Calvin R Howell, Professor and Director, TUNL  

Calvin R Howell

Office Location: 414 TUNL
Office Phone: 919-660-2632
Email Address: howell@tunl.duke.edu
Web Page: http://www.tunl.duke.edu/Directory/Faculty/howell/

Specialties:
Experimental nuclear physics

Education:
Doctor of Philosophy, Duke University, 1984
Master of Art, Duke University, 1980
Bachelor of Science, Davidson College, 1978

Research Categories: Experimental Nuclear Physics

Current projects: Study of the Star Anomaly in neutron-deuteron breakup, Measurement of the neutron-neutron scattering length, Carbon and nitrogen translocation in plants, Element imaging in materials, Explosive nucleosynthesis

Research Description:

Professor Howell is the Director of the Triangle Universities Nuclear Laboratory (TUNL). His research interests are the quantum chromodynamics (QCD) description of nucleons and few-nucleon interactions, Big Bang and explosive nucleosynthesis, and applications of nuclear physics in biology, medicine and national security. His current research projects include: the studies of few-nucleon reaction dynamics, direct and indirect measurements of the neutron-neutron scattering length, photodisintegration of the deuteron and beryllium at energies relevant to astrophysics processes, investigations of the carbon and nitrogen translocation in plants using short-lived radioactive isotopes and positron emission tomography, and development of neutron stimulated emission tomography techniques for non-intrusive analysis of materials.

Areas of Interest:
experimental nuclear physics
few-nucleon reactions
nuclear astrophysics
carbon translocation in plants
material analysis and imaging with neutrons

Recent Publications   (More Publications)

  1. A. Hutcheson, C.T. Angell, J.A. Becker, M. Boswell, A.S. Crowell, D. Dashdorj, B. Fallin, N. Fotiades, C.R. Howell, H.J. Karwowski, J.H. Kelley, M. Kiser, R.A. Macri, R.O. Nelson, R.S. Pedroni, A.P. Tonchev, W. Tornow, D.J. Vieira, G.J. Weisel, and J.B. Wilhelmy, Pulsed and Monoenergetic Beams for Neutron Cross-Section Measurements Using Activation and Scattering Techniques at Triangle Universities Nuclear Laboratory, Nucl. Instrum. Methods Phys. B, vol. 261 (2007), pp. 369 .
  2. C.E. Floyd, A.C. Sharma, J.E. Bender, A.J. Kapadia, J.Q. Xia, B.P. Harrawood, G.D. Tourassi, J.Y. Lo, M.R. Kiser, A.S. Crowell, R.D. Pedroni, R.A. Macri, S. Tajima and C.R. Howell, Neutron Stimulated Emission Computed Tomography: Background Corrections, Nucl. Instrum. Methods Phys. B, vol. 254 (2007), pp. 329 .
  3. B. Plaster et al., (including S. Tajima, S. Churchwell and C.R. Howell), Measurement of the neutron electric to magnetic form factor ratio GEn/GMn via the reaction to Q2=1.45 (GeV/c)2, Phys. Rev. C, vol. 73 (2006), pp. 025205 .
  4. A. Sabourov, M.W. Ahmed, M.A. Blackston, A.S. Crowell, C.R. Howell, B.A. Perdue, K. Sabourov, A. Tonchev, H.R. Weller, R.M. Prior and M.C. Spraker, Astrophysical S factor for the 7Li(d,n0)8Be and 7Li(d,n1)8Be reactions, Phys. Rev. C, vol. 73 (2006), pp. 015801 .
  5. D.E. Gonzalez Trotter, F. Salinas Meneses, W. Tornow, C.R. Howell, Q. Chen, A.S. Crowell, C.D. Roper, R.L. Walter, D. Schmidt, H. Witała, W. Glöckle, H. Tang, Z. Zhou and I. Šlaus, Neutron-deuteron breakup experiment at En=13 MeV: Determination of the 1S0 neutron-neutron scattering length ann, Phys. Rev. C, vol. 73 (2006), pp. 034001 .

Curriculum Vitae

Current Ph.D. Students   (Former Students)

  • Matthew R. Kiser  
Postdocs Mentored

  • Robert A. Macri (March 01, 2004 - September 30, 2004)  
  • Shigeyuki Tajima (January 1, 2004 - August 31, 2004)  
  • Alexander S. Crowell (January 1, 2002 - present)  
  • Steve Churchwell (1998/01-2001/08)