Research Experiences for Undergraduates
Project Title: The MoNA Project
This summer I have worked on several different projects.These
include the MoNA Project, the 4H Transfer Project, and the BEARS
/ PACE project.MoNA, or Modular Neutron Array, is a project involving the
construction of a new high-efficiency Neutron Detector Array. The 4H
Transfer Project is an experiment done at the Notre Dame Nuclear Structure
Lab looking at a possible 4H transfer from a radioactive beam
of 8Li to various targets.The BEARS / PACE project involves
the investigation of inconsistencies between some old and new measurements
of the 197Au(11C,xn)208-xAt reaction.
After construction of these slats, I spend several weeks testing each one of them. Testing showed that each of them worked properly and that after some simple gain-matching of photomultipliers, all slats gave similar testing results. In light attenuation measurements, however, data was too curved to fit the expected exponential decay model. In an attempt to better understand this, my professor and I wrote a ray-tracing program to simulate light propagation in the slat. While results from this program are still preliminary, they do reproduce some of the unexpected results.
The 4H transfer project that I am working on is still in the preliminary data processing and analysis stages. Essentially, a previous experiment has shown what some believe to be a 4H transfer from a radioactive beam of 8Li onto a target. In an attempt to confirm or invalidate this hypothesis, a new experiment was done at Notre Dame. The three targets tested were 27Al, 12C, and 208Pb. So far data processing has been done to put the data in IDL format (to work with our analysis program), and gates have been created to isolate alpha-particle events, which are of interest in this experiment. Some preliminary spectra have been generated and sent to collaborators for their analysis.
Finally, I have done some work on the BEARS / PACE
project. BEARS stands for Berkeley Experiments with Accelerated Radioactive
Species. My work involved resolving some inconsistencies in some old and
new measurements of 197Au(11C,xn)208-xAt
reaction cross-sections. In the end, I found that there was a simple scalar
multiple that related the older and newer results. Finally, I re-ran some
PACE statistical calculations based on these new-scaled results. This analysis
is ongoing and will hopefully provide information on the possible difference
between 11C and 12C reaction cross-sections.
Publications and Presentations:
“The (8Li, α) reaction at Low Energy: Direct 4H Cluster Transfer?” F.D. Becchetti, R.S. Raymond, D.A. Roberts, J. Lucido, P.A. DeYoung, B. Hilldore*, J. Bychowski*, A.J. Huisman*, P.J. VanWylen*, J.J. Kolata, G. Rogachev, and J.D. Hinnefeld. Phys. Rev. C 71, 054610 (2005).
“Construction of a Modular Large-Area Neutron Detector.” T. Baumann, J. Boike*, J. Brown, M. Bullinger, J.P. Bychoswki*, S. Clark*, K. Daum*, P.A. DeYoung, J.V. Evans*, J. Finck, N. Frank, A. Grant, J. Hinnefeld, G.W. Hitt, R.H. Howes, B. Isselhartdt*, K.W. Kemper, J. Longacre*, Y. Lu, B. Luther, S.T. Marley*, D. Mccollum*, E. McDonald*, U. Onwuemene*, P.V. Pancella, G.F. Peaslee, W.A. Peters, M. Rajabali*, J. Robertson*, W.F. Rogers, S.L. Tabor, M. Thoennessen, E. Tryggestad, R.E. Turner*, P.J. VanWylen*, and N. Walker*. Nucl. Instr. And Meth. A543, 517 (2005).
“The MoNA Project.” P.J. VanWylen*, J.P. Bychowski*, P.A. DeYoung, G.F. Peaslee, and the MoNA Consortium. Paper 5P1.071. Division of Nuclear Physics Fall Meeting. East Lansing, MI, October 2002.