26 International

Cosmic Ray ConferenceSalt Lake City, Utah

August 17-25,1999

Volume 1

Contributed Papers

Sessions HE 1 and HE 2

UB/TIB Hannover 89

119 996 324

EditedbyD. Kieda, M. Salamon, & B. Dingus

Table of Contents: Volume 1

Session HE 1.1: Nucleus-nucleus and nucleus-nucleon interactions: accelerator experiments

HE 1.1.01 Fragmentation of 158 A GeV Pb ions on various targets 1

FirstAuthor: Dekhissi.H. Presenter: Serra,Paola

HE 1.1.02 Target Nuclei Excitation after Interactions of 10.6 GeV/Nucleon Gold Nuclei in 5

Emulsion

First Author: Wolter, Wladyslaw Presenter: Walter, Wladyslaw

HE 1.1.03 Study of Gold Nuclei Fragmentation due to NuclearInteractions at 10.6 GeV/nucleon 9

First Author: Wilczynska, BarbaraPresenter: Zhang, Naijian

HE 1.1.04 Updated Semiempirical Cross Sections for Cosmic Rays Propagation 13

First Author: Tsao, C.H. Presenter: Tsao, CM

HE 1.1.05 Simulation of the ion interactions for the ATIC experiment 17

First Author: Kim, H.J. Presenter: Kwon, Youngil

HE 1.1.06 Energy Determination of High Energy Cosmic ray Protons21

FirstAuthor: Sherif, MM Presenter: Sherif, MM

HE 1.1.07 Dissociation of C-12 and 0-16 into alpha particles inemulsion at 4.5A GeV/c 25

First Author: AbdelAziz, Sayed Presenter: Abdel Aziz, Sayed

HE 1.1.08 Study ofProjectile Fragmentation for Fe and Si Nuclei in Collisions with H, C, 29

Al, Cu, Ag and Pb

First Author: Flesch, Frank Presenter: Flesch, Frank

HE 1.1.09 Percolation Model for Nuclear Fragmentation of Si-28(Ne-22) at 4.5(4.1)A GeV/c 33

FirstAuthor: AbdelAziz, SayedPresenter: AbdelAziz, Sayed

HE 1.1.10 Cross Sections calculations of Li6-nucleus at high energies 37

First Author: Osman, Omar Presenter: Osman, Omar

HE 1.1.11 Multiplicity Characteristics of Emitted Particles in Heavy-Ion interactions with 41

emulation at 4.5A GeV/c

FirstAuthor: Abou Steit, Sameha Presenter: Abou Steit, Sameha

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Table of Contents: Volume 1

Multiplicity Correlation Studies in 4.5A GeV/c Nucleus-Nucleus Interactions 45

First Author: Salah, Afci/imoiwfPresenter: Salah, Mahmoud

Angular Correlations of Particles Emitted in Nucleus-Nucleus Interactions at 4.5A 49

GeV/c

First Author: Sadek, N. Presenter: Sadek, N.

Leading nucleon and the proton-nucleus inelasticity 53

First Author: Bellandi, Jose Presenter: Bellandi, Jose

Fragmentation ofrelativistic gold by various target nuclei 56

First Author: Waddington, Jake Presenter: Waddington, Jake

More Light on the Interactions ofHeavy Nuclei at Dubna Energy 60

First Author: Khalil,E.I. Presenter: Sherif, Mohammed

1.2 : Nucleus-nucleus and nucleus-nucleon interactions: cosmicray experiments

An Additional Characteristic Feature of Centauro Events 64

First Author: Brasil-Japan ofChacaltaya Emulsion Chamber Experiment Collaboration

Presenter: Shibuya, Edison

Fraction of gamma-hadron families similar to that of Fe induced against heavy 68

chemical composition ofprimary cosmic rays in the energy region around 10IB

eV

FirstAuthor: Kalmakhelidze,M. Presenter: Roinishvili, Nina

Hadron Component in Air Showers at Mt. Chacaltaya Experiment 72

First Author: Aguirre, C. Presenter: Kawasumi, N.

Azimuthal correlation peculiarities in gamma families with energies 76

£/''7 = 100- 2000 TeV

First Author: Yuldashbaev, Toymas Presenter: Yuldashbaev, Toymas

Characteristics of hadron-induced cascade showers in a thick lead chamber and 80

their physics implication

First Author: Tamada, Masanobu Presenter: Tamada, Masanobu

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Table of Contents: Volume 1

HE 1.2.08 Characteristics of gamma families simulated by QGSJET model 84

FirstAuthor: Borisov, A. Presenter: Krys, Andrzej

HE 1.2.10 The Distributions ofZenithal Angle of Hadrons registered in the Pamir Experiment 88

First Author: Huangs, Andreas Presenter: Malinowski, Jan

HE 1.2.11 The Spectrum ofHadrons' Energy measured in the Pamir Experiment 92

First Author: Malinowski, Jan Presenter: Malinowski, Jan

HE 1.2.13 The Phenomenon of Energy Concentration in High Energy Families 96

First Author: Ren, Jingru Presenter: Ren, Jingru

HE 1.2.14 Characteristics of gamma-hadron families against heavy chemical composition of 100

primary cosmic rays in the energy region around 10'6 eV

First Author: Kalmakhelidze,M. Presenter: Roinishvili, Nina

HE 1.2.16 Comparison ofexperimental and calculated data on gamma families with "halo" 104

First Author: Guseva, Z. Presenter: Puchkov, Vitalij S.

HE 1.2.17 An analysis of high energy cosmic-ray gamma-hadron families 107

First Author: Navia, C. E. Presenter: Navia, C. E,

HE 1.2.19 Coplanar events and multiproduction event generators in the knee region 111

First Author: Capdevielle, Jean-noel Presenter: Capdevielle, Jean-noel

HE 1.2.20 Leading Nucleon and the Hadronic Flux in the Atmosphere 115

First Author: BellandiJ. Presenter: Bellandi.J.

HE 1.2.21 Inelasticity Distribution of Hadron-Pb Collisions in the PamirLead Emulsion Chambers 119

First Author: Ohsawa, AkinoriPresenter: Ohsawa, Akinori

HE 1.2.23 On the Optical Density Spectrum of the PAMIR Emulsion Experiment 123

FirstAuthor: Haungs, AndreasPresenter: Haungs, Andreas

HE 1.2.24 Study on Alignment of High Energy Gamma-Hadron Family Event with Iron Emulsion 127

Chambers.

First Author: Xue, Liang Presenter: Xue, Liang

Table of Contents: Volume 1

) 1.3 : Theory and simulations

Test of High-Energy Hadronic Interaction Models using EAS Data 131

First Author: KASCADE Collaboration Presenter: Hoerandel, Joerg

Precision Test of Hadronic interaction Models with KASCADE Data 135

First Author: KASCADE CollaborationPresenter: Risse, Markus

Study ofjet production in p-N interactions at y/s w 500 GeV in EAS 139

multicore events

First Author: Aglietta, M. Presenter: Vigorito, Carlo

The observed mean free path and the p-air inelastic cross section of proton 143

primaries at tJu — ( '£- 4)10 '5ev

First Author: Aglietta, M. Presenter: Trinchero, Gian Carlo

Extensive air showers rounded up by AIRES + SIBYLL/QGSJET 147

First Author: Anchordoqui, Luis Presenter: Anchordoqui, Luis

A Color Mutation Hadronic Soft Interaction Model 151

First Author: Cao, Zhen Presenter: Cao, Zhen

Nuclear Interactions in 10IH ~ 102() eV 155

First Author: Ohsawa, Akinori Presenter: Ohsawa, Akinori

Energy Spectrum and Composition of Primary Cosmic Rays above 1018 eV 159

First Author: Nikolsky.T. Presenter: Nikolsky.T.

Is the cosmic ray centauro quark matter fireball metastable ? 163

First Author: Theodoratou, Olga Presenter: Theodoratou, Olga

Inelastic proton-air cross section in U.H.E. 167

First Author: Fleitas, Juliana Presenter: Fleitas, Juliana

Study of Multiplicity Correlations of Various Types of Seconderies in High Energy 171

Nucleus - Nucleus Collisions

First Author: Hegab, M.K. Presenter: Hassan, Nabila Mohamed

IV

Table of Contents: Volume 1

HE 13.15 Time Evolution of Fast Particles During the Decay of Hadronic Systems 175

First Author: Hussein, Mohamed TarekPresenter: Hussein, Mohamed Tarek

HE 13.16 Deformed Lorentz Symmetry and Ultra-High Energy Cosmic Rays 179

First Author: Gonzalez-Mestres, Luis Presenter: Gonzalez-Mestres, Luis

HE 13.19 Meson-Nucleus Inelastic Cross Section 183

First Author: Liland, Arne Presenter: Liland, Arne

HE 13.22 Total Cross Sections at current/Future Colliders, conventional models and QCD 186

First Author: Fazal-e-Aleem, FazalPresenter: Fazal-e-Aleem, Fazal

HE 13.23 Estimative of the Inelasticity Coefficient Using the Energy Spectrum of the 190

HAdrons, Electrons and Photons

First Author: Portella.HM. Presenter: Portella.HM.

HE 13.24 Cross-section of inelastic interaction of hadrons with iron nuclei 194

First Author: Novalov.AA. Presenter: NovalovA.A.

HE 13.25 Total pp Cross Section Estimations at Very High Energies 198

First Author: Velasco.J. Presenter: Perez-Peraza, J.

HE 13.26 Heavy Ion stripping reactions at Intermediate Energies 202

First Author: EINadi, M. Presenter: EINadi.M.

HE 13.28 Inelasticity in Proton-Air Collisions fromCosmic Ray Data 206

First Author: Bhadra.A. Presenter: Bhadra.A.

HE 13.29 Electron - Proton Scattering as aProbe ofNucleon Structure 210

First Author: Hussein, Mohamed Tarek Presenter: Hussein, Mohamed Tarek

Session HE 2.2: New Results (10u < EvrimarV < 10l7eV)

HE 2.2.01 The Energy Spectrum of Charged Cosmic Rays between 1014 eV and 10lfl eV 214

determined with the HEGRA Arrays

First Author: HEGRA CollaborationPresenter: Roehring, Andre

Table of Contents: Volume 1

Cosmic Ray Energy Spectrum around the Knee by Muon Density Measurements at 218

KASCADE

First Author: KASCADE Collaboration Presenter: Haungs, Andreas

Analysis of Electron and Muon Size Spectra of EAS 222

First Author: KASCADE Collaboration Presenter: Glasstetter, Ralph

Estimation ofthe Energy Spectrumin the Knee Region by the KASCADE-Experiment 226

First Author: KASCADE Collaboration Presenter: Chilingarian,Ashot

Study of the knee structure in the EAS electron and muon components 230

First Author: Aglietta, M. Presenter: Chiavassa, Andrea

Preliminary Results on Size spectrum and age parameter ofEAS from KGF Experiment 234

First Author: Acharya.B.S. Presenter: Sivaprasad, K

The size spectrum of small Air Shower at Ooty GRAPES III (800g/cm2) 236

First Author: Hayashi, Y. Presenter: Kawakami, Saburo

The EAS Size Spectrum measured at ANI Cosmic Ray Observatory in the region of 240

Knee

First Author: Chilingarian, AshotPresenter: Chilingarian, Ashot

New Data on the Difference of Parameters of EAS Selected According to their Size 244

or CherenkovLightFlux

First Author: Yakovlev, V.I Presenter: Yakovlev, V.I

Search for Coincidental Air Showers from the Direction of the Crab Using the 248

Network Observation

First Author: Ochi, NobuakiPresenter: Ochi, Nobuaki

Search for < <Neutron Bursts> > with Mexico City Neutron Monitor 252

First Author: Stenkin, Yu. V. Presenter: Stenkin, Yu.V.

What Happens in EAS at N > 10w Particles? 256

First Author: Yakovlev,V.I. Presenter: Yakovlev.V.I.

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Table of Contents: Volume 1

HE 2.2.15 Measurement of the EAS muon characteristics in the knee region on the mountain 260

level

First Author: Chilingarian, Ashot Presenter: Martirosov, Romen

HE 2.2.16 Correlations between parameters of extended air showers and their proper use in 264

analysesFirst Author: Wittek, Wolfgang Presenter: Wittek, Wolfgang

HE2.2.17 May gammas ofenergies 10'5 - 10'e eV frompoint sources be observed ? 268

First Author: Krys, Elzbieta Presenter: Krys, Elzbieta

HE 2.2.19 High energy muon transverse separation and the determination of CR composition 272

FirstAuthor: Mualem, Leon Presenter: Mualem, Leon

HE 2.2.22 A Study on the Lateral Structure ofMuons in Extensive Air Showers with the 276

GRAPES Array at Ooty

First Author: Hayashi, Yoshio Presenter: Hayashi, Yoshio

HE 2.2.23 Strategy for CompositionMeasurements with SPASE 280

FirstAuthor: Gaisser, Tom Presenter: Gaisser, Tom

HE 2.2.24 Core structure of extensive air showers 282

First Author: Kempa, Janusz Presenter: Kempa, Janusz

HE 2.2.26 New Results of the EAS-1000 Prototype Operation 286

First Author: Fomin, Yuri Presenter: Fomin, Yuri

HE 2.2.27 The fluctuations ofEAS core at Akeno 290

First Author: Sakuyama, Hiroshi Presenter: Sakuyama, Hiroshi

HE 2.2.28 Arrival timedistribution ofEAS usingCherenkov detectors at Taro 294

First Author: Sakuyama, Hiroshi Presenter: Sakuyama, Hiroshi

HE 2.2.29 On the Origin of Coincident Delayed ScintillatorPulses Observed with an EAS 298

ArrayFirst Author: Arvela, Harri Presenter: Arvela, Harri

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Table of Contents: Volume 1

Analytical Procedure for the Test of Nonlinearity in the Arrival Times of Air 301

Showers

First Author: Ochi, Nobuaki Presenter: Ochi, Nobuaki

Considerations about the lateral distribution ofelectrons in proton-initiated 305

air showers at energies below 10'5 eV

First Author: Ortiz, Jeferson Altenhofen Presenter: Ortiz, Jeferson Altenhofen

Fractal Study ofExtensive Air Shower Time Series 309

First Author: Harada, T. Presenter: Takahashi, Tamotsu

Firstresults ofprimary cosmic ray spectrum measurements using balloon-borne 313

detector SPHERE

First Author: Antonov, Rem Presenter: Antonov, Rem

Observation ofshower excess form the discrete source ofCyg X-3. 317

First Author: Novalov,A.A. Presenter: Novalov,A.A.

A Model Independent Method for Determination of Muon Density Fluctuations in EAS 321

First Author: Giller, Maria Presenter: Giller, Maria

Studies of the realtive arrival time distributions ofthe electromagnetic and the 325

muon EAS component in the KASCADE ExperimentFirst Author: KASCADE Collaboration Presenter: Haeusler, Rdiger

Estimate of the Cosmic Ray Composition by a Pattern Analysis of the Core ofPeV 329

EAS

First Author: KASCADE CollaborationPresenter: Haungs, Andreas

A Multivariate Approach for the Determination of the Mass Composition in the Knee 333

RegionFirst Author: KASCADE Collaboration Presenter: Roth, Markus

First Measurement of the Knee in the Hadronic Component of EAS 337

First Author: KASCADE Collaboration Presenter: Hoerandel, Joerg

Analysis of the Muon/Electron Ratio in EAS 341

First Author: KASCADE Collaboration Presenter: Weber, Jennifer H.

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Table of Contents: Volume 1

HE 2.2.43 EAS Muon Arrival Time Distributions Measured in the KASCADE Experiment 345

First Author: KASCADE CollaborationPresenter: Brancus, Iliana

HE 2.2.44 Estimation of the Primary Mass with Hadronic Observables inEAS Cores 349

First Author: KASCADE CollaborationPresenter: Engler, Joachim

Session HE 23 : New Results (Eprimary > 1017 eV)

HE 23.01 Characteristics of Giant Air Showers with Energy larger than 1019 eV 353

Observed by AGASA

First Author: Hayashida, N. Presenter: Sakaki, Naoto

HE 23.02 Muon Component in Giant Air Showers with Energy of > 10'HeV Observed by 357

AGASA

First Author: The AGASA CollaborationPresenter: Naoya, Inoue

HE 23.03 Characteristics of Inclined Giant Air Showers Observed by AGASA 361

First Author: The AGASA CollaborationYresenter: Naoya, Inoue

HE 23.04 Near Horizontal Showers detected with the Haverah Park Array 365

First Author: Ave, M. Presenter: Vazquez, Ricardo

HE 23.05 Array for measurement ofthe EAS pulsetemporal structure at distances R>500 m 369

First Author: Fernandez, ArturoPresenter: Fernandez, Arturo

HE 23.06 Longitudinal EAS Development at Eo = 10**18 - 3* 10** 19 eV and the QGSJET Model 372

FirstAuthor: Knurenko, S.P. Presenter: Sleptsova, Venera

HE 23.07 The Possible Interpretation of Experimental Results of Cosmic Ray Particles with 376

Energies Exceeding 10u) eV at AGASA Array

First Author: Chechin, V.A. Presenter: Chechin.VA.

HE 23.08 Absorption Curves of Muons and Muon Cascades in Air 380

First Author: Nikiforova, Elena Presenter: Nikiforova, Elena

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Table of Contents: Volume 1

Optical emission from UHE Cosmic Rays 384

First Author: Boruah, Kalyanee Presenter: Boruah, Kalyanee

Temporal Structureofthe Muon DiskatLarge Distances from Core ofEAS with 387

E0 > 6x 1018 eV

First Author: Glushkov,A. V. Presenter: Glushkov,A. V.

UHE Cosmic Ray Energy Spectrum Derived From Gauhati University Mini Array Data 391

First Author: Boruah, Pradip Kumar Presenter: Boruah, Pradip Kumar

Characteristics of Age Parameter for Giant Air Showers 395

First Author: Saikia, Julie Presenter: Saikia, Julie

Electrons and Muons in EAS at K0 > 5 X 10'7 eV 399

First Author: Glushkov.A.V. Presenter: Glushkov,A.V.

Azimuthal effect on extensive air showers of cosmic rays 403

First Author: Ivanov,A. Presenter: Pravdin, Mikhail

Analysis of cosmic ray anisotropy at energy 10'7 eV in sidereal time 407

First Author: Pravdin, M.I. Presenter: Mikhailov, Alexei

E 2.5 : Theory and simulations

Air Shower Simulations with the AIRES System 411

First Author: Sciutto, Sergio J. Presenter: Sciutto, Sergio J.

Air Shower Calculations With the New Version of SIBYLL 415

First Author: Engel, Ralph Presenter: Engel, Ralph

Realistic nuclear densities and their influence on calculated EAS characteristics 419

First Author: Kalmykov, Nikolai Presenter: Kalmykov, Nikolai

New energy estimates of the giant air showers 423

First Author: Antonov, E.E. Presenter: Dedenko, Leonid

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Table of Contents: Volume 1

HE 2.5.06 A method to estimate primary composition with the Auger Observatory 426

First Author: de Carvalho, Luiz America Presenter: de Carvalho, Luiz Americo

HE 2.5.08 Gamma Hadron Discrimination with a Neural Network in the ARGO-YBJ Experiment 430

First Author: Bussino, Severino Presenter: Bussino, Severino

HE 2.5.09 About a new method for selection of EAS initiated by primary gamma-quanta with 434

energies 102-104TeV

First Author: Brankova, Milena Presenter: Brankova, Milena

HE 2.5.10 Energy determination in giant EAS 437

First Author: Capdevielle, Jean-noel Presenter: Capdevielle, Jean-noel

HE 2.5.11 Application of Thermodynamical Description ofHadron Production at High Energies 441

of EAS

First Author: KPPG Collaboration Presenter: Kamberov, George

HE 2.5.12 Correlating Primary Type with the Longitudinal Profile 445

First Author: Mikulski, PaulPresenter: Mikulski, Paul

HE 2.5.13 Most precise determination of arrival direction of the giant air showers 449

First Author: Antonov, E.E. Presenter: Dedenko, Leonid

HE 2.5.14 Nottingham-MSU INTAS Mass Composition Project 452

First Author: Brookes, John Presenter: Brookes, John

HE 2.5.16 Mechanism ofDepth-Variation of Moliere Angular Distribution 455

First Author: Nakatsuka, Takao Presenter: Nakatsuka, Takao

HE 2.5.17 Selection of showers with given energies at the GAMMA experiment (Armenia) 459

First Author: Gariaka, AP. Presenter: Procureur, Jacques

HE 2.5.18 Identification of Gamma-rays and Protons with Feed-Forward Neural Network 463

First Author: Kong.F.M. Presenter: Kong.F.M.

HE 2.5.19 Study on Multifractal Structure ofthe DistributionFluctuation of Secondary 467

Particles in the Core Region of EAS

First Author: Kong,FM. Presenter: Kong.FM.

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Table of Contents: Volume 1

EAS CerenkovLight SimulationsTaking Geomagnetic Field Into Account 471

First Author: Beisembayev, R. U. Presenter: Galkin, Vladimir

Deposited Energy Distribution in the Giant Showers in Water 475

First Author: Dedenko, LeonidPresenter: Dedenko, Leonid

Particle density distributions ofinclined air showers 478

First Author: Dova, M.T. Presenter: Mariazzi, Analisa

Multiproductionat UHE and simulationofgiantEAS 482

First Author: Capdevielle, Jean-noel Presenter: Capdevielle, Jean-noel

Moliere AngularDistribution UnderThe Process With Ionization 486

First Author: Nakatsuka, Takao Presenter: Nakatsuka, Takao

Thinning of High-Energy Cosmic-Ray Air-Showers 490

First Author: The Pierre Auger Collaboration Presenter: Kobal, Matjaz

Identification ofPrimary Proton Component at the "Knee" Region 494

First Author: Cunfeng.Feng Presenter: Cunfeng,Feng

Recent Additions to the Extensive Air Shower Simulation Code CORSIKA 498

First Author: KASCADE CollaborationPresenter: Heck, Dieter

A Simulation Study of Linsley's Approach to infer Elongation Rate and 502

Fluctuations of the EAS Maximum Depth from Muon Arrival Time Distributions

First Author: Badea, Florin A. Presenter: Badea, FlorinA.

EeV Hadronic Showers in Ice: The LPM effect 506

First Author: Alvarez-Muniz, Jaime Presenter: Alvarez-Muniz, Jaime

Muon content of UHE air shower simulated with different hadronic models 510

First Author: Espinosa, Maria del MarPresenter: Espinosa, Maria del Mar

Monte Carlo Modelling of Radio Emission from Extensive Air Showers 514

First Author: Dova, M!T. Presenter: Swain, John

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Table of Contents: Volume 1

HE 2.535 Study on Muon Flux and Reconstruction Methods with CORSIKA code 518

First Author: Oliveira, MarceloPresenter: Oliveira, Marcelo

HE 2.536 Relations of Two Moliere Theories: That Formulated by Kamata and Nishimura and 522

That by Moliere and Bethe

First Author: Nakatsuka, Takao Presenter: Nakatsuka, Takao

HE 2.5.40 Some Aspects of Superhigh Energy Cosmic Ray Investigation 526

First Author: Fomin, YuriPresenter: Fomin, Yuri

HE 2.5.41 Universal multifractal parameters of fluctuations in E.A.S. produced by different 530

primary cosmic rays

First Author: Faleiro, Eduardo Presenter: Faleiro, Eduardo

xiu