Steve Sundbeck's Summer Research Report

Steve Sundbeck's picture Steve Sundbeck

Hope College

Dr. DeYoung, Dr. Peaslee, Dr. Mader (Nuclear Group)

Supported by NSF-RUI

This summer, I worked in the Nuclear Physics Summer Research Group at Hope College. I was a kind of "utility infielder" this summer, working for the triumvirate of Dr. Paul DeYoung, Dr. Catherine Mader, and Dr. Graham Peaslee. At the start of the summer, I finished analysis and modeling of 16O + 27Al @640 MeV data taken in 1991 at the National Superconducting Cyclotron Laboratory at Michigan State University. When this was done I aided Matt Barton with preparational calculations for his experiment at Notre Dame's Nuclear Structure Laboratory. I also was on staff for the data collection of that experiment. Toward the end of this summer and into the fall, I started preparing neutron detectors for another experiment at Notre Dame.

All of this data analysis and calculation was done using the statistical model code MODGAN. In an effort to make this code clearer, more reliable, and easier to use, I, along with my colleagues Casey Carney, Mary MacDermaid, and Stephen Coll, have been editing the FORTRAN code of MODGAN. Our goals are to increase the efficiency of the code and make it easier to understand through use of "pretty" code and increased commenting. We have largely accomplished this test, having edited almost 100 subroutines, and are now commencing on the main code. I have given a Hope College Physics Department seminar on this work, and have plans to take a version of this talk to the Pew Consortium conference later this year.

Publications and Presentations:
“Nuclear disassembly in Violent Central Collisions at Intermediate Energies: 65-115 AMeV ⁴⁰Ar+Cu, Ag, Au.” E. Colin, Rulin Sun, N.N. Ajitanand, John M. Alexander, M.A. Barton*, P.A. DeYoung, K.L. Drake*, A. Elmaani, C.J. Gelderloos, E.E. Gualtieri, D. Guinet, S. hannuschke, J.A. Jaasma, L. Kowalski, Roy A. Lacey, J. Lauret, E. Norbeck, R. Pak, G.F. Peaslee, M. Stern, N.T.B Stone, S.D. Sundbeck*, A.M. VanderMolen, G.D. Westfall, and J.Yee. Phys. Rev. C 61, 067602 (2000).
“Isotropic Emission Components in Splintering Central Collisions: 17-115 AMeV⁴⁰Ar+Cu, Ag, Au.” Rulin Sun, E. Colin, N.N. Ajitanand, John M. Alexander, M.A. Barton*, P.A. DeYoung, K.L. Drake*, A. Elmaani, C.J. Gelderloos, E.E. Gualtieri, D. Guinet, S. Hannuschke, J.A. Jaasma*, L. Kowalski, Roy A. Lacey, J. Lauret, E. Norbeck, R. Pak, G.F. Peaslee, M. Stern, N.T.B. Stone, S.D. Sundbeck*, A.M. VanderMolen, G.D. Westfall, L.B. Yang, and J. Yee. Phys. Rev. C 61, 061601 (R) (2000).
“Balance of Mass, Momentum, and Energy in Splintering Central Collisions for ⁴⁰Ar up to 115 MeV/Nucleon.” Rulin Sun, E. Collin, N.N. Ajitanand, John M. Alexander, M.A. Barton*, P.A. DeYoung, K.L. Drake, A. Elmmaani, C.J. Gelderloos, E.E. Gualtieri, D. Guinet, S. Hannuschke, J.A. Jaasma*, L. Kowalski, Roy A. Lacey, J. Lauret, E. Norbeck, R. Pak, G.F. Peaslee, M. Stern, N.T.B Stone, S.D. Sundbeck*, A.M. VanderMolen, G.D. Westfall, L.B. Yang, and J. Yee. Phys. Rev. Lett. 84, 43 (2000).
“Splintering Central Collisions: Systematics of Momentum and Energy Deposition for (17-115) A MeV ⁴⁰Ar.” E. Colin, Rulin Sun, N.N. Ajitanand, John M. Alexander, M.A. Barton*, P.A. DeYoung, A. Elmaani, C.J. Gelderloos, E.E. Gualtieri, D. Guinet, S. Hannuschke, J.A. Jaasma*, L. Kowalski, Roy A. Lacey, J. Lauret, E. Norbeck, R. Pak, G.F. Peaslee, M. Stern, N.T.B. Stone, S.D. Sundbeck*, A.M. VanderMolen, G.D. Westfall, and J. Yee. Phys. Rev. C 57, R1032 (1998).
“Sensitivity of Small-Angle Correlations of Light Charged Particles to Reaction Mechanisms in the ¹⁶O+²⁷Al Reaction at 40 MeV/nucleon.” P.A. DeYoung, C. Dykstra*, P. Gonthier, C. Mader, G.F. Peaslee, D. Peterson*, R. Sedlar*, S. Sundbeck*, N. Shaw*, G. Westfall, D. Craig, R. Lacey, T. Li, T. Reposeur, A. VanderMolen, J.S. Winfield, S. Yennello, and A. Nadasen. Phys. Rev. C 56, 244 (1997).
“A Search for Collective Expansion in Central Collision of Xe+Sn and Kr+Nb.” J. Lauret, R.A. Lacey, A. Mores, J. Alexander, N.N. Akotamamd, D. Craig, E.E. Gaultier, S. Hannuschke, T. Li, W.J. Lope, R. Pak, A.M. VanderMolen, N. Stone, G.D. Westfall, J.S. Winfield, J. Yee, G.F. Peaslee, M.A. Barton*, T.A. Bredeweg*, P.A. DeYoung, C.J. Dykstra, and S.D. Sundbeck*. Bull. Am. Phys. Soc. 39, 1427 (1994).
“Correlation Functions Involving Neutrons from the ¹⁶O+²⁷Al Reaction at 220 MeV.” S.D. Sundbeck*, P.A. DeYoung, T. Buter, C. Dykstra*, G Filfoyle, M. Nimcheck, A. Snyder, J. Hinnefeld, M. Kaplan, J.J. Kolata, J. Kugi, P. Santi, W. Chung, and R. Kryger. PEW Midstates Consortium Undergraduate Research Symposium, Washington University, October 1994.