0000000000406733

AUTHOR

M. Mang

showing 3 related works from this author

Onset of nuclear vaporization inAu197+197Au collisions

1993

Multifragmentation has been measured for [sup 197]Au+[sup 197]Au collisions at [ital E]/[ital A]=100, 250, and 400 MeV. The mean fragment multiplicity increases monotonically with the charged particle multiplicity at [ital E]/[ital A]=100 MeV, but decreases for central collisions with incident energy, consistent with the onset of nuclear vaporization. Molecular dynamics calculations follow some trends but underpredict the observed fragment multiplicities. Including the statistical decay of excited residues improves the agreement for peripheral collisions but worsens it for central collisions.

PhysicsNuclear physicsNuclear reactionComputer Science::Information RetrievalExcited stateVaporizationGeneral Physics and AstronomyIncident energyMultiplicity (mathematics)Nuclear ExperimentCharged particlePhysical Review Letters
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Fragment Flow and the Multifragmentation Phase Space

1995

Fragment distributions have been measured for Au+Au collisions at [ital E]/[ital A]=100 and 1000 MeV. A high detection efficiency for fragments was obtained by combining the ALADIN spectrometer and the MSU-Miniball/WU-Miniwall array. At both energies the maximum multiplicity of intermediate mass fragments (IMF) normalized to the size of the decaying system is about one IMF per 30 nucleons but the element distributions show significant differences. Within a coalescence picture the suppression of heavy fragments in central collisions at [ital E]/[ital A]=100 MeV may be related to a reduction of the density in momentum space which is caused by the collective expansion.

Nuclear reactionCoalescence (physics)PhysicsSpectrometer[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex]Computer Science::Information RetrievalGeneral Physics and AstronomyPosition and momentum space[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Space (mathematics)Nuclear physicsPhase spaceMultiplicity (chemistry)Atomic physicsNuclear ExperimentNucleonPhysical Review Letters
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Determination of trace elements by resonant ionization mass spectrometry (RIMS)

1988

A resonant ionization mass spectrometer has been developed as an analytical tool for the detection of trace elements, especially of plutonium and other radionuclides. The sample, deposited on a rhenium filament, is evaporated by electrical heating and the atoms of the element under investigation are selectively ionized by laser light delivered from three dye lasers pumped by a copper vapour laser. The resulting photoions are detected in a time-of-flight spectrometer with a channelplate detector. For plutonium a mass resolution of M/δM=1500 was obtained and an overall detection efficiency of 4×10−6 was determined for stepwise excitation and ionization via autoionizing states. With a laser li…

Dye laserSpectrometerPhysics::Instrumentation and DetectorsChemistryClinical BiochemistryAnalytical chemistryGeneral MedicineThermal ionization mass spectrometryMass spectrometryBiochemistryAnalytical ChemistryIonizationGeneral Materials SciencePhysics::Atomic PhysicsAtomic vapor laser isotope separationHyperfine structureHybrid mass spectrometerFresenius Zeitschrift f�r Analytische Chemie
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