Janssens180

Robert V.F. Janssens

Guest Professor
Nuclear Physics

Diploma in Physics, Universite Catholique de Louvain, Belgium, 1973
Ph.D., ibid., 1978

E-mail: janssens@anl.gov
Address: Argonne National Laboratory
Phone: (630) 252-8426
Fax: (630) 252-6210

Research Interests

My main research interests lie in the study of nuclear structure at the limits of stability, in high-Z nuclei and in neutron-rich nuclei. Most recently, we have initiated a program to investigate shell structure in neutron-rich nuclei just above 48Ca by combining a number of techniques and facilities. Our approach is one where we combine beta decay and intermediate-energy Coulomb excitation measurements performed at the NSCL with deep inelastic reactions or fusion-evaporation with radioactive targets carried out with Gammasphere at ATLAS. Another program at ATLAS uses Gammasphere to carry out so-called “unsafe” Coulomb excitation experiments on long-lived actinide nuclei in order to determine the important degrees of freedom responsible for the various excitations as a function of spin. I am also fascinated by the impact of structure on nuclear astrophysics processes and am participating in measurements in this area.

Over the years, I have supervised a number of graduate students who were based at ANL for their thesis research: D. Ye (U. Notre Dame, 1991), A.J.M. Plompen (Free U. Amsterdam, 1992), I.G. Bearden (Purdue U., 1993), D. Nisius (Purdue U., 1996), H. Amro (North Carolina State U., 1999), L.T. Brown (Vanderbilt U., 1999), K. Abu Saleem (Illinois Institute of Technology, 2002), X. Wang (U. Notre Dame, on-going).

Selected Publications

“Spectroscopy of the odd-odd fp-shell nucleus 52Sc from secondary fragmentation,” A. Gade, R.V.F. Janssens, et al., Phys. Rev. C 73, 037309 (2006)

“Cross-shell excitation in two-proton knockout: structure of 52Ca,” A. Gade, R.V.F. Janssens, et al., Phys. Rev. C 74, 0211302® (2006)

“Decay modes of 250No,” D. Peterson, B.B. Back, R.V.F. Janssens, et al., Phys. Rev. C 74, 014316 (2006)

“One-neutron knockout in the vicinity of the N = 32 sub-shell closure 9Be(57Cr,56Cr +g)X,” A. Gade, R.V.F. Janssens, et al., Phys. Rev. C 74, 047302 (2006)