Fluctuations of development maximum depth and nuclear composition of primary cosmic radiation

The extensive air showers (EAS) cascade curves from the Cerenkov light lateral distribution measurements are recovered and the maximum depth fluctuations of the shower development theta x sub m both on the Cerenkov and charged EAS components are defined. At E sub 0 approximates 10 to the 18th power eV the mean content of protons is greater than 85%, and p-air cross section theta sub 0 p-air 750mb

Molecular and crystal structure of 6-methyl-3-methoxy-2, 4,4-triphenyl-3-phenylimino-2,3,4,5-tetrahydro-1, 2,3-diazaphosphorine and 3-anilino-6-methyl-3-oxo-2,4, 4-triphenyl-2,3,4,5-tetrahydro-1,2,3-diazaphosphorine

1. 6-Methyl-3-methoxy-2,4,4-triphenyl-3-phenylimino-2,3,4,5-tetrahydro-1,2,3-diazaphosphorine exists as the monomer in the crystalline state. 2. The crystal and molecule structure of the tetrahydrodiazaphosphorine and its solvate with CH3OH added at the P=N bond was determined. © 1983 Plenum Publishing Corporation

Molecular and crystal structure of a product of the reaction of 5-methyl-2-phenyl-1,2,3-diazaphosphol with diazopropane

X-ray diffraction structural analysis established the structure of 2,2,6-trimethyl-1-oxo-1-hydro-4-phenyl-8-[α-phenylhydrazono]ethyl-4,5-diaza-1,3-diphosphabicyclo[3.3.03,7]oct-5-ene, in which a long conjugation chain is realized through the hydrazone group and the adjacent atoms. © 1984 Plenum Publishing Corporation

Molecular structure of cis-syn-cis isomer of 2,2,6,9-tetramethyl-4,11-diphenyl-4,5,10,11-tetraaza-1,3-diphosphatricyclo[6.3.0.03,7]undeca-5, 9-diene

It has been shown by x-ray structure analysis that the interaction of 2-phenyl-5-methyl-1,2,3-diazophosphole with diazopropane forms, along with the cis-anti-cis isomer, the cissyn-cis isomer of 2,2,6,9-tetramethy1-4,11-dipheny1-4,5,10,11-tetraaza-1,3-diphosphatricyclo-[6.3.0.03,7]undeca-5,9-diene. © 1985 Plenum Publishing Corporation

Synthesis and molecular structure of 2,2,6,9-tetramethyl-4, 11-diphenyl-4,5,10,11-tetraaza-1,3-diphosphatricyclo[6.3.0.03,7] undeca-5,9-diene

1. The reaction of 2-phenyl-5-methyl-1,2,3-diazaphosphole with diazapropane yields the first example of the cycloaddition of a phosphorus diylide at the dicoordinated phosphorus P=C bond. 2. X-ray structural analysis unequivocally indicated the structure of the product of this reaction and gave its molecular geometry. © 1983 Plenum Publishing Corporation

Update on the Combined Analysis of Muon Measurements from Nine Air Shower Experiments

Over the last two decades, various experiments have measured muon densities in extensive air showers over several orders of magnitude in primary energy. While some experiments observed differences in the muon densities between simulated and experimentally measured air showers, others reported no discrepancies. We will present an update of the meta-analysis of muon measurements from nine air shower experiments, covering shower energies between a few PeV and tens of EeV and muon threshold energies from a few 100 MeV to about 10GeV. In order to compare measurements from different experiments, their energy scale was cross-calibrated and the experimental data has been compared using a universal reference scale based on air shower simulations. Above 10 PeV, we find a muon excess with respect to simulations for all hadronic interaction models, which is increasing with shower energy. For EPOS-LHC and QGSJet-II.04 the significance of the slope of the increase is analyzed in detail under different assumptions of the individual experimental uncertainties

Molecular and crystal structure of 6-methyl-3-methoxy-2, 4,4-triphenyl-3-phenylimino-2,3,4,5-tetrahydro-1, 2,3-diazaphosphorine and 3-anilino-6-methyl-3-oxo-2,4, 4-triphenyl-2,3,4,5-tetrahydro-1,2,3-diazaphosphorine

1. 6-Methyl-3-methoxy-2,4,4-triphenyl-3-phenylimino-2,3,4,5-tetrahydro-1,2,3-diazaphosphorine exists as the monomer in the crystalline state. 2. The crystal and molecule structure of the tetrahydrodiazaphosphorine and its solvate with CH3OH added at the P=N bond was determined. © 1983 Plenum Publishing Corporation

New Barium Volatile Complexes Useful in CVD

New volatile barium precursors based on pivaloyltrifluoroacetone are obtained and studied. The results of X-ray structure determination of two compounds are given

Molecular structure of cis-syn-cis isomer of 2,2,6,9-tetramethyl-4,11-diphenyl-4,5,10,11-tetraaza-1,3-diphosphatricyclo[6.3.0.03,7]undeca-5, 9-diene

It has been shown by x-ray structure analysis that the interaction of 2-phenyl-5-methyl-1,2,3-diazophosphole with diazopropane forms, along with the cis-anti-cis isomer, the cissyn-cis isomer of 2,2,6,9-tetramethy1-4,11-dipheny1-4,5,10,11-tetraaza-1,3-diphosphatricyclo-[6.3.0.03,7]undeca-5,9-diene. © 1985 Plenum Publishing Corporation