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.
WELLER, H. R., et al. “ANGULAR-DISTRIBUTION COEFFICIENTS FOR (GAMMA,CHI) REACTIONS WITH LINEARLY POLARIZED PHOTONS (VOL 50, 1992).” Atomic Data and Nuclear Data Tables, vol. 58, no. 2, Nov. 1994, pp. 317–18.
Weller, H. R., et al. “Angular Distribution Coefficients for (γ,X) Reactions with Circularly Polarized Photons and Polarized Targets and a Correction to Previous Tables.” Atomic Data and Nuclear Data Tables, vol. 58, no. 2, Elsevier BV, Nov. 1994, pp. 219–25. Crossref, doi:10.1006/adnd.1994.1028. Full Text
Williams, J. Z., et al. “Radiative capture of polarized deuterons by 6Li and the D-state of 8Be.” Nuclear Physics, Section A, vol. 577, no. 3–4, Sept. 1994, pp. 653–73. Scopus, doi:10.1016/0375-9474(94)90938-5. Full Text
Godwin, M. A., et al. “Isovector giant quadrupole resonance observed in 89Y(p.” Physical Review. C, Nuclear Physics, vol. 50, no. 3, Sept. 1994, pp. 1528–34. Epmc, doi:10.1103/physrevc.50.1528. Full Text
WELLER, H. R., et al. “OBSERVATION OF SUBSTANTIAL P-WAVE CAPTURE STRENGTH IN THE LI7((P)-],GAMMA)BE-8 REACTION AT E(P)(LAB)=80 KEV AND IMPLICATIONS ON ASTROPHYSICAL S-FACTORS.” Abstracts of Papers of the American Chemical Society, vol. 208, Aug. 1994, pp. 62-NUCL.
Chasteler, R. M., and H. R. Weller. “A portable 17.3 MeV gamma-ray source.” Nuclear Inst. and Methods in Physics Research, A, vol. 344, no. 2, May 1994, pp. 429–31. Scopus, doi:10.1016/0168-9002(94)90093-0. Full Text
Balbes, M. J., et al. “Polarized deuteron capture by 3He and 3H at and above the fusion resonance region.” Physical Review. C, Nuclear Physics, vol. 49, no. 2, Feb. 1994, pp. 912–25. Epmc, doi:10.1103/physrevc.49.912. Full Text
Chasteler, R. M., et al. “Observation of substantial p-wave capture strength in the Li7(p,)8Be reaction for Ep=80-0 keV and implications for astrophysical S factors.” Physical Review Letters, vol. 72, no. 25, Jan. 1994, pp. 3949–52. Scopus, doi:10.1103/PhysRevLett.72.3949. Full Text
Whitton, R. M., et al. “2H(d, gamma )4He polarization observables at 20, 30, and 50 MeV.” Physical Review. C, Nuclear Physics, vol. 48, no. 5, Nov. 1993, pp. 2355–65. Epmc, doi:10.1103/physrevc.48.2355. Full Text