P.J. Hayman
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Advanced Chemical Physics Studies
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Electron and X-Ray Spectroscopy Techniques
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
- High-pressure geophysics and materials
University of Auckland
2024
Carleton University
2022
McMaster University
2016-2021
Perimeter Institute
2016-2021
University of Liverpool
1993-2002
University of Coimbra
1998-2000
Liverpool Hospital
1983-1992
Laboratoire d’Annecy de Physique des Particules
1983-1988
Institut National de Physique Nucléaire et de Physique des Particules
1985-1988
European Organization for Nuclear Research
1988
The momentum spectrum of cosmic ray muons in the vertical direction at Durham has been measured for range 5-1000 GeV/c. high maximum detectable made possible by modification original spectrograph addition neon flash-tube arrays measuring levels. work described this paper is based on 14 556 particles, 4520 which had momenta above 20 GeV/c, and together with determined Geiger counter alone, Gardener et al. (1962) form a continuous from 0.4 GeV/c to 1000
Recent measurements of the sea-level spectra cosmic ray protons and muons have been used, together with a trial spectrum primary nucleons, to derive values for nucleon inelasticity Kt fraction energy passed on pion component Kπ in nucleon-air-nucleus collisions. It is shown that are not very sensitive model assumed collisions, effect fluctuations from one collision next found be small. Assuming value difference Kt-Kπ based results other experiments (approximately 0.12) it possible estimate...
The rate of energy loss muons is examined by com paring the observed depth-intensity relation with that predicted from a knowledge sea-level spectrum cosmic ray muons. evidence for each parameters entering into analysis assessed and estimates are made muon up to 10000 GeV down 7000 m.w.e. effect range-straggling on underground intensities considered shown be important at depths below 1000 Following previous workers written as -d E /d x =1.88+0.077 in ' m / mc 2 + b MeV g -1 cm , where...