[en] Some few body capture reaction studies at low energies are reviewed. The emphasis is on the use of polarized beams. New calculations of n+d and p+d capture had just recently been completed by the Los Alamos group (Friar, Gibson, and Payne). Their results are in good agreement with existing data, and emphasize the importance of meson exchange current effects in these processes at thermal energies. The effects of M1 radiation can be seen in the vector analyzing power of the p+d radiative capture reaction from its interference with E1 radiation. The vector analyzing powers of the rvec p+T → ⁴He + γ reaction can be used to search for M1 radiation in ⁴He. Low energy data show a substantial b₁ coefficient which can only be accounted for with a substantial M1 contribution. The author is also working on studying the rvec d+T and rvec d+³He capture reactions in the region of the fusion resonance. His (published) rvec d+T capture data indicate that the reaction goes via ∼95% S = 3/2, E1 capture with small S = 1/2, E1 and small M1 admixtures. In the course of obtaining the d+T and d+³He data, he realized that he could use his spectra to obtain the ground state widths of ⁵He and ⁵Li. Finally, he will discuss the d+d reaction at very low energies. The simplest picture of this reaction dominated by S wave capture to the D-state below 1 MeV

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[en] This talk is intended to describe some new applications of polarized beams in the field of radiative capture reactions. In particular, I will discuss the recent work in which the D-state component in the ground states of ³He and ⁴He is being studied by means of the capture of tensor polarized deuterons on targets of hydrogen and deuterium, respectively. I will also discuss the j-dependence which has been observed in the capture of polarized nucleons on a variety of targets, and try to show that analyzing power measurements appear to be useful for making j-assignments to single particle final states. (author)

[en] A description is presented of the detector system used at the Triangle Universities Nuclear Laboratory (TUNL) including calibration and operating characteristics. Three examples of the use of the detector system are given. 14 refs

[en] The ⁶Li(p,γ)⁷Be reaction has been studied using polarized protons with a lab energy of 80keV. The protons were stopped in the 99% ⁶Li target. Polarized beam currents of about 30 microamperes and polarizations of about 0.7 were used with the beam polarization being flipped at a rate of 10Hz. The gamma rays were detected by a large HPGe detector and a BGO detector. Analyzing powers and cross sections were measured for gamma rays to the ground and first excited states of ⁷Be at 0, 45 degrees, and 90 degrees. Preliminary results indicate a much smaller analyzing power than previously observed for the ⁷Li(p,γ)⁸Be reaction at 80 keV. The measurements will be compared to direct capture model calculations, and the results will be used to extract an astrophysical S-factor for this reaction

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[en] It is argued that Haeberli's analysis does not rule out a resonance interpretation