Direct determination of the doublet and quartet [Formula Presented] cross sections in [Formula Presented]-[Formula Presented] radiative capture at near-thermal energies


Journal Article

Data obtained from studies of the [Formula Presented] and the [Formula Presented] reactions have been used to extract the transition amplitudes corresponding to [Formula Presented] (doublet) and [Formula Presented] (quartet) [Formula Presented] radiative capture. Protons (deuterons) of 40 keV (80 keV) were stopped in [Formula Presented] ice targets. Angular distributions of [Formula Presented], [Formula Presented] [Formula Presented], and [Formula Presented] were fit simultaneously in terms of the four possible [Formula Presented]-wave capture amplitudes and the two [Formula Presented] and [Formula Presented] possible [Formula Presented]-wave capture amplitudes. The results obtained at [Formula Presented] keV indicate that the [Formula Presented] capture cross section is 13.77 [Formula Presented] 0.66 nb, while the [Formula Presented] capture cross section is 6.74 [Formula Presented] 0.44 nb. These results agree with the predictions of a recent three-body theoretical calculation which includes two-body currents [e.g., meson-exchange currents (MEC’s)]. They also agree with the previous experimental determination of the doublet and quartet fusion rates obtained using the Wolfenstein-Gerstein effect to vary the relative population of [Formula Presented] and [Formula Presented] nuclear spins in the [Formula Presented]-[Formula Presented]-[Formula Presented] molecule prior to fusion. © 1997 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Rice, BJ; Wulf, EA; Canon, RS; Kelley, JH; Prior, RM; Spraker, M; Tilley, DR; Weller, HR

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 56 / 6

Start / End Page

  • R2917 - R2919

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.56.R2917

Citation Source

  • Scopus