Calvin R. Howell

Professor of Physics

Office Location: 
221 Dfell, Durham, NC 27708
Front Office Address: 
Box 90308, Durham, NC 27708-0308
Phone: 
(919) 660-2632

Overview

Professor Howell is the Director of the Triangle Universities Nuclear Laboratory (TUNL). His research interests are the quantum chromodynamics (QCD) description of structure and reactions of few-nucleon systems, Big Bang and explosive nucleosynthesis, and applications of nuclear physics in biology, medicine and national security. His research includes: studies of few-nucleon reaction dynamics, measurements of the neutron-neutron scattering length, photodisintegration of the deuteron and beryllium at energies relevant to astrophysics processes, and studies of the carbon and nitrogen accumulation and translocation in plants using short-lived radioactive isotopes and positron emission tomography.

Education & Training

  • Ph.D., Duke University 1984

Trotter, DEG, Meneses, FS, Tornow, W, Howell, CR, Chen, Q, Crowell, AS, Roper, CD, Walter, RL, Schmidt, D, Witała, H, Glöckle, W, Tang, H, Zhou, Z, and Šlaus, I. "Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann." Physical Review C - Nuclear Physics 73.3 (2006). Full Text

Jr, CEF, Bender, JE, Harrawood, B, Sharma, AC, Kapadia, A, Tourassi, GD, Lo, JY, and Howell, C. "Breast cancer diagnosis using neutron stimulated emission computed tomography: Dose and count requirements." Progress in Biomedical Optics and Imaging - Proceedings of SPIE 6142 II (2006). Full Text

Tonchev, AP, Angell, C, Boswell, M, Howell, CR, Karwowski, HJ, Kelley, JH, Tornow, W, and Tsoneva, N. "Low-energy dipole modes of excitation below the neutron separation energy." AIP Conference Proceedings 819 (2006): 350-354. Full Text

MacLachlan, G, Aghalaryan, A, Ahmidouch, A, Anderson, BD, Asaturyan, R, Baker, O, Baldwin, AR, Barkhuff, D, Breuer, H, Carlini, R, Christy, E, Churchwell, S, Cole, L, Crouse, E, Danagoulian, S, Day, D, Eden, T, Elaasar, M, Ent, R, Farkhondeh, M, Fenker, H, Finn, JM, Gan, L, Garrow, K, Gueye, P, Howell, CR, Hu, B, Jones, MK, Kelly, JJ, Keppel, C, Khandaker, M, Kim, W-Y, Kowalski, S, Lai, A, Lung, A, Mack, D, Madey, R, Manley, DM, Markowitz, P, Mitchell, J, Mkrtchyan, H, Opper, AK, and Plaster, B et al. "The ratio of proton electromagnetic form factors via recoil polarimetry at Q2 = 1.13 (GeV/c)2." Nuclear Physics A 764.1-4 (2006): 261-273. Full Text

Sharma, A, Floyd, C, Harrawood, B, Tourassi, G, Kapadia, A, Bender, J, Lo, J, and Howell, C. "Rotating slat collimator design for high-energy near-field imaging." Progress in Biomedical Optics and Imaging - Proceedings of SPIE 6142 I (2006). Full Text

Sabourov, A, Ahmed, MW, Blackston, MA, Crowell, AS, Howell, CR, Joshi, K, Nelson, SO, Perdue, BA, Sabourov, K, Tonchev, A, Weller, HR, Prior, RM, Spraker, MC, Braizinha, B, and Kalantar-Nayestanaki, N. "The Li7(d→,n0)Be8 and Li7(d→,n1)Be8 reactions below 160 keV." Physical Review C - Nuclear Physics 74.6 (2006). Full Text

Plaster, B, Semenov, AY, Aghalaryan, A, Crouse, E, MacLachlan, G, Tajima, S, Tireman, W, Ahmidouch, A, Anderson, BD, Arenhövel, H, Asaturyan, R, Baker, OK, Baldwin, AR, Barkhuff, D, Breuer, H, Carlini, R, Christy, E, Churchwell, S, Cole, L, Danagoulian, S, Day, D, Eden, T, Elaasar, M, Ent, R, Farkhondeh, M, Fenker, H, Finn, JM, Gan, L, Gasparian, A, Garrow, K, Gueye, P, Howell, CR, Hu, B, Jones, MK, Kelly, JJ, Keppel, C, Khandaker, M, Kim, W-Y, Kowalski, S, Lung, A, Mack, D, and Madey, R et al. "Measurements of the neutron electric to magnetic form factor ratio GEn/GMn via the H2(e→,e'n→)H1 reaction to Q2=1.45 (GeV/c)2." Physical Review C - Nuclear Physics 73.2 (2006). Full Text

Tonchev, AP, Boswell, M, Howell, CR, Karwowski, HJ, Kelley, JH, Tornow, W, and Wu, YK. "The high intensity gamma-ray source (HI gamma S) and recent results." NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 241.1-4 (December 2005): 170-175. Full Text

Mitchell, GE, Furman, WI, Lychagin, EV, Muzichka, AY, Nekhaev, GV, Strelkov, AV, Sharapov, EI, Shvetsov, VN, Levakov, BG, Litvin, VI, Lyzhin, AE, Magda, EP, Crawford, BE, Stephenson, SL, Howell, CR, and Tornow, W. "A direct measurement of the neutron-neutron scattering length." BRAZILIAN JOURNAL OF PHYSICS 35.3B (September 2005): 850-853. Full Text

Roper, CD, Tornow, W, Braun, RT, Chen, Q, Crowell, A, Trotter, DG, Howell, CR, Salinas, F, Setze, R, Walter, RL, Chen, Z, Tang, H, and Zhou, Z. "Measurements of Ay(θ) for C12(n,n)C12 from En=2.2 to 8.5 MeV." Physical Review C - Nuclear Physics 72.2 (2005). Full Text

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