TY - JOUR T1 - PYATOV YÖNTEMİYLE R SÜRECİ ÇEKİRDEKLERDE BETA BOZUNUM HIZLARININ KÜTLE NUMARASINA (A) BAĞLILIĞININ İNCELENMESİ TT - THE STUDY OF THE DEPENDENCE OF THE BETA DECAY RATES IN R-PROCESS NUCLEI ON MASS NUMBER (A) BY PYATOV METHOD AU - Babacan, Tahsin AU - Özaydın, Bünyamin AU - Cınar, Semiha AU - Karabulut, Yüksel AU - Manisa, Kaan AU - Selam, Cevat AU - Yörük, Abdulkadir PY - 2010 DA - August JF - Journal of Science and Technology of Dumlupınar University JO - DPÜFBED PB - Kütahya Dumlupınar Üniversitesi WT - DergiPark SN - 2651-2769 SP - 1 EP - 8 IS - 022 LA - tr AB - Buçalışmada, Pyatov yöntemi kullanılarak R süreci çekirdeklerde beta bozunumhızlarının kütle numarasına olan bağlılığı kuazi parçacık rastgele faz yaklaşımı(QRPA) çerçevesinde incelendi ve öncelikle A=60-90 bölgesinde ve N=50, Z=28yakınlarında yer alan 68-78Ni izotopları için yarı ömür değerlerihesaplandı. Daha sonra bu değerlerin kütle numarasına göre değişimleriincelendi ve mevcut deneysel sonuçlarla karşılaştırıldı. Yukarıda bahsettiğimizbölgeler için elde edilen sonuçlarımızın deneysel değerlerden çok da uzakolmadığı görüldü. Ayrıca, Pyatov yönteminin farklı bölgelerdeki çekirdeklerdeyarı ömür değerlerini açıklamada ne kadar başarılı olduğunu görmek amacıylayukarıda bahsettiğimiz hesaplara ek olarak, N=82, Z=50 bölgesi civarındaki 124-132Cdizotopları için de yarı ömür değerleri hesaplandı ve sonuçlarımız deneyseldeğerlerle karşılaştırıldı. KW - R- süreci KW - beta bozunum hızı KW - Gamow-Teller geçişleri N2 - Inthis study,  the dependence of the betadecay rates in r-process nuclei on mass number has been investigated by usingPyatov Method within the framework of the quasi-particle Random PhaseApprozimation(QRPA). In this respect, first of all, half lives for have beencalculated for 68-78Ni isotopes lying around N=50, Z= 28 region andin the mass region of A=60-90. Then, the variation  of the calculated half lives with respect to massnumber has been investigated and compared with the available experimentalresults.It has been seen that our calculation results obtained for regionsmentioned above  are not so far from theexperimental results.Moreover, in order to see whether Pyatov method issuccessful or not in explaining the half lives of nuclei in different regions,half lives for 124-132Cd isotopes near N=82, Z=50 region have alsobeen calculated in additon to the above calculations, and compared with thecorresponding experimental values.  CR - [1] Y.-Z. Qian and S.E. Woosley, Nucleosynthesis in neutrino-driven winds .1. The physical conditions, Astrophys. J. 471, 331 (1996). CR - [2] G. Martinez-Pinedo and K. Langanke, Shell-model half-lives for N=82 nuclei and their implications for the r process, Phys. Rev. Lett. 83, 4502 (1999). CR - [3] G. Martinez-Pinedo, Weak interaction rates in astrophysics , Nucl. Phys. A668, 357c (2001). CR - [4] A.V. 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