Physics
Scientific paper
May 1954
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1954phrv...94..934r&link_type=abstract
Physical Review, vol. 94, Issue 4, pp. 934-940
Physics
29
Scientific paper
Measurements have been made of the yields and angular distributions of deuterons resulting from the bombardment of B10 by 14-Mev neutrons. The spectrum of charged reaction products was measured by means of a coincidence-telescope spectrometer consisting of two proportional counters and a thin NaI scintillator. The telescope was rotated to obtain measurements at various angles. Deuterons corresponding to the ground state and 2.43-Mev excited state of Be9 were identified by measurements of both their energy and dEdx values. The ground-state angular distribution was found to match the expected Butler inverse-stripping curve for lp=1. The Butler analysis for the excited-state deuterons also gave lp=1, corresponding to odd parity and spin 32, 52, 72, or 92 for the first excited state of Be9. In particular, the spin value 1/2, to be expected from the L-S coupling model, is excluded. The cross sections, integrated from zero to 90 degrees (center of mass), are 21+/-3 and 16+/-2 millibarns, respectively, for the ground- and excited-state reactions.
Ribe F. L.
Seagrave J. D.
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