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R SÜRECİ ÇEKİRDEKLERDE BETA BOZUNUM YARI ÖMÜRLERİNİN NÖTRON SAYISINA(N) BAĞLILIĞININ PYATOV YÖNTEMİYLE İNCELENMESİ

Yıl 2010, Sayı: 022, 33 - 40, 15.08.2010

Öz

Bu
çalışmada, Pyatov yöntemi kullanılarak Kuaziparçacık Rastgele Faz Yaklaşımı
(QRPA) çerçevesinde r-süreci çekirdeklerde beta bozunum yarı ömürlerinin nötron
sayısına bağlılığı incelendi. Bu bağlamda, N=50 bölgesi civarındaki 74-80Zn
izotoplarına ait beta bozunum yarı ömür değerleri hesaplandı. Hesaplanan bu
değerlerin nötron sayısıyla olan değişiminin grafiği çizildi. Elde edilen
sonuçlar, mevcut deneysel değerler ve diğer teorik çalışmalarla karşılaştırıldı.
Hesaplamalarımız, deneysel değerlerden çok uzak olmamasına rağmen, diğer teorik
çalışmalara göre yarı ömür değerlerinin küçük olduğunu göstermektedir. 

Kaynakça

  • [1] E. M. Burbidge, G. R. Burbidge, W. A. Fowler, anda F. Hoyle, Synthesis of the Elements in Stars, Rev. Mod. Phys. 29, 547 (1957).
  • [2] D. D. Clayton, Principles of stellar evolution and nucleosynthesis, (University of Chicago Press, Chicago, 1983).
  • [3]. J.J. Cowan, F.-K. Thielemann, and J.W. Truran, The r-process and nucleochronology, Phys. Rep. 208, 267 (1991).
  • [4]. B. S. Meyer, G. J. Mathews, W. M. Howard, S. E. Woosley, and R. D. Hoffman, R-process nucleosynthesis iın the high-entropy supernova bubble, Astrophys. J. 399, 656 (1992); S. E. Woosley, et al., The r-process and neutrino-heated supernova ejecta, Astrophys. J. 433 (1994) 229.
  • [5]. K.-L. Kratz, J.-P. Bitouzet, F.-K. Thielemann, P. Möller, and B. Pfeiffer, Isotopic r-process abundances and nuclear-structure far from stability - implications for the r-process mechanism, Astrophys. J. 403, 216 (1993)
  • [6]. J. Witti, H.-Th. Janka, and Takahashi K., Nucleosynthesis in neutrino-driven winds from protoneutron stars .1. The alpha-process, Astron. and Astrophys, 286, 841 (1994); 286, 857 (1994).
  • [7]. P. B. Radha, D. J. Dean, S. E. Koonin, K. Langanke, and P.Vogel, Gamow-Teller strength distributions in fp-shell nucle, Phys. Rev. C56, 3079 (1997).
  • [8]. G. Martinez-Pinedo, K. Langanke, and D. J. Dean, Competition of electron capture and beta-decay rates in supernova collapse, nuclth/9811095.
  • [9]. A.B. Migdal, Theory of Finite Fermi Systems and Applications to Atomic Nuclei (Interscience, New York, 1967).
  • [10]. S. Shlomo and G. Bertsch, Nuclear response in continuum, Nucl. Phys. A243, 507 (1975).
  • [11]. P. Möller, and J. Randrup, New developments in the calculation of beta-strength functions, Nucl. Phys. A514, 1 (1990).
  • [12]. H. Homma, E. Bender, M. Hirsch, K. Muto, H. V. Klapdor-Kleingrothaus, and T. Oda, Systematic study of nuclear beta decay, Phys. Rev. C54, 2972 (1996)
  • [13]. A. Staudt, E. Bender, K. Muto and H. V. Klapdor-Kleingrothaus, Second-generation microscopic predictions of beta-decay half-lives of neutron-rich nuclei, At. Data Nucl. Data Tables 44, 79 (1990).
  • [14]. M. Hirsch, A. Staudt, K. Muto, and H. V. Klapdor-Kleingrothaus, Microscopic predictions of beta+/ec-decay half-lives, At. Data Nucl. Data Tables 53, 165 (1993).
  • [15]. J. Zylicz, J. Dobaczewski, Z. Szymanski, Beta Decay of 68–74Ni and Level Structure of Neutron-Rich Cu Isotopes, Proceedings of 2nd International Conference on Exotic Nuclei and Atomic Masses, Bellaire, 1998 (to be published).
  • [16]. I. N. Borzov, S. A. Fayans, and E. L. Trykov, Gamow-Teller strength functions of superfluid odd-a nuclei and neutrino capture reactions, Nucl. Phys. A584, 335 (1995).
  • [17]. I. N. Borzov, S. A. Fayans, and E. Krömer, D. Zawischa, Ground state properties and beta-decay half-lives sn-132 in a self-consistent theory, Z. Phys. A 355, 117 1996.
  • [18]. N.I. Pyatov, D.I. Salamov, Conservation laws and collective excitations in nuclei, Nucleonica 22, 1 (1977).
  • [19]. Soloviev V. G., Theory of Complex nuclei, Pergamon, NewYork USA, 1976.
  • [20]. I.N.Borzov, S. Goriely, and J.M. Pearson, Microscopic calculations of beta-decay characteristics near the A=130 r-process peak, Nucl. Phys. A621, 307c (1997); http://astro.ulb.ac.be/iaa.htm
  • [21]. R.B. Firestone, V. S. Shirley, S.Y.F. Chu, C.M. Baglin, and J. Zipkin, Table of Isotopes(Wiley, New York, 1996).

THE STUDY OF THE DEPENDENCE OF THE BETA DECAY HALF LIVES IN R-PROCESS NUCLEI ON NEUTRON NUMBER (N) BY PYATOV METHOD

Yıl 2010, Sayı: 022, 33 - 40, 15.08.2010

Öz

In
this study, the dependence of the
beta decay half lives in r-process nuclei on neutron  number has been investigated by using Pyatov
Method within the framework of the quasi-particle Random Phase
Approzimation(QRPA).  In this respect,
beta decay half lives for 74-80Zn isotopes near N=50 region have
been calculated. The variation  of these
calculated values with respect to neutron number has been plotted. The
calculated  results have been compared
with the experimental and other theoretical studies. Our calculation results
has shown that although they are not so far from the experimental values,  calculated half life values are stil smaller
compared to other theoretical studies.

Kaynakça

  • [1] E. M. Burbidge, G. R. Burbidge, W. A. Fowler, anda F. Hoyle, Synthesis of the Elements in Stars, Rev. Mod. Phys. 29, 547 (1957).
  • [2] D. D. Clayton, Principles of stellar evolution and nucleosynthesis, (University of Chicago Press, Chicago, 1983).
  • [3]. J.J. Cowan, F.-K. Thielemann, and J.W. Truran, The r-process and nucleochronology, Phys. Rep. 208, 267 (1991).
  • [4]. B. S. Meyer, G. J. Mathews, W. M. Howard, S. E. Woosley, and R. D. Hoffman, R-process nucleosynthesis iın the high-entropy supernova bubble, Astrophys. J. 399, 656 (1992); S. E. Woosley, et al., The r-process and neutrino-heated supernova ejecta, Astrophys. J. 433 (1994) 229.
  • [5]. K.-L. Kratz, J.-P. Bitouzet, F.-K. Thielemann, P. Möller, and B. Pfeiffer, Isotopic r-process abundances and nuclear-structure far from stability - implications for the r-process mechanism, Astrophys. J. 403, 216 (1993)
  • [6]. J. Witti, H.-Th. Janka, and Takahashi K., Nucleosynthesis in neutrino-driven winds from protoneutron stars .1. The alpha-process, Astron. and Astrophys, 286, 841 (1994); 286, 857 (1994).
  • [7]. P. B. Radha, D. J. Dean, S. E. Koonin, K. Langanke, and P.Vogel, Gamow-Teller strength distributions in fp-shell nucle, Phys. Rev. C56, 3079 (1997).
  • [8]. G. Martinez-Pinedo, K. Langanke, and D. J. Dean, Competition of electron capture and beta-decay rates in supernova collapse, nuclth/9811095.
  • [9]. A.B. Migdal, Theory of Finite Fermi Systems and Applications to Atomic Nuclei (Interscience, New York, 1967).
  • [10]. S. Shlomo and G. Bertsch, Nuclear response in continuum, Nucl. Phys. A243, 507 (1975).
  • [11]. P. Möller, and J. Randrup, New developments in the calculation of beta-strength functions, Nucl. Phys. A514, 1 (1990).
  • [12]. H. Homma, E. Bender, M. Hirsch, K. Muto, H. V. Klapdor-Kleingrothaus, and T. Oda, Systematic study of nuclear beta decay, Phys. Rev. C54, 2972 (1996)
  • [13]. A. Staudt, E. Bender, K. Muto and H. V. Klapdor-Kleingrothaus, Second-generation microscopic predictions of beta-decay half-lives of neutron-rich nuclei, At. Data Nucl. Data Tables 44, 79 (1990).
  • [14]. M. Hirsch, A. Staudt, K. Muto, and H. V. Klapdor-Kleingrothaus, Microscopic predictions of beta+/ec-decay half-lives, At. Data Nucl. Data Tables 53, 165 (1993).
  • [15]. J. Zylicz, J. Dobaczewski, Z. Szymanski, Beta Decay of 68–74Ni and Level Structure of Neutron-Rich Cu Isotopes, Proceedings of 2nd International Conference on Exotic Nuclei and Atomic Masses, Bellaire, 1998 (to be published).
  • [16]. I. N. Borzov, S. A. Fayans, and E. L. Trykov, Gamow-Teller strength functions of superfluid odd-a nuclei and neutrino capture reactions, Nucl. Phys. A584, 335 (1995).
  • [17]. I. N. Borzov, S. A. Fayans, and E. Krömer, D. Zawischa, Ground state properties and beta-decay half-lives sn-132 in a self-consistent theory, Z. Phys. A 355, 117 1996.
  • [18]. N.I. Pyatov, D.I. Salamov, Conservation laws and collective excitations in nuclei, Nucleonica 22, 1 (1977).
  • [19]. Soloviev V. G., Theory of Complex nuclei, Pergamon, NewYork USA, 1976.
  • [20]. I.N.Borzov, S. Goriely, and J.M. Pearson, Microscopic calculations of beta-decay characteristics near the A=130 r-process peak, Nucl. Phys. A621, 307c (1997); http://astro.ulb.ac.be/iaa.htm
  • [21]. R.B. Firestone, V. S. Shirley, S.Y.F. Chu, C.M. Baglin, and J. Zipkin, Table of Isotopes(Wiley, New York, 1996).
Toplam 21 adet kaynakça vardır.

Ayrıntılar

Birincil Dil Türkçe
Konular Mühendislik
Bölüm Makaleler
Yazarlar

Tahsin Babacan Bu kişi benim

Kaan Manisa Bu kişi benim

Yüksel Karabulut Bu kişi benim

Cevat Selam Bu kişi benim

Abdülkadir Yörür Bu kişi benim

Yayımlanma Tarihi 15 Ağustos 2010
Yayımlandığı Sayı Yıl 2010 Sayı: 022

Kaynak Göster

APA Babacan, T., Manisa, K., Karabulut, Y., Selam, C., vd. (2010). R SÜRECİ ÇEKİRDEKLERDE BETA BOZUNUM YARI ÖMÜRLERİNİN NÖTRON SAYISINA(N) BAĞLILIĞININ PYATOV YÖNTEMİYLE İNCELENMESİ. Journal of Science and Technology of Dumlupınar University(022), 33-40.

HAZİRAN 2020'den itibaren Journal of Scientific Reports-A adı altında ingilizce olarak yayın hayatına devam edecektir.