Mary Macdermaid's pictureMary Macdermaid

Hope College

Dr. DeYoung and Dr. Peaslee (Nuclear Group)

Supported by the Michigan Space Grant Consortium

Angular Dependence of Light Charged Particle Correlations

A recent compilation of small-angle p-p correlation measurements seems to suggest that the deduced lifetime is dependent upon the angle of detection. This suggests that mechanisms other that statistical emission play a role. It is thought that non-equilibrium nucleon-nucleon scattering may be the cause of this behavior. This would account for the data as nucleon-nucleon scattering takes place on a short time scale and is directed forward. At the University of Notre Dame, we measured various charged particle correlation function for 72 MeV 16O+ 27Al. The light charged particles (p,d,t,alpha) were detected in an array of sixteen CsI detectors located at 20 degrees with a 3.27 degree opening angle. The data analysis is in progress, and the results will be compared to earlier measurements at larger scattering angles.

I was funded for research this summer by NASA and the Michigan Space Grant Consortium. I had a lot of fun working with the Hope College Nuclear Group and other research students. This is my second summer as a member of the group, and I'm looking forward to continuing my research in the fall.

At the beginning of the summer, we ran the research experiment described above, which gave us the opportunity to spend ten days at the University of Notre Dame. I learned a lot during that experience, and I'm glad to have been a part of it. (Not all things learned were academic... I learned that I don't want to live the rest of my life on fast food! Bluckth!)

Publications and Presentations:
“Coulomb Excitation of Giant Resonances with Heavy Ion Projectiles.” B.B. Hilldore*, B. Atallah*, P.A. DeYoung, L.Kiessel*, M.K. MacDermaid*, G.F. Peaslee, D. Bazin, K. Govaert, B. Sherrill, M. Thoennessen, J. Beene, B. Blank, M. Chartier, F. Liang, R. Varner. Paper 5P1.073. Division of Nuclear Physics Fall Meeting. East Lansing, MI, October 2002.
“Evidence of Non-Equilbrium Proton Emission in a Low-Energy Heavy-Ion Reaction.” P.A. DeYoung, M.J. Goupell*, B.V. Atallah*, J.A. Haglund*, P.L. Jovivette, M.K. MacDermaid*, G.F. Peaslee, J.J. Kolata, E.D. Bereners, D. Peterson, J. vonSchwarzenbert, and J.D. Hinnefeld. Phys.Rev. C 61, 024603 (2000).