A six-body calculation of the alpha-deuteron radiative capture cross section

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The authors have computed the cross section for the process d + alpha -> {sup 6}Li + gamma at the low energies relevant for primordial nucleosynthesis and comparison with laboratory data. The final state is a six-body wave function generated by the variational Monte Carlo method from the Argonne v-18 and Urbana IX potentials, including improved treatment of large-particle-separation behavior. The initial state is built up from the alpha-particle and deuteron ground-state solutions for these potentials, with phenomenological descriptions of scattering and cluster distortions. The dominant E2 cross section is in reasonable agreement with the laboratory data. Including center-of-energy and ... continued below

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462 Kilobytes pages

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Nollett, K. M.; Wiringa, R. B. & Schiavilla, R. September 1, 2000.

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The authors have computed the cross section for the process d + alpha -> {sup 6}Li + gamma at the low energies relevant for primordial nucleosynthesis and comparison with laboratory data. The final state is a six-body wave function generated by the variational Monte Carlo method from the Argonne v-18 and Urbana IX potentials, including improved treatment of large-particle-separation behavior. The initial state is built up from the alpha-particle and deuteron ground-state solutions for these potentials, with phenomenological descriptions of scattering and cluster distortions. The dominant E2 cross section is in reasonable agreement with the laboratory data. Including center-of-energy and other small corrections, the authors obtain an E1 contribution which is larger than the measured contribution at 2 MeV by a factor of three. They calculate explicitly the impulse-approximation M1 contribution, which is expected to be very small, and obtain a result consistent with zero. They find little reason to suspect that the cross section is large enough to produce significant {sup 6}Li in the big bang.

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462 Kilobytes pages

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  • Journal Name: submitted to Phys. Rev. C; Other Information: Submitted to Phys. Review C

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  • Report No.: JLAB-THY-00-24
  • Report No.: DOE/ER/40150-1751
  • Report No.: nucl-th/0006064
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 764808
  • Archival Resource Key: ark:/67531/metadc723492

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  • September 1, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 9:45 p.m.

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Nollett, K. M.; Wiringa, R. B. & Schiavilla, R. A six-body calculation of the alpha-deuteron radiative capture cross section, article, September 1, 2000; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc723492/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.