Charles F. Perdrisat

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Charles François Perdrisat (born July 1, 1932 in Geneva ) is a Swiss nuclear physicist .

In 1951 Perdrisat received an engineering degree from the Technikum in Geneva, studied physics at the University of Geneva with a licentiate in 1956 and received his doctorate in 1961 from the ETH Zurich . As a postdoctoral fellow he was at the Institute for Theoretical Physics at the University of Bonn and the University of Illinois at Urbana-Champaign , where he became Assistant Professor in 1965. He has been Assistant Professor at the College of William & Mary in Williamsburg (Virginia) since 1966, with a full professorship since 1976, and experiments at the Thomas Jefferson National Accelerator Facility (TJNAF, Jefferson Lab) and its forerunner CEBAF. He was there as a consultant as early as 1995 and then several times visiting professor.

He built a proton polarimeter (FPP) at the TJNAF and its forerunner and measured the ratio of the electrical to the magnetic elastic form factor of the proton and neutron for energies (transferred square of the four-pulse Q²) up to 3.5 GeV², continued in the 1990s in the 2000s up to 6 GeV² and planned up to 9 GeV² for scattering with electrons taking into account the polarization. Neutrons were also studied later. These form factors give clues to the quark distribution in nucleons, and the polarized experiments produced three-dimensional images of the quark distributions with spin parallel or antiparallel to the nucleon spin. Surprisingly, the ratio was not constant, but decreased by a factor of 3.7 over the range from 1 to 5.6 GeV². This also led to the further development of the QCD-based theoretical models for describing the nucleon structure (lattice theories, Vector Dominance Model VDM, Relativistic Constituent Quark Model RCQM, Generalized Parton Distribution GPD, Dyson-Schwinger equations, Cloudy Bag Model in light front formalism, etc.).

He also studies polarization phenomena at deuteron-proton and deuteron-nucleus scattering.

In 1981/82 he was visiting professor at the Institut national de physique nucléaire et de physique des particules in Orsay and in 1973/74 at the ETH Zurich.

For 2017 he received the Tom W. Bonner Prize for Nuclear Physics for fundamental measurements of the structure of nucleons with the discovery of an unexpected behavior of the electrical and magnetic form factor with the momentum transfer .

In 2002 he became a Fellow of the American Physical Society .

Fonts

  • with John Arrington, Kees de Jager: Nucleon Form Factors - A Jefferson Lab Perspective. J. Phys. Conf. Ser., Vol. 299, 2011, p. 012002, Arxiv
  • with Vina Punjabi: Nucleon form factors. Scholarpedia, 2010, online

Web links

Individual evidence

  1. ↑ Dates of birth according to American Men and Women of Science , Thomson Gale 2004
  2. ↑ Laudation, Bonn Prize
personal data
SURNAME Perdrisat, Charles F.
ALTERNATIVE NAMES Perdrisat, Charles Francois (full name)
BRIEF DESCRIPTION Swiss nuclear physicist
DATE OF BIRTH July 1, 1932
PLACE OF BIRTH Geneva