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Digitale Medien

Systematically too low values of the cranking model collective inertia parameters (1980)

Dudek, J. ; Dudek, W. ; Ruchowska, E. ; [weitere]

Springer

The European physical journal 294 (1980), S. 341-350

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ISSN: 1434-601X

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Deformed Nilsson and Woods-Saxon potentials were employed for generating single particle states used henceforth for calculating the inertia tensor (cranking model and monopole pairing) and the collective energy surfaces (Strutinsky method). The deformation was parametrized in terms of quadrupole and hexadecapole degrees of freedom. The classical energy expression obtained from the inertia tensor and energy surfaces was quantized and the resulting stationary Schrödinger equation was solved using the approximate method. The secondI π=0 2 + collective level energies were calculated for the Rare Earth and Actinide nuclei and the results compared with the experimental data. The vibrational level energies agree with the experimental ones much better for spherical nuclei for both single particle potentials; the discrepancies for deformed nuclei overestimate the experimental results by roughly a factor of two. It is argued that coupling of the axially symmetric quadrupole degrees of freedom to non-axial and hexadecapole ones does not affect the conclusions about systematically too low mass parameter values. The alternative explanation of the systematic deviations from the 0 2 + level energies could be a systematically too high stiffness of the energy surfaces obtained with the Strutinsky method.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01434142

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Digitale Medien

Effects of magnetic field exposure on fertilization success in rainbow trout, Salmo gairdneri (1983)

Strand, J. A. ; Abernethy, C. S. ; Skalski, J. R. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Bioelectromagnetics 4 (1983), S. 295-301

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Details

ISSN: 0197-8462

Schlagwort(e): fusion reactors ; magnetic fields ; biological effects ; fertilization ; fish ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Physik

Notizen: The sensitivity of trout ova and sperm to 1-T magnetic fields was investigated. It was determined that (1) overall test results combining seven independent Z-statistics demonstrated a significant (α 〈 0.0001) enhancement of fertilization when ova alone were exposed to the magnetic field prior to fertilization; (2) similarly, overall test results combining Z-statistics from eight independent experiments indicated a significant (α 〈 0.0004) enhancement when sperm alone were exposed; and (3) statistical analysis of nine independent experiments confirmed enhanced fertilization (α 〈 0.0001) when both ova and sperm were exposed to the magnetic field prior to fertilization. Although these data indicated that both ova and sperm were sensitive to magnetic fields, simultaneous exposure of both gametes did not have a greater total effect on fertilization rate than the sum of their individual effects.

Zusätzliches Material: 1 Ill.