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Gould, C.R.; Haase, D.G.
North Carolina State Univ., Raleigh (USA)1984
North Carolina State Univ., Raleigh (USA)1984
AbstractAbstract
[en] We have constructed at the Triangle Universities Nuclear Laboratory a cryogenic polarized target facility for the brute force nuclear orientation of bulk metallic samples. The target facility was developed in conjunction with a polarized neutron beam facility at TUNL and is presently being used to study spin-spin effects in total neutron cross sections for polarized neutrons incident on polarized nuclei. The goals of the program have been to demonstrate the feasibility of using present cryogenic technology to produce different polarized targets, and to perform initial measurements of spin-spin cross sections. A 16.2 cm3 sample of 27Al has been cooled to 11.3 mK in a magnetic field of 6.9 T, giving a target polarization of 36%. Preliminary measurements with 46% longitudinally polarized neutrons of energy 14 MeV have yielded a spin-spin cross section of 130 +- 60 mb (< 250 mb to two standard deviations)
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1984; 37 p; Available from NTIS, PC A03/MF A01; 1 as DE85006221
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