7 Matching Results

Search Results

Results: 1 - 7
open access

SOUDAN 2 nuclear decay experiment. Progress report

Description: Construction of the experiment cavern on the 27th level of the SOUDAN iron mine in northern Minnesota began early this year and will be complete early in 1985. The first 1200 tons of the detector itself is also under construction in the US and UK; installation will begin in mid 1985. Physics exploitation will begin early in 1986 and the first 1200 ton module will be complete early in 1987. The detector may be expanded to between 3 and 5 such modules in the cavern. The detector is an iron tracki… more
Date: June 29, 1984
Creator: Minnesota; Argonne; Oxford; Rutherford & Collaboration, Tufts
Partner: UNT Libraries Government Documents Department
open access

Nova laser alignment control system

Description: Alignment of the Nova laser requires control of hundreds of optical components in the ten beam paths. Extensive application of computer technology makes daily alignment practical. The control system is designed in a manner which provides both centralized and local manual operator controls integrated with automatic closed loop alignment. Menudriven operator consoles using high resolution color graphics displays overlaid with transport touch panels allow laser personnel to interact efficiently wi… more
Date: March 29, 1984
Creator: Van Arsdall, P.J.; Holloway, F.W.; McGuigan, D.L. & Shelton, R.T.
Partner: UNT Libraries Government Documents Department
open access

Prospects for cellular mutational assays in human populations

Description: Practical, sensitive, and effective human cellular assays for detecting somatic and germinal mutations would have great value in environmental mutagenesis and carcinogenesis studies. Such assays would fill the void between human mutagenicity and the data that exist from short-term tests and from mutagenicity in other species. This paper discusses the following possible human cellular assays: (1) HPRT (hypoxanthine phosphoribosyltransferase) somatic cell mutation based on 6-thioguanine resistanc… more
Date: June 29, 1984
Creator: Mendelsohn, M.L.
Partner: UNT Libraries Government Documents Department
open access

Absolute dipole gamma-ray strength functions for /sup 176/Lu

Description: We have derived absolute dipole strength-function information for /sup 176/Lu from an average resonance capture study of /sup 175/Lu with 2-keV neutrons, and from neutron capture cross-section measurements with neutrons from 30 keV to about 1 MeV. We found that we needed to increase our previous estimate of the relative M1/E1 strengths near 5 MeV by a factor of 3, and to revise downward the absolute magnitude of our E1 strength function. We accomplished the latter, while still maintaining conti… more
Date: August 29, 1984
Creator: Gardner, D. G.; Gardner, M. A. & Hoff, R. W.
Partner: UNT Libraries Government Documents Department
open access

Isomer ratio calculations using modeled discrete levels

Description: We have calculated isomer ratios for the /sup 175/Lu(n,..gamma..), /sup 175/Lu(n,2n), /sup 237/Np(n,2n), /sup 241/Am(n,..gamma..), and /sup 243/Am(n,..gamma..) reactions using modeled level structures in the deformed, odd-odd product nuclei. We find: that the hundreds of discrete levels and their gamma-ray branching ratios provided by the modeling are necessary to achieve agreement with experiment, that many rotational bands must be included in order to obtain a sufficiently representative sele… more
Date: August 29, 1984
Creator: Gardner, M. A.; Gardner, D. G. & Hoff, R. W.
Partner: UNT Libraries Government Documents Department
open access

The Origin of Apollo Objects

Description: The source of the Earth-orbit-crossing asteroids has been much debated. (This class of asteroidal bodies includes the Apollo, Aten, and some Amor objects, each with its own orbital characteristics; we shall use the term Apollo objects to mean all Earth-crossers.) It is difficult to find a mechanism which would create new Apollo objects at a sufficient rate to balance the loss due to collision with planets and ejection from the solar system, and thus explain the estimated steady-state number. A … more
Date: March 29, 1984
Creator: Perlmutter, Saul
Partner: UNT Libraries Government Documents Department
open access

Diagnostics of a high current capillary discharge

Description: We have demonstrated that thin (10 to 25 ..mu..m diameter) capillaries can be fabricated in suitably configured insulators for use in pulse power machines. Large currents can be used to heat these capillaries which produce photons with an energies greater than 1 keV.
Date: March 29, 1984
Creator: Kania, D. R. & Jones, L. A.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen