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90 Nb ve 208 Bi Çekirdeklerinde Gamow-Teller 1 + Düzeyleri

Gamow-Teller 1+ States in 90 Nb and 208 Bi Nuclei

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Abstract (2. Language): 
In this study, using Random Phase Approximation (RPA), the energies of Gamow-Teller (GT) 1 + excited states, which are generated in 90 Nb and 208 Bi nuclei by the particle-hole channel of charge-exhange spin-isopin forces, have been investigated. Also, the contribution of Gamow-Teller Resonance (GTR) of β-transition strength to the Ikeda sum rule has been calculated. Our results are compared with the experimental results
Abstract (Original Language): 
Bu çalışmada, Keyfi Faz yaklaşımı (RPA) kullanılarak, yük-alışverişli spin-isospin etkileşmesinin parçacık-deşik kanalının 90 Nb ve 208 Bi çekirdeklerinde yarattığı Gamow-Teller (GT) 1 + uyartılmış düzeylerinin enerjileri incelenmektedir. Ayrıca çalışmada, Gamow-Teller Rezonansının (GTR) β-geçiş gücünün Ikeda toplama kuralına katkısı hesaplanmaktadır. Sonuçlarımız deneysel değerlerle karşılaştırılmaktadır.
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Çizelge 1.
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Zr
ve
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Pb çekirdekleri için çift etkileşimi teorisi parametreleri
A Δp Δn Gp Gn
λ
p
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n
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Çizelge 2.
90
Nb ve 208
Bi çekirdeklerinde 1
+
düzey enerjileri ve B(GT) değerleri
90
Nb 208
Bi
ωi
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6.53 17.67 0.59 7.07 17.65 0.134
7.17 0.25 0.01 12.63 92.46 0.700
8.13 0.82 0.03 13.76 0.51 0.004
18.45 2.27 0.08 14.41 7.64 0.058
19.61 3.90 0.13 19.00 5.08 0.038
22.63 4.34 0.14 23.64 0.18 0.001
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