Henry R. Weller
Professor Emeritus of Physics
Dr. Weller's research program at TUNL has been concentrated on using radiative capture reactions induced by polarized beams of protons and deuterons to study nuclear systems. These measurements have permitted him to observe the "D-state" in the 4He nucleus, which arises from the two body tensor force. This result changes the rate of the d+d fusion reaction by almost a factor of 50 at very low energies. This is of great interest in nuclear astrophysics. In the past year, he has focused on studies of (d,n) reactions using very low energy polarized beams. Such studies have not been previously performed. These reactions are of great interest in nuclear astrophysics. Dr. Weller is also working to help develop an intense beam of polarized gamma-rays using the facilities of the Duke Free Electron Laser Laboratory. (Dr. Weller is the Nuclear Physics Program Manager and is in charge of the development of the target room for the HIGS Project at DFELL). This beam will ultimately allow new experimental studies capable of testing fundamental aspects of Quantum Chromodynamics in the low-energy sector, such as the up-to-down quark mass ratio. The experiments at HIGS require very sophisticated targets and detector systems. Dr. Weller is leading the development of these. The first experiments using these setups and the upgraded HIGS facility are expected to begin in the spring of 2008.
Pietralla, N., et al. “Parity measurements of nuclear levels using a free-electron-laser generated gamma-ray beam.” Physical Review Letters, vol. 88, no. 1, Jan. 2002, p. 012502. Epmc, doi:10.1103/physrevlett.88.012502. Full Text
Weller, H. R. “Threshold contribution to the Gerasimov-Drell-Hearn sum rule in He-3.” Nuclear Physics A, vol. 684, Mar. 2001, pp. 516C-520C.
Thompson, R., et al. “The ep -->e'p eta reaction at and above the S11(1535) baryon resonance.” Physical Review Letters, vol. 86, no. 9, Feb. 2001, pp. 1702–06. Epmc, doi:10.1103/physrevlett.86.1702. Full Text
Nesaraja, C. D., et al. “Ratio of S factors for (p, γ) reactions on 12C and 13C at astrophysically relevant energies.” Physical Review C Nuclear Physics, vol. 64, no. 6, Jan. 2001, pp. 658041–47. Scopus, doi:10.1103/PhysRevC.64.0658XX. Full Text
Lukashin, K., et al. “Exclusive electroproduction of [Formula Presented] mesons at 4.2 GeV.” Physical Review C Nuclear Physics, vol. 63, no. 6, Jan. 2001, p. 11. Scopus, doi:10.1103/PhysRevC.63.065205. Full Text
Guenther, B. D., et al. “Search for nuclear isotopes for use in a nuclear battery.” Journal of Propulsion and Power, vol. 17, no. 3, Jan. 2001, pp. 540–46. Scopus, doi:10.2514/2.5809. Full Text
Anciant, E., et al. “Photoproduction of φ (1020) mesons on the proton at large momentum transfer.” Physical Review Letters, vol. 85, no. 22, Nov. 2000, pp. 4682–86. Scopus, doi:10.1103/PhysRevLett.85.4682. Full Text
Nelson, S. O., et al. “Evaluations of thermonuclear proton capture reaction rates for 2 H, 7 Li, 9 Be, and 11 B.” Nuclear Physics A, vol. 679, no. 2, Nov. 2000, pp. 199–211. Scopus, doi:10.1016/S0375-9474(00)00341-9. Full Text
Hoefman, M., et al. “Coherent bremsstrahlung in the α + p system at 50 MeV/nucleon.” Physical Review Letters, vol. 85, no. 7, Aug. 2000, pp. 1404–07. Scopus, doi:10.1103/PhysRevLett.85.1404. Full Text
Wulf, E. A., et al. “New photodisintegration threshold observable in 3He.” Physical Review C Nuclear Physics, vol. 61, no. 2, Jan. 2000, pp. 216011–14.