Competition between α-decay and β-decay for heavy andsuperheavy nuclei

  • In this work, the β-stable region for Z≥90 is proposed based on a successful binding energy formula. The calculated β-stable nuclei in the β-stable region are in good agreement with the ones obtained by Möller et al. The half-lives of the nuclei close to the β-stable region are calculated and the competition between α-decay and β-decay is systematically investigated. The calculated half-lives and the suggested decay modes are well in line with the experimental results. The decay modes are mostly β--decay above the β-stable region. Especially for Z≤111, all the decay modes are β--decay. Regarding the nuclei above the β-stable region, α-decay and β--decay (α-) can occur simultaneously when Z≥112. This is a very interesting phenomenon. The competition between α-decay and β-decay is very complex and drastic below the β-stable region. The predictions for half-lives and decay modes of the nuclei with Z=107-110 are presented in detail.
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  • [1] ZHENG S J, XU F R, YUAN C X, QI C. Chin. Phys. C (HEP NP), 2009, 33: 107[2] ZHAO W J, ZHANG Y Q, WANG H L et al. Chin. Phys. C (HEP NP), 2010, 34: 1609[3] XU H S, ZHOU X H, XIAO G Q et al. Nucl. Phys. Rev., 2003, 20: 76[4] ZHANG H F, ZUO W, REN X Z, ZHOU X H, LI J Q. Nucl. Phys. Rev., 2004, 21: 203[5] ZUO W, LI J Q, ZHAO E G. Nucl. Phys. Rev., 2006, 23: 375[6] HUANG W X, WANG Y, ZHU Z C et al. Nucl. Phys. Rev., 2006, 23: 383[7] Hofmann S, Münzenberg G. Rev. Mod. Phys., 2000, 72: 733[8] Koonin S E. Nature, 1991, 354: 468[9] Haxton W C, Johnson C. Phys. Rev. Lett., 1990, 65: 1325[10] Wilk P A, Gregorich K E, Türler A et al. Phys. Rev. Lett., 2000, 85: 2697[11] REN Z Z, XU G O. Phys. Rev. C, 1987, 36: 456[12] ZHANG X P, REN Z Z. Phys. Rev. C, 2006, 73: 014305[13] XU C, REN Z Z. Phys. Rev. C, 2006, 73: 041301(R)[14] REN Y J, REN Z Z. Phys. Rev. C, 2012, 85: 044608[15] PENG J S, LI L L, ZHOU S G, ZHAO E G. Chin. Phys. C (HEP NP), 2008, 32: 634[16] DONG J M, ZHANG H F, WANG Y Z et al. Chin. Phys. C (HEP NP), 2009, 33: 633[17] ZHANG G L, LE X Y. Chin. Phys. C (HEP NP), 2009, 33: 354[18] SU X L, ZHANG H F, ZUO W, LI J Q. Nucl. Phys. Rev., 2009, 26: 177[19] XU C, REN Z Z. Nucl. Phys. Rev., 2013, 30: 308[20] BAO X J, ZHANG H F, LI J Q, ZHANG H F. Nucl. Phys. Rev., 2013, 30: 318[21] DONG T K, REN Z Z. Phys. Rev. C, 2008, 77: 064310[22] Mller P, Nix J R, Kratz K -L. At. Data Nucl. Data Tables, 1997, 66: 131[23] NI D D, REN Z Z, DONG T K et al. Phys. Rev. C, 2008, 78: 044310[24] ZHANG X P, REN Z Z, ZHI Q J et al. J Phys. G: Nucl. Part. Phys., 2007, 34: 2611[25] ZHANG X P, REN Z Z, ZHI Q J. Commun. Theor. Phys., 2007, 48: 1072[26] Audi G, Kondev F G, Wang M et al. Chin. Phys. C (HEP NP), 2012, 36: 1157[27] WANG M, Audi G, Wapstra A H et al. Chin. Phys. C (HEP NP), 2012, 36: 1603[28] GAN Z G, GUO J S, WU X L et al. Eur. Phys. J. A, 2004, 20: 385[29] Oganessian Yu Ts. J Phys. G: Nucl. Part. Phys., 2007, 34: R165[30] Oganessian Yu Ts, Dmitriev S N, Yeremin A V et al. Phys. Rev. C, 2009, 79: 024608[31] Düllmann Ch E et al. Nature, 2002, 418: 859[32] Gupta M, Burrows T W. Nucl. Data Sheets, 2005, 106: 251[33] Dragojeviċ I, Gregorich K E, Düllmann Ch E et al. Phys. Rev. C, 2009, 79: 011602(R)[34] PEI J C, XU F R, LIN Z J et al. Phys. Rev. C, 2007, 76: 044326[35] Dvorak J, Brüchle W, Chelnokov M et al. Phys. Rev. Lett., 2008, 100: 132503[36] ZHANG H F, ZUO W, LI J Q et al. Phys. Rev. C, 2006, 74: 017304[37] Morita K, Morimoto K, Kaji D et al. J Phys. Soc. Jpn., 2004, 73: 1738
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HENG Zong-Qiang, SHU Liang-Ping, MENG Ying, HU Ji-Gang and QIAN Jian-Fa. Competition between α-decay and β-decay for heavy andsuperheavy nuclei[J]. Chinese Physics C, 2014, 38(12): 124101. doi: 10.1088/1674-1137/38/12/124101
HENG Zong-Qiang, SHU Liang-Ping, MENG Ying, HU Ji-Gang and QIAN Jian-Fa. Competition between α-decay and β-decay for heavy andsuperheavy nuclei[J]. Chinese Physics C, 2014, 38(12): 124101.  doi: 10.1088/1674-1137/38/12/124101 shu
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Received: 2014-01-15
Revised: 1900-01-01
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Competition between α-decay and β-decay for heavy andsuperheavy nuclei

    Corresponding author: HENG Zong-Qiang,

Abstract: In this work, the β-stable region for Z≥90 is proposed based on a successful binding energy formula. The calculated β-stable nuclei in the β-stable region are in good agreement with the ones obtained by Möller et al. The half-lives of the nuclei close to the β-stable region are calculated and the competition between α-decay and β-decay is systematically investigated. The calculated half-lives and the suggested decay modes are well in line with the experimental results. The decay modes are mostly β--decay above the β-stable region. Especially for Z≤111, all the decay modes are β--decay. Regarding the nuclei above the β-stable region, α-decay and β--decay (α-) can occur simultaneously when Z≥112. This is a very interesting phenomenon. The competition between α-decay and β-decay is very complex and drastic below the β-stable region. The predictions for half-lives and decay modes of the nuclei with Z=107-110 are presented in detail.

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