47 research outputs found
Isospin influences on particle emission and critical phenomenon in nuclear dissociation
Features of particle emission and critical point behavior are investigated as
functions of the isospin of disassembling sources and temperature at a moderate
freeze-out density for medium-size Xe isotopes in the framework of isospin
dependent lattice gas model. Multiplicities of emitted light particles,
isotopic and isobaric ratios of light particles show the strong dependence on
the isospin of the dissociation source, but double ratios of light isotope
pairs and the critical temperature determined by the extreme values of some
critical observables are insensitive to the isospin of the systems. Values of
the power law parameter of cluster mass distribution, mean multiplicity of
intermediate mass fragments (), information entropy () and Campi's
second moment () also show a minor dependence on the isospin of Xe
isotopes at the critical point. In addition, the slopes of the average
multiplicites of the neutrons (), protons (), charged particles
(), and IMFs (), slopes of the largest fragment mass number
(), and the excitation energy per nucleon of the disassembling source
() to temperature are investigated as well as variances of the
distributions of , , , , and . It
is found that they can be taken as additional judgements to the critical
phenomena.Comment: 9 Pages, 8 figure
Genomic Deletion Marking an Emerging Subclone of Francisella tularensis subsp. holarctica in France and the Iberian Peninsula
P. 7465-7470Francisella tularensis subsp. holarctica is widely disseminated in North America and the boreal and temperate
regions of the Eurasian continent. Comparative genomic analyses identified a 1.59-kb genomic deletion specific
to F. tularensis subsp. holarctica isolates from Spain and France. Phylogenetic analysis of strains carrying this
deletion by multiple-locus variable-number tandem repeat analysis showed that the strains comprise a highly
related set of genotypes, implying that these strains were recently introduced or recently emerged by clonal
expansion in France and the Iberian PeninsulaS
Fluorescence-dip infrared spectroscopy and predissociation dynamics of OH A2â+ (v=4) radicals
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