Rapor 1970-1979 yılları

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Browsing Rapor 1970-1979 yılları by All Authors "Atasoy, H."

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    The gamma-ray spectrum from radiative capture of the first resonance neutrons in 149Sm
    (T.A.E.C., Çekmece Nuclear Research And Training Center, 1975) Cansoy, Ç.; Atasoy, H.; Özbaylı, C.; TAEK-ÇNAEM
    A 37-cc lithium-drifted germanium defector has been used in conjunction with the ÇNAEM neutron crystal sectrometer to examine the gamma-ray spectrum arising from neutron resonance capture in 149Sm. The effective Gamma-ray energy resolution of 0.6-2.4 keV allowed 17 transitions to be examined in the energy range between 109 and 1806 keV following the capture of 0.0976 eV resonance neutrons in 149Sm. The spectrum is intepreted in terms of the levels In the compound nucleus, 150Sm. An analysis of the reduced intensities of 38 El transitions which consist of 9 secondary, and 29 primary transitions indicates that they have a cumulative Porter-Thomas distribution. A similar, analysis has been applied to 15 M1 transitions which consist of 4 secondary and 11 primary, transitions.
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    Total neutron cross section of terbium in the thermal and epithermal energy regions and determination of the potential scattering cross section
    (T.A.E.C., Çekmece Nuclear Research And Training Center, 1978) Cansoy, Ç.; Atasoy, H.; Zebitay, Ş.; TAEK-ÇNAEM
    159Tb'un toplara nötron tesir kesitleri, 0.062 eV'dan 1 eV'a kadar olan enerji aralığında Be(1011) kristal düzlemi monokromatör olarak kullanılarak bir kristal spektrometresinde ölçülmüştür. Deney sonucunda, tek seviyeli Breit-Wigner formülüne en küçük kareler metodu uygulanarak bahis konusu enerji aralığında aşağıdaki rezonans parametreleri tayin edilmiştir; δp = 7,96 ± 1.33 b , A = 5.50 ± 0,86 b X (eV)1/2 .