Hope College Physics Department
Research Experiences for Undergraduates
Summer 2008
Project Summary

 

Project Title: Experimental Observation of Decay Energy of 12Li
Student Name: Chris Hall
Student's Home Institution: Hope College
Research Advisor: Dr. Paul DeYoung and Dr. Graham Peaslee
Source of Support: This material is based upon work supported by the National Science Foundation under Grant No. PHY-0354920.

The goal of this experiment was to find the ground state energies for 12,13Li. These isotopes are of interest as they exist along the neutron dripline and are highly unstable and thus have never been studied before. Gaining a better understanding of them will allow for better modeling of nuclear structure. Also there is the interesting possibility that 13Li may be bound with respect to one neutron emissions. The 12,13Li were created using a 14B and 14Be beam created at the National Superconducting Cyclotron Lab impinged on a 470 mg/cm2 Be target. Then both isotopes decay to 11Li which is analyzed in the Sweeper magnet and detector array while the coincident neutrons are detected by MoNA. By reconstructing the energy of the fragments and corresponding neutrons the ground state, and possibly excited state, energies of 12,13Li can by found.
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Publications and Presentations:
" Comparison of Glass Fragments Using Particle Induced X-Ray Emission (PIXE) Spectrometry." P.A. DeYoung, P.J. Mears*, C.C. Hall*, D.J. Padilla*, R.A. Sampson*, and G.F. Peaslee. Scheduled for publication in the Journal of Forensic Sciences, (2011).
“Forensic Analysis of Tempered Sheet Glass by Particle Induced X Ray Emission (PIXE)” L. J. Jisonna, P. A. DeYoung, J. Ferens*, C. Hall*, J. M. Lunderberg*, P. Mears*, D. Padilla*, G. F. Peaslee, and R. Sampson*. Nucl. Instr. And Meth. B, Nucl. Instr. And Meth. B (2011).
“Spectroscopy of 13Li”, E.M. Lunderberg*, C.C. Hall*, P.A. DeYoung, M. Thoennessen, J. Snyder, and Mona Collaboration. Division of Nuclear Physics of the APS meeting, East Lansing MI, October 2011.
"First observation of excited states in 12Li" C.C. Hall*, E.M. Lunderberg*, P.A. DeYoung, T. Baumann, D. Bazin, G. Blanchon, A. Bonaccorso, B.A. Brown, J. Brown, G. Christian, D.H. Denby*, J. Finck, N. Frank, A. Gade, J. Hinnefeld, C.R. Hoffman, B. Luther, S. Mosby, W.A. Peters, A. Spyrou, and M. Thoennessen. Phys. Rev. C 81, 021301(R) (2010).

"Efficiency of the Modular Neutron Array (MoNA)." W.A. Peters, T. Baumann, G.A. Christian, D.Denby*, P.A. DeYoung, J.E. Finck, C.C. Hall*, J. Hinnefeld, A. Schiller, M.J. Strongman, and M. Thoennessen. Proceedings of the 20th International Conference of the Application of Accelerators in Research and Industry CAARI 2008, AIP Conference Proceedings 1099, 807 (2009).
"Spectroscopy of 12Li." E. Lunderberg*, C. Hall*, P. DeYoung, A. Spyrou, M. Thoennessen, MoNA Collaboration. CEU Poster GB0.00070. Bull. Am. Phys. Soc. 54, (2009). Division of Nuclear Physics Fall Meeting. Waikoloa, Hawaii (2009).
"Production of Nuclei in Neutron Unbound States via Primary Fragmentation of 48Ca", G. Christian, W.A. Peters, D. Absalon*, D. Albertson*, T. Baumann, D. Bazin, E. BreitbachI, J. Brown, P.L. Cole*, D. Denby*, P.A. DeYoung, J.E. Finck, H. Frank, A. Fritsch*, C. Hall*, A.M. Hayes, J. Hinnefeld, C.R. Hoffman, R. Howes, B. Luther, E. Mosby*, S. Mosby*, D. Padilla*, P.V. Pancella, G. Peaslee, W.F. Rogers, A. Schiller, M.J. Strongman, M. Thoennessen, and L.O. Wagner*. Nucl. Phys. A801, 101, (2008).
"Ground Stake Energy and Width of the 7He from 8Li Proton Knockout." D.L. Denby*, P.A. DeYoung, T. Baumann, D. Bazin, E. Breitback*, J. Brown, N. Frank, A. Gade, C.C. Hall*, J. Hinnefeld, C.R. Hoffman, R. Howes, R.A. Jenson*, B. Luther, S.M. Mosby, C.W. Olson*, W.A. Peters, A. Schiller, A. Spyrou, and M. Thoennessen. Phys. Rev. C 78, 044303 (2008).
"Development of an Ion Beam Analysis Method for Forensic Analysis of Glass", Richard Sampson*, Graham F. Peaslee, Paul A. DeYoung, Christopher Hall*, Derek Padilla*, and Patrick Mears*. American Academy of Forensic Sciences 2008 Annual Meeting, Denver, Colorado, (2008).
"Studying the structure of the neutron-unbound 12Li." A. Spyrou, M. Thoennessen, P.A. DeYoung, C.C. Hall*, and the MoNA Collaboration. Paper ED.00006. Bull. Am. Phys. Soc. 53, 65 (2008). Division of Nuclear Physics Fall Meeting. Oakland, CA, October 2008.
"Experimental  Observation of Decay Energy of 12,13Li." C. Hall*, P.A. DeYoung, S. Mosby, A. Spyrou, and M. Thoennessen. CEU Poster DA.00037. Bull. Am. Phys. Soc. 53, 46 (2008). Division of nuclear Physics Fall Meeting. Oakland, CA, October 2008.
"Development of an Ion Beam Analysis Method for Forensic Analysis of Glass."Richard Sampson*, Graham F. Peaslee, Paul A. DeYoung, Christopher Hall*, Derek Padilla*, and Patrick Mears*. American Academy of Forensic Sciences 2008 Annual Meeting, Washington D.C. 2008.
"Breakup of 6He Incident on 209Bi Near the Coulomb Barrier", J.J. Kolate, H. Amro, F.D. Becchetti, J.A. Brown, P.A. DeYoung, M. Hencheck, J.D. Hinnefeld, G.F. Peaslee, A.L. Fritsch, C. Hall*, U. Khadka*, Patrick J. Mears*, P. O'Rourke, D. Padilla*, J. Reith*, Tabatha Spencer, and T. Williams. Phys Rev. C 75, 031302 (2007).


 

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