Z= 122 İzotoplarının Alfa Bozunum Zincirleri ve Kendiliğinden Fisyon Yarı-Ömür Hesapları

Yıl 2020, , 261 - 267, 15.01.2020

Fahrettin Koyuncu , Asım Soylu

https://doi.org/10.17714/gumusfenbil.582583

Öz

Bu çalışmada Z=122
çekirdeğinin izotoplarının alfa bozunum zincirleri incelenmiş ve kendiliğinden fisyon
yarı-ömürleri için hesaplamalar yapılmıştır. Kendiliğinden fisyon yarı-ömür
sürelerini tahmin etmede oldukça yakın bir zaman önce Soylu (2019) tarafından
önerilen yeni eşitlikten faydalanılmıştır. Baskın bozunum modlarını
belirleyebilmek amacıyla aynı izotoplar için alfa bozunum yarılanma süreleri
üzerine hesaplamalarda yapılmıştır. Alfa bozunum hesapları için New RENA ve New
RENB eşitlikleri kullanılmıştır. Böylece kendiliğinden fisyon yapması muhtemel
olan çekirdekler belirlenmeye çalışılmıştır. Elde edilen sonuçlar, henüz
deneysel veri olmadığı için Xu formülünün sonuçlarıyla kıyaslanmıştır ve Soylu
formülü ile elde edilen sonuçların Xu’nun sonuçları ile davranış benzerliği
gösterdiği saptanmıştır. Bu çalışmada kendiliğinden fisyon ve alfa bozunması
için elde edilen yarı ömürler gelecekteki deneysel çalışmalara rehberlik
edebilir. Hesaplamalarda Python 2.7 programla dili Spyder
2.0 ara yüzüyle beraber kullanılmıştır.

Anahtar Kelimeler

Alfa bozunumu, Kendiliğinden fisyon, Yarı-ömür

Destekleyen Kurum

Tübitak

Proje Numarası

118R028

Teşekkür

Bu çalışma 118R028 numaralı TÜBİTAK projesi ile desteklenmiştir.

Alpha Decay Chains and Spontaneous Fission Half-Life Calculations of Z=122 Isotopes

Öz

In this study, alpha decay chains of Z=122 nucleus
isotopes have been investigated and calculations have been done for the
spontaneous fission half-lives.  To
estimate the spontaneous fission half-lives, it has been utilized from very recently proposed new equality by
Soylu (2019). In order to determine the dominant decay modes, calculations on alpha
decay half-lives have been done for the same isotopes. For the alpha decay
calculations New REN A and New REN B equations have been used. Thus, probable
nuclei which are spontaneous fission candidates have been tried to be
determined. The obtained results have been compared with results of Xu formula
since there is no experimental data yet and it was found that the results
obtained with the formula of Soylu showed similar behaviour with the results of
Xu. Obtained half-lives in this study for spontaneous fission and alpha decay
can guide the future experimental studies. In
the calculations Python 2.7 programming language is used with the Spyder 2.0
interface.

Anahtar Kelimeler

Alpha decay, Spontaneous Fission, Half-life

Proje Numarası

118R028

Kaynakça

• Akrawy, D.T., Hassanabadi, H., Qian, Y. ve Santhosh, K.P., 2019. Influence of nuclear isospin and angular momentum on α-decay half-lives. Nuclear Physics A, 983, 310-320.
• Bao, X.J., Guo, S.Q., Zhang, H.F., Xing, Y.Z., Dong, J. M. ve Li, J.Q. 2015. Competition between α-decay and spontaneous fission for superheavy nuclei. Journal of Physics G: Nuclear and Particle Physics, 42(8), 085101.
• Bélier, G., Aupiais, J., Sibbens, G., Moens, A. ve Vanleeuw, D., 2018. High-precision spontaneous fission branching-ratio measurements for 240,242Pu and 252Cf isotopes. Physical Review C, 98(3), 034612.
• Bohr, N. ve Wheeler, J.A., 1939. The mechanism of nuclear fission. Physical Review, 56(5), 426-450.
• Dvorak, J., Brüchle, W., Chelnokov, M., Dressler, R., Düllmann, C.E., Eberhardt, K., ... ve Yeremin, A., (2006). Doubly magic nucleus (108) (270) Hs162. Physical Review Letters, 97(24), 242501.
• Flerov, G.N. ve Petrzhak, K. A. 1940. Spontaneous fission of uranium. Physical Review, 58:(89), 275-279.
• Gregorich, K.E., Gates, J.M., Düllmann, C.E., Sudowe, R., Nelson, S.L., Garcia, M.A., Dragojević, I., Folden, C.M., Neumann, S.H., Hoffman, D.C. ve Nitsche, H. 2006. New isotope 264Sg and decay properties of 262-264Sg. Physical Review C, 74(4), 044611.
• Manjunatha, H.C., 2016a. Theoretical prediction of probable isotopes of superheavy nuclei of Z = 122. International Journal of Modern Physics E, 25(11), 1650100.
• Manjunatha, H.C., 2016b. Comparison of alpha decay with fission for isotopes of superheavy nuclei Z = 124. International Journal of Modern Physics E, 25(09), 1650074.
• Naveya, G., Philominraj, S.I.A. ve Stephen, A., 2018. Study on alpha decay chains of Z = 122 superheavy nuclei with deformation effects and Langer modification. arXiv preprint arXiv:1810.04421.
• Oganessian, Y.T., Utyonkov, V.K., Dmitriev, S.N., Lobanov, Y.V., Itkis, M.G., Polyakov, A.N., ... ve Lougheed, R.W., 2005. Synthesis of elements 115 and 113 in the reaction 243Am+48Ca. Physical Review C, 72(3), 034611.
• Oganessian, Y.T., Utyonkov, V.K., Lobanov, Y.V., Abdullin, F.S., Polyakov, A.N., Sagaidak, R.N., ... ve Lougheed, R.W., 2006. Synthesis of the isotopes of elements 118 and 116 in the 249Cf and 245Cm+ 48 Ca fusion reactions. Physical Review C, 74(4), 044602.
• Pahlavani, M.R. ve Joharifard, M., 2018. Isotopic yield and half-lives for the spontaneous fission of 280Ds and 282Cn, superheavy nuclei. The European Physical Journal A, 54(10), 171.
• Pahlavani, M.R. ve Joharifard, M., 2019. Isotopic yield and half-life of spontaneous fission for 284Cn and 284Fl superheavy isobars using direct calculation and semiempirical formulas. Physical Review C, 99(4), 044601.
• Peterson, D., Back, B.B., Janssens, R.V.F., Khoo, T.L., Lister, C.J., Seweryniak, D., ... ve Tandel, U.S., 2006. Decay modes of 250No. Physical Review C, 74(1), 014316.
• Poenaru, D.N., Gherghescu, R.A., ve Greiner, W., 2011. Single universal curve for cluster radioactivities and α decay. Physical Review C, 83(1), 014601.
• Qi, C., Xu, F.R., Liotta, R.J. ve Wyss, R. 2009. Universal decay law in charged-article emission and exotic cluster radioactivity. Physical Review Letters, 103(7), 072501.
• Ren, Z. ve Xu, C., 2005. Spontaneous fission half-lives of heavy nuclei in ground state and in isomeric state. Nuclear Physics A, 759(1-2), 64-78.
• Santhosh, K.P., Biju, R.K. ve Sahadevan, S., 2010. Semi-empirical formula for spontaneous fission half life time. Nuclear Physics A, 832(3-4), 220-232.
• Santhosh, K.P., ve Nithya, C., 2016a. Predictions on the alpha decay chains of superheavy nuclei with Z = 121 within the range 290≤ A≤ 339. International Journal of Modern Physics E, 25(10), 1650079.
• Santhosh, K.P., ve Nithya, C., 2016b. Theoretical studies on the modes of decay of superheavy nuclei. Physical Review C, 94(5), 054621.
• Santhosh, K.P. ve Priyanka, B., 2014. Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei. Nuclear Physics A, 929, 20-37.
• Soylu, A. 2019. Search for decay modes of heavy and superheavy nuclei. Chinese Physics C, 43(7), 074102.
• Swiatecki, W.J., 1955. Systematics of spontaneous fission half-lives. Physical Review, 100(3), 937.
• Viola Jr, V.E. ve Seaborg, G.T. 1966. Nuclear systematics of the heavy elements-II Lifetimes for alpha, beta and spontaneous fission decay. Journal of Inorganic and Nuclear Chemistry, 28(3), 741-761.
• Xu, C. ve Ren, Z., 2005. Systematical law of spontaneous fission half-lives of heavy nuclei. Physical Review C, 71(1), 014309.
• Xu, C., Ren, Z. ve Guo, Y. 2008. Competition between α decay and spontaneous fission for heavy and superheavy nuclei. Physical Review C, 78(4), 044329.