A. Insolia - Academia.edu (original) (raw)

Papers by A. Insolia

The European Physical Journal C, 2015

Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of... more Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highestenergy cosmic rays with E ≥ 6 × 10 19 eV by analyzing cosmic rays with energies above E = 5 × 10 18 eV arriving within an angular separation of approximately 15°. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.

Thinking, Observing and Mining the Universe - Proceedings of the International Conference, 2004

We propose a possible approach for thè determination of very high energy cosmic ray primary mass ... more We propose a possible approach for thè determination of very high energy cosmic ray primary mass A based on thè information provided by thè reconstruction of shower longitudinal development in thè Earth atmosphere. We refer to an apparatus such as thè Pierre Auger Observatory, which is a unique "hybrid" UHECR detector. The surface detector (SD) and air fluorescence detector (FD) of thè observatory are designed for observation of cosmic ray showers in coincidence, with a 10% duty cycle, with resulting data expected to be superior in quality especially for thè primary energy EQ which is determined with a 5% accuracy. We present results obtained using an approach for thè determination of A in thè individuai event based on only FD information (MMM-'Minimum Momentum Method'). This approach shows that, if thè entire information contained in thè longitudinal profile is exploited, reliable results may be obtained.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990

... Instr. and Meth. 120 (1974) 437, MP Budiansky, SP Ahlen and G. Tarle, Nucl. Instr. and Melh. ... more ... Instr. and Meth. 120 (1974) 437, MP Budiansky, SP Ahlen and G. Tarle, Nucl. Instr. and Melh. ... 210, Stanford, CA, USA (1978). [8] C. Michel, E. Grosse, H. Noll, H. Dabrowski, H. Heckwolf, O. Klepper, WFJ Muller and H. Stelzer, Nucl. Instr. and Meth. A243 (19ig6) 395. References. ...

Journal of Cosmology and Astroparticle Physics

We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in... more We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late

A high statistics sample of Lambdas produced in 2 GeV/nucleon (58)Ni(+) + (nat)Cu collisions has ... more A high statistics sample of Lambdas produced in 2 GeV/nucleon (58)Ni(+) + (nat)Cu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. The coverage of the EOS TPC is essentially 100% for y greater than y(cm) and extends dow n to P(Tau) = 0 where interesting effects such as collective radial expansion may be important. In

Il Nuovo Cimento A, 1977

ABSTRACT

Lettere Al Nuovo Cimento Series 2, 1984

ABSTRACT Summary A simple interpretation of the existence of a l-window in complete fusion reacti... more ABSTRACT Summary A simple interpretation of the existence of a l-window in complete fusion reactions between heavy ions is suggested. The dependence of the calculated impact parameters leading to fusion vs. Vrel/C exhibits strong analogies with the findings in the collision of two water droplets.

Lettere al Nuovo Cimento, 1982

Summary Level density limitation to fusion is analysed from a phenomenological point of view. We... more Summary Level density limitation to fusion is analysed from a phenomenological point of view. We find that the values EMax c.m. at which the fusion cross-rection exhibits the maxima correspond to a nuclear temperature almost independent of the reaction. It is suggested that the interplay between entrance-channel effects and compound-nucleus properties are responsible for the observed behaviour.

Nuclear Physics A, 1992

ABSTRACT

Physics Letters B, 1984

ABSTRACT We suggest a simple interpretation of the existence of a low-l cut off in the angular mo... more ABSTRACT We suggest a simple interpretation of the existence of a low-l cut off in the angular momenta leading to complete fusion. An l-window model for the description of the fusion process is proposed. No adjustable parameters are used in the calculation of the cross section. Comparison with available TDHF calculations and with experimental data are shown. Also at: Dipartimento di Fisica, Università di Lecce, Lecce, Italy.

Structure and Dynamics of Elementary Matter, 2004

The European Physical Journal C, 2015

Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of... more Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highestenergy cosmic rays with E ≥ 6 × 10 19 eV by analyzing cosmic rays with energies above E = 5 × 10 18 eV arriving within an angular separation of approximately 15°. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.

Thinking, Observing and Mining the Universe - Proceedings of the International Conference, 2004

We propose a possible approach for thè determination of very high energy cosmic ray primary mass ... more We propose a possible approach for thè determination of very high energy cosmic ray primary mass A based on thè information provided by thè reconstruction of shower longitudinal development in thè Earth atmosphere. We refer to an apparatus such as thè Pierre Auger Observatory, which is a unique "hybrid" UHECR detector. The surface detector (SD) and air fluorescence detector (FD) of thè observatory are designed for observation of cosmic ray showers in coincidence, with a 10% duty cycle, with resulting data expected to be superior in quality especially for thè primary energy EQ which is determined with a 5% accuracy. We present results obtained using an approach for thè determination of A in thè individuai event based on only FD information (MMM-'Minimum Momentum Method'). This approach shows that, if thè entire information contained in thè longitudinal profile is exploited, reliable results may be obtained.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990

... Instr. and Meth. 120 (1974) 437, MP Budiansky, SP Ahlen and G. Tarle, Nucl. Instr. and Melh. ... more ... Instr. and Meth. 120 (1974) 437, MP Budiansky, SP Ahlen and G. Tarle, Nucl. Instr. and Melh. ... 210, Stanford, CA, USA (1978). [8] C. Michel, E. Grosse, H. Noll, H. Dabrowski, H. Heckwolf, O. Klepper, WFJ Muller and H. Stelzer, Nucl. Instr. and Meth. A243 (19ig6) 395. References. ...

Journal of Cosmology and Astroparticle Physics

We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in... more We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late

A high statistics sample of Lambdas produced in 2 GeV/nucleon (58)Ni(+) + (nat)Cu collisions has ... more A high statistics sample of Lambdas produced in 2 GeV/nucleon (58)Ni(+) + (nat)Cu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. The coverage of the EOS TPC is essentially 100% for y greater than y(cm) and extends dow n to P(Tau) = 0 where interesting effects such as collective radial expansion may be important. In

Il Nuovo Cimento A, 1977

ABSTRACT

Lettere Al Nuovo Cimento Series 2, 1984

ABSTRACT Summary A simple interpretation of the existence of a l-window in complete fusion reacti... more ABSTRACT Summary A simple interpretation of the existence of a l-window in complete fusion reactions between heavy ions is suggested. The dependence of the calculated impact parameters leading to fusion vs. Vrel/C exhibits strong analogies with the findings in the collision of two water droplets.

Lettere al Nuovo Cimento, 1982

Summary Level density limitation to fusion is analysed from a phenomenological point of view. We... more Summary Level density limitation to fusion is analysed from a phenomenological point of view. We find that the values EMax c.m. at which the fusion cross-rection exhibits the maxima correspond to a nuclear temperature almost independent of the reaction. It is suggested that the interplay between entrance-channel effects and compound-nucleus properties are responsible for the observed behaviour.

Nuclear Physics A, 1992

ABSTRACT

Physics Letters B, 1984

ABSTRACT We suggest a simple interpretation of the existence of a low-l cut off in the angular mo... more ABSTRACT We suggest a simple interpretation of the existence of a low-l cut off in the angular momenta leading to complete fusion. An l-window model for the description of the fusion process is proposed. No adjustable parameters are used in the calculation of the cross section. Comparison with available TDHF calculations and with experimental data are shown. Also at: Dipartimento di Fisica, Università di Lecce, Lecce, Italy.

Structure and Dynamics of Elementary Matter, 2004