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Asymmetric and symmetric fission of excited nuclei of $$^{180,190}$$Hg and $$^{184,192,202}$$Pb formed in the reactions with $$^{36}$$Ar and $$^{40,48}$$Ca ions

Bogachev, A. A.*; Kozulin, E. M.*; Knyazheva, G. N.*; Itkis, I. M.*; Itkis, M. G.*; Novikov, K. V.*; Kumar, D.*; Banerjee, T.*; Diatlov, I. N.*; Cheralu, M.*; Kirakosyan, V. V.*; Mukhamejanov, Y. S.*; Pan, A. N.*; Pchelintsev, I. V.*; Tikhomirov, R. S.*; Vorobiev, I. V.*; Maiti, M.*; Prajapat, R.*; Kumar, R.*; Sarkar, G.*; Trzaska, W. H.*; Andreyev, A. N.; Harca, I. M.*; Vardaci, E.*

Bogachev, A. A.*; Kozulin, E. M.*; Knyazheva, G. N.*; Itkis, I. M.*; Itkis, M. G.*; Novikov, K. V.*; Kumar, D.*; Banerjee, T.*; Diatlov, I. N.*; Cheralu, M.*; Kirakosyan, V. V.*; Mukhamejanov, Y. S.*; Pan, A. N.*; Pchelintsev, I. V.*; Tikhomirov, R. S.*; Vorobiev, I. V.*; Maiti, M.*; Prajapat, R.*; Kumar, R.*; Sarkar, G.*; Trzaska, W. H.*; Andreyev, A. N.; Harca, I. M.*; Vardaci, E.*

$$^{180,190}$$Hg及び$$^{184,192,202}$$Pb核の非対称及び対称核分裂モードの研究のため、$$^{36}$$Ar + $$^{144,154}$$Sm,$$^{40}$$Ca + $$^{144}$$Sm反応で生成した$$^{180,190}$$Hg及び$$^{184}$$Pbの質量-エネルギー分布の測定を行った。クーロン障壁エネルギー近傍のエネルギーにおいて、質量-エネルギー分布は二重アーム飛行時間型スペクトロメータCORSETを用いて測定し、以前に測定した$$^{192,202}$$Pb同位体と比較した。結論として、$$^{180,190}$$Hgと$$^{184,192,202}$$Pb核の非対称核分裂の研究特性はZ$$approx$$36では変形した陽子殻の存在を、Z$$approx$$46では変形しない陽子殻の存在を指摘した。

For the purpose of the study of asymmetric and symmetric fission modes of $$^{180,190}$$Hg and $$^{184,192,202}$$Pb nuclei, mass-energy distributions of fission fragments of $$^{180,190}$$Hg and $$^{184}$$Pb formed in the $$^{36}$$Ar + $$^{144,154}$$Sm and $$^{40}$$Ca + $$^{144}$$Sm reactions, respectively, at energies near the Coulomb barrier have been measured using the double-arm time-of-flight spectrometer CORSET and compared with previously measured $$^{192,202}$$Pb isotopes produced in the $$^{48}$$Ca + $$^{144,154}$$Sm reactions. Conclusion is the studied properties of asymmetric fission of $$^{180,190}$$Hg and $$^{184,192,202}$$Pb nuclei point out the existence of well deformed proton shell at Z$$approx$$36 and less deformed proton shell at Z$$approx$$46.

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パーセンタイル:92.98

分野:Physics, Nuclear

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