Optical Model up to 200 MeV : Conclusions and Recommendations,'' by David G. Madland, which was presented at the closing of the Specialists' Meeting on the Nucleon Optical Model up to 200 MeV, Commissariat à l'Energie Atomique, Bruyères-le-Châtel, France, November 13-15, 1996. There are five pages of text in the normal PostScript file (70 KB). This document, Los Alamos National Laboratory Preprint LA-UR-96-4759, will appear in the proceedings of the meeting, to be published by the OECD Nuclear Energy Agency, Paris. |
| This section contains the preprint ``Progress in the Development of Global Medium-Energy Nucleon-Nucleus Optical Model Potentials,'' by David G. Madland, which was presented at the Specialists' Meeting on the Nucleon Optical Model up to 200 MeV, Commissariat à l'Energie Atomique, Bruyères-le-Châtel, France, November 13-15, 1996. There are ten pages of text including two tables (normal PostScript file, 0.5 MB) and ten figures available from the author (dgm@lanl.gov). This document, Los Alamos National Laboratory Preprint LA-UR-97-0306, will appear in the proceedings of the meeting, to be published by the OECD Nuclear Energy Agency, Paris. |
| This talk was presented at the European NJOY Users' Group Meeting in Paris in December of 1996. It is available in Postscript and html. The figures are in Postscript: Figure 1 (42KB), Figure 2 (58KB), Figure 3 (35KB), Figure 4 (69KB), Figure 5 (27KB), Figure 6, and Figure 7. LA-UR-96-4688. ryxm@lanl.gov |
| This section contains the preprint ``From Nuclear Astrophysics to Superheavy Elements: Predictions for Nuclei Beyond Our Shores,'' by J. Rayford Nix and Peter Möller, which is now published in Physics of Unstable Nuclear Beams, Proc. First Int. Workshop on Physics of Unstable Nuclear Beams, Serra Negra, São Paulo, Brazil, 1996 (World Scientific, Singapore, 1997), 299-306. It is eight pages long and contains four figures, one of which is in color. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-96-2625. Those who have access to the decompression program gunzip should select this compressed PostScript file (834 KB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (4.48 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This is a long version of the paper G. M. Hale, "Extrapolation of alpha+Carbon Reaction Cross Section to Astrophysical Energies," presented at the Fourth International Symposium on Nuclear Astrophysics, "Nuclei in the Cosmos 1996," at the University of Notre Dame, 20-27 June 1996. Postscript file (1.0 MB). |
| The role of QCD scales and chiral symmetry in finite nuclei is examined in J. L. Friar, D. G. Madland, and B. W. Lynn, "QCD Scales in Finite Nuclei," accepted for Publication in Phys. Rev. C for June 1996. LA-UR-95-4050. Postscript file (0.33 MB). |
| This section contains the preprint "Study of Nucleon-Induced Preequilibrium Reactions in terms of Quantum Molecular Dynamics", by S. Chiba, M.B. Chadwick, K. Niita, T. Maruyama, T. Maruyama, and A. Iwamota. It consists of 16 pages of Postscript text and 10 Postscript figures. This paper has been accepted for publication by Physical Review C. mbchadwick@lanl.gov, Feb. 1996. |
| This section contains the preprint "Calculation and Evaluation of Cross Sections and Kerma Factors for Neutrons Up To 100 MeV on Carbon", by M. B. Chadwick, L. Cox, P. G. Young, and A. Meigooni, which has been accepted for publication in Nuclear Science and Engineering. It consists of 28 pages of Postscript text, along with 19 Postscript figures, and has been assigned a Lawrence Livermore National Laboratory report number UCRL-JC-121303 (1995). This work was performed while M. B. Chadwick was at Livermore, in collaboration with P. G. Young at Los Alamos. |
| This section contains the preprint "Calculation and Evaluation of Cross Sections and Kerma Factors for Neutrons up to 100 MeV on 16O & 14N", by M. B. Chadwick and P. G. Young, which has been accepted for publication in Nuclear Science and Engineering. It consists of 20 pages of text in Postscript, along with 20 Postscript figures, and has been assigned a Lawrence Livermore National Laboratory report number UCRL-JC-1224352435(1995). This work was performed while M. B. Chadwick was at Livermore, in collaboration with P. G. Young at Los Alamos. |
| This section contains a preprint "Quantum Molecular Dynamics and Multistep-Direct Analyses of Multiple Preequilibrium Emission", by M. B. Chadwick, S. Chiba, K. Niita, T. Muruyama, and A. Iwamoto. It is published in the November 1995 issue of Physical Review C (Phys. Rev. C 52, 2800 (1995)). It consists of 7 pages of text (in Postscript), along with 3 Postscript figures. |
| This section contains the manuscript ``Collisions of Deformed Nuclei: A Path to the Far Side of the Superheavy Island,'' by Akira Iwamoto, Peter Möller, J. Rayford Nix, and Hiroyuki Sagawa, which is now published in Nucl. Phys. A596 (1996), 329-354. It consists of a 15-page text section, 10 three-dimensional figures illustrating the fusion configurations considered, and 15 remaining figures. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-95-2443. Those who have access to the decompression program gunzip should select these compressed files. For the benefit of those without access to gunzip, we have also provided these normal files, which are several times the length of the above compressed versions and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the manuscript ``Macroscopic-Microscopic Mass Models,'' by J. Rayford Nix and Peter Möller, which is now published in Proc. Int. Conf. on Exotic Nuclei and Atomic Masses (ENAM 95), Arles, France, 1995 (Les Editions Frontières, Gif sur Yvette, 1995), 23-32. It is 10 pages long and contains seven figures, one of which is in color. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-95-2073. Those who have access to the decompression program gunzip should select this compressed PostScript file (452 KB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (2.24 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the manuscript ``Collisions of Deformed Nuclei and Superheavy-Element Production,'' by Akira Iwamoto, Peter Möller, J. Rayford Nix, and Hiroyuki Sagawa, which is now published in Perspectives in Heavy Ion Physics, Proc. 2nd Japan-Italy Joint Symp., Wako-shi, Saitama, Japan, 1995 (World Scientific, Singapore, 1996), 88-102. It is 15 pages long and contains seven figures. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-95-2932. Those who have access to the decompression program gunzip should select this compressed PostScript file (278 KB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (1.24 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
| This section contains the preprint ``Fission Properties of the Heaviest Elements,'' by Peter Möller and J. Rayford Nix, which was presented at the Dai 2 Kai Hadoron Tataikei no Simulation Symposium, Tokai-mura, Ibaraki, Japan, November 30-December 2, 1994. It is 12 pages long and contains seven figures. It has been assigned the Los Alamos National Laboratory Preprint No. LA-UR-95-697 and should appear in the proceedings of the symposium, which should be issued as a Japan Atomic Energy Research Institute report. Those who have access to the decompression program gunzip should select this compressed PostScript file (284 KB). For the benefit of those without access to gunzip, we have also provided this normal PostScript file (1.23 MB), which is several times the length of the above compressed version and will consequently require several times as long to transmit. moller@t2.lanl.gov. |
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This section contains the manuscript ``Nuclear Ground-State Masses and
Deformations,'' by P. Möller, J. R. Nix, W. D. Myers, and W. J.
Swiatecki, which is now published in Atomic Data Nucl. Data Tables
59 (1995), 185-381. It consists of a text section, eight
black-and-white figures, 12 color figures, and a table of ground-state
masses and deformations for 8979 nuclei ranging from oxygen-16 to Z =
136, A = 339 calculated on the basis of the finite-range droplet model
and folded-Yukawa single-particle potential. It has been assigned the
Los Alamos National Laboratory Preprint No. LA-UR-93-3083. Those who
have access to the decompression program gunzip should select these compressed files. For the benefit of
those without access to gunzip, we have also provided these normal files, which are several times the
length of the above compressed versions and will consequently require
several times as long to transmit.
To obtain the mass, deformation, or additional nuclear property for an individual nucleus, you may utilize this interactive interface, where computer-readable files are also given for the additional nuclear properties. The computer-readable file of masses and deformations is included with the other files in this present section. moller@t2.lanl.gov. |
This section contains the paper T. R. England and B. F. Rider,
"Evaluation and Compilation of Fission Product Yields," Los Alamos
National Laboratory report LA-UR-94-3106 (Oct. 1994). Because this
paper contains about 80,000 lines of text, we are experimenting with
electronic publication. The General
Discussion and Bibliography are given as a Postscript file
(1.75 MB). The recommended yields, original data, and reference
sources are presented in a series of appendices in the form of
ordinary computer text files:
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| This is a paper prepared for the International Conference on Nuclear Data for Science and Technology, 9-13 May, Gatlinburg, Tennessee: R. E. MacFarlane, "Data Testing of ENDF/B-VI," Los Alamos National Laboratory preprint LA-UR-94-1541. There are Postscript files for the formal paper (43 KB), the abstract (70 KB), and the poster (144 KB). ryxm@lanl.gov. |
| This is a paper prepared for the International Conference on Nuclear Data for Science and Technology, 9-13 May, Gatlinburg, Tennessee: R. E. MacFarlane, "Energy Balance Of ENDF/B-VI," Los Alamos National Laboratory preprint LA-UR-94-1542. There are Postscript files for the formal paper (95 KB), the abstract (67 KB), and the viewgraphs (156 KB). ryxm@lanl.gov. |
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This is a paper prepared for the ANS 1994 Topical on Advances in
Reactor Physics, 11-15 April, Knoxville, Tennessee: R. E. MacFarlane,
"Processing and Testing ENDF/B-VI with NJOY and TRANSX," Los Alamos
National Laboratory report LA-UR-94-1284 (April 1994). There are three
Postscript files available: the formal
report (380 KB), the abstract (78
KB), and the viewgraphs (430 KB).
ryxm@lanl.gov
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| Select here to view or download a Postscript file (3.09 MB) for the report R. E. MacFarlane, "New Thermal Neutron Scattering Files for ENDF/B-VI Release 2," Los Alamos National Laboratory report LA-12639-MS (ENDF 356) (March 1994). This report gives details on the new LEAPR module for NJOY, and it describes how LEAPR was used to prepare new thermal scattering law files in ENDF-6 format. Actually, these new evaluations were included in Release 3 of ENDF/B-VI, not Release 2. The data files can be viewed elsewhere. ryxm@lanl.gov. |
| TRANSX is a code for preparing data tables for nuclear transport codes from nuclear data in MATXS format. A Postscript version (0.55 MB) of the report R. E. MacFarlane, "TRANSX 2: A Code for Interfacting MATXS Cross-Section Libraries to Nuclear Transport Codes," Los Alamos National Laboratory report LA-12312-MS (July 1992), is available for viewing or downloading. Information on the current version of the code will be found in the Codes section of the T-2 Nuclear Information Service. A hypertext verion of the TRANSX report is also available. ryxm@lanl.gov. |
| Our group uses LaTeX for most of our technical publications. Therefore, we were interested in moving to the new LaTeX2e when it became available. We are now using the teTeX implementation. When we started using the new LaTeX2e system, we had to write new "class" packages for our letters and memos. The work that we did might be a good staring point for others. Check out the t2memo.cls and t2letter.cls files. There are also sample TeX files for both classes, and they are suitable for use as templates. See t2memo.tex and t2letter.tex. ryxm@lanl.gov. |
