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.
Bradford, R., et al. “Differential cross sections for γ+p→K++Y for Λ and Σ0 hyperons.” Physical Review C Nuclear Physics, vol. 73, no. 3, Jan. 2006. Scopus, doi:10.1103/PhysRevC.73.035202. Full Text
Taylor, S., et al. “Radiative decays of the Σ0(1385) and Λ(1520) hyperons.” Physical Review C Nuclear Physics, vol. 71, no. 5, May 2005. Scopus, doi:10.1103/PhysRevC.71.054609. Full Text
Price, J. W., et al. “Exclusive photoproduction of the cascade (Ξ) hyperons.” Physical Review C Nuclear Physics, vol. 71, no. 5, May 2005. Scopus, doi:10.1103/PhysRevC.71.058201. Full Text
Protopopescu, D., et al. “Survey of ALT′ asymmetries in semi-exclusive electron scattering on 4He and 12C.” Nuclear Physics A, vol. 748, no. 3–4, Feb. 2005, pp. 357–73. Scopus, doi:10.1016/j.nuclphysa.2004.11.009. Full Text
Rossi, P., et al. “Onset of asymptotic scaling in deuteron photodisintegration.” Physical Review Letters, vol. 94, no. 1, Jan. 2005, p. 012301. Epmc, doi:10.1103/physrevlett.94.012301. Full Text
Joo, K., et al. “Measurement of the polarized structure function σlT' for pion electroproduction in the Roper-resonance region.” Physical Review C Nuclear Physics, vol. 72, no. 5, Jan. 2005. Scopus, doi:10.1103/PhysRevC.72.058202. Full Text
Savran, D., et al. “Parity assignments in 172,174Yb using polarized photons and the K quantum number in rare earth nuclei.” Physical Review C Nuclear Physics, vol. 71, no. 3, Jan. 2005. Scopus, doi:10.1103/PhysRevC.71.034304. Full Text Open Access Copy
Weller, C. Hadjidakis et al including H. “Exclusive pho-0 Meson Electroproduction from Hydrogen at CLAS.” Physics Letters B, vol. B605, 2005.
Weller, S. Taylor et al including H. “Erratum: Radiative decays of the Sigma-0 (1385) and Lamda (1520) hyperons [PRC 71, 054609 (2005)].” The Physical Review C, vol. 72, 2005.