Rapor

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Browsing Rapor by All Authors "Akyüz, Ö. R."

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    Parameters for the first and second neutron resonance in 149 SM
    (T.A.E.C., Çekmece Nuclear Research Center, 1968-06) Akyüz, Ö. R.; Cansoy, Ç.; Domaniç, F.; Örgeevren, Y.; TAEK-ÇNAEM
    The total neutron cross section of natural samarium has been measured in the energy range from 0,06 to 1 eV with a crystal spectrometer using the Be(1011) and Be(1231) crystal planes as monochromators.In this region two resonances due to 149Sm are present. After correction for second order contamination caused by the monochromator, Doppler corrections have been applied to both resonances. Corrections for spectrometer resolution were needed only for the second resonance. Both resonances were fitted separately to the Breit-Wigner single-level formula by the method of least squares. The analysis gives the parameters of the resonances as follows: E(o) = 0.0973±0.0012 eV, Q(o) - 18348±376 b, r = 0.0635±0.0013 eV,r(n) = (0.0773±0.0025)x10(-3) eV for the first and E(o) = 0.872±0.012 eV, Q(o) = 2948±68 b, r =0.0635±0.0015 eV, r(n) = (0.1114±0.0041)x10 (-3) eV for the second. The statistical weight factor g is taken to be 9/16 for both levels.