Signatures of shell evolution in alpha decay across the N=126 shell closure

  • Within the alpha-cluster model, we particularly investigate the alpha decay of exotic nuclei in the vicinity of the N=126 neutron shell plus the Z=82 proton shell. The systematics of alpha-preformation probability (Pα), as an indicator of the shell effect, is deduced from the ratio of the experimental decay width to the calculated one. Through the comparative analysis of the Pα trend in the N=124-130 isotonic chain, the N=126 and Z=82 shell closures are believed to strongly affect the formation of the alpha particle before its penetration. Additionally, the Pα variety in Po and Rn isotopes is presented as another proof for such an influence. More importantly, it may be concluded that the expected neutron (or proton) shell effect gradually fades away along with the increasing valence proton (or neutron) number. The odd-even staggering presented in the Pα value is also discussed.
      PCAS:
  • 加载中
  • [1] M. Pftzner, M. Karny, L. V. Grigorenko, and K. Riisager, Rev. Mod. Phys., 84: 567 (2012)
    [2] R. G. Lovas, R. J. Liotta, A. Insolia, K. Varga, and D. S. Delion, Phys. Rep., 294: 265 (1998)
    [3] Yu Ts Oganessian and V K Utyonkov, Rep. Prog. Phys., 78: 036301 (2015)
    [4] S. Hofmann, J. Phys. G: Nucl. Part. Phys., 42: 114001 (2015)
    [5] J. Wauters, N. Bijnens, P. Dendooven, M. Huyse, H. Hwang, G. Reusen, J. von Schwarzenberg, P. Van Duppen, R. Kirchner, and E. Roeckl, Phys. Rev. Lett., 72: 1329 (1994)
    [6] A. N. Andreyev, M. Huyse, P. Van Duppen et al, Phys. Rev. Lett., 110: 242502 (2013)
    [7] J. Khuyagbaatar, A. Yakushev, Ch. E. Dllmann et al, Phys. Rev. Lett., 115: 242502 (2015)
    [8] G. Gamow, Z. Phys., 51: 204 (1928)
    [9] R. W. Gurney and E. U. Condon, Nature (London), 122: 439 (1928)
    [10] H. J. Mang, Annu. Rev. Nucl. Sci., 14: 1 (1964)
    [11] J. O. Rasmussen, Phys. Rev., 113: 1593 (1959)
    [12] C. Qi, A. N. Andreyev, M. Huyse, R. J. Liotta, P. Van Duppen, and R. Wyss, Phys. Lett. B, 734: 203-206 (2014)
    [13] Chang Xu and Zhongzhou Ren, High Energy Physics and Nuclear Physics, 28: 502-506 (2004) (in Chinese)
    [14] D. S. Delion, Phys. Rev. C, 80: 024310 (2009)
    [15] G. L. Zhang, X. Y. Le, and H. Q. Zhang, Phys. Rev. C, 80: 064325 (2009)
    [16] H. F. Zhang and G. Royer, Phys. Rev. C, 77: 054318 (2008)
    [17] H. F. Zhang, G. Royer, Y. J. Wang, J. M. Dong, W. Zuo, and J. Q. Li, Phys. Rev. C, 80: 057301 (2009)
    [18] Dongdong Ni and Zhongzhou Ren, Phys. Rev. C, 80: 014314 (2009)
    [19] M. Ismail, A. Y. Ellithi, M. M. Botros, and A. Adel, Phys. Rev. C, 81: 024602 (2010)
    [20] W. M. Seif, J. Phys. G: Nucl. Part. Phys., 40: 105102 (2013)
    [21] Yibin Qian and Zhongzhou Ren, Nucl. Phys. A, 852: 82-91 (2011)
    [22] Daming Deng and Zhongzhou Ren, Phys. Rev. C, 93: 044326 (2016)
    [23] Yibin Qian and Zhongzhou Ren, Sci. China: Phys. Mech. Astron, 56: 1520 (2013)
    [24] B. Buck, A. C. Merchant, and S. M. Perez, At. Data Nucl. Data Tables, 54: 53 (1993)
    [25] K. Wildermuth and Y. C. Tang, A Unified Theory of the Nucleus (New York: Academic Press, 1997)
    [26] A. Bohr and B. R. Mottelson, Nuclear Structure (Singapore: World Scientific, 1998)
    [27] Chang Xu and Zhongzhou Ren, Nucl. Phys. A, 753: 174-185 (2005)
    [28] M. Wang, G. Audi, A. H. Wapstra, F. G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chin. Phys. C, 36: 1603-2014 (2012); G. Audi, F. G. Kondev, M. Wang, B. Pfeiffer, X. Sun, J. Blachot, and M. MacCormick, Chin. Phys. C, 36: 1157-1286 (2012)
    [29] Shu-Wei Xu, Guo-Hua Wu, Rong-Zhi Miao, and Fei Han, High Energy Physics and Nuclear Physics, 7: 95-100 (1983) (in Chinese)
  • 加载中

Get Citation
Rui-Wang, Rui-Yao Wang, Yi-Bin Qian and Zhong-Zhou Ren. Signatures of shell evolution in alpha decay across the N=126 shell closure[J]. Chinese Physics C, 2017, 41(6): 064103. doi: 10.1088/1674-1137/41/6/064103
Rui-Wang, Rui-Yao Wang, Yi-Bin Qian and Zhong-Zhou Ren. Signatures of shell evolution in alpha decay across the N=126 shell closure[J]. Chinese Physics C, 2017, 41(6): 064103.  doi: 10.1088/1674-1137/41/6/064103 shu
Milestone
Received: 2017-01-25
Revised: 2017-02-22
Fund

    Supported by National Natural Science Foundation of China (11375086, 11535004, 11605089, 11120101005), Natural Science Youth Fund of Jiangsu Province (BK20150762), Fundamental Research Funds for the Central Universities (30916011339), 973 National Major State Basic Research and Development Program of China (2013CB834400), and a Project Funded by the Priority Academic Programme Development of JiangSu Higher Education Institutions (PAPD)}

Article Metric

Article Views(1290)
PDF Downloads(56)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Signatures of shell evolution in alpha decay across the N=126 shell closure

    Corresponding author: Yi-Bin Qian,
    Corresponding author: Zhong-Zhou Ren,
  • 1.  Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2. Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
  • 3. Key Laboratory of Modern Acoustics and Department of Physics, Nanjing University, Nanjing 210093, China
  • 4. Key Laboratory of Modern Acoustics and Department of Physics, Nanjing University, Nanjing 210093, China
  • 5. Kavli Institute for Theoretical Physics China, Beijing 100190, China
  • 6. Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000, China
Fund Project:  Supported by National Natural Science Foundation of China (11375086, 11535004, 11605089, 11120101005), Natural Science Youth Fund of Jiangsu Province (BK20150762), Fundamental Research Funds for the Central Universities (30916011339), 973 National Major State Basic Research and Development Program of China (2013CB834400), and a Project Funded by the Priority Academic Programme Development of JiangSu Higher Education Institutions (PAPD)}

Abstract: Within the alpha-cluster model, we particularly investigate the alpha decay of exotic nuclei in the vicinity of the N=126 neutron shell plus the Z=82 proton shell. The systematics of alpha-preformation probability (Pα), as an indicator of the shell effect, is deduced from the ratio of the experimental decay width to the calculated one. Through the comparative analysis of the Pα trend in the N=124-130 isotonic chain, the N=126 and Z=82 shell closures are believed to strongly affect the formation of the alpha particle before its penetration. Additionally, the Pα variety in Po and Rn isotopes is presented as another proof for such an influence. More importantly, it may be concluded that the expected neutron (or proton) shell effect gradually fades away along with the increasing valence proton (or neutron) number. The odd-even staggering presented in the Pα value is also discussed.

    HTML

Reference (29)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return