Neutron Spectra from Li7(d,n)Be8 and F19(d,n)Ne20 for 1.98-MeV Deuterons

C. H. Johnson and C. C. Trail
Phys. Rev. 133, B1183 – Published 9 March 1964
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Abstract

The neutron spectrum from Li7(d,n)Be8 was studied at 120° with respect to the beam of deuterons incident on a lithium metal target. The average deuteron energy in the target was 1.98 MeV. Up to an excitation of 9 MeV in Be8, only the ground state and the first excited state are observed. The neutron group to the excited state has a peak corresponding to 3.1±0.1-MeV excitation in Be8 and a width of 1.75±0.1 MeV in the center-of-mass system; however, the interpretation of these numbers in terms of the level parameters is obscured by the presence of a continuum from three-body decay. The relative differential cross section for the neutron groups leaving Be8 in the ground state and in the first excited state was measured from 0 to 135° and normalized to an absolute value at 0° measured with a LiF target. The cross section for the production of Be8 in the first excited state has some uncertainty because of the contribution from the competing three-body breakup of the compound system. Cross sections at 0° for F19(d,n)Ne20 are also given for reactions leaving Ne20 in the ground state and first excited state.

  • Received 28 October 1963

DOI:https://doi.org/10.1103/PhysRev.133.B1183

©1964 American Physical Society

Authors & Affiliations

C. H. Johnson and C. C. Trail*

  • Oak Ridge National Laboratory, Oak Ridge, Tennessee

  • *Present address: Argonne National Laboratory, Argonne, Illinois.

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Issue

Vol. 133, Iss. 5B — March 1964

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