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Theoretical and experimental studies on the captured electron population probability of hydrogen-like O and N ions in collision with Al surface

Zhang Bing-Zhang Song Zhang-Yong Zhang Ming-Wu Liu Xuan Qian Cheng Fang Xing Shao Cao-Jie Wang Wei Liu Jun-Liang Zhu Zhi-Chao Sun Liang-Ting Yu De-Yang

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Theoretical and experimental studies on the captured electron population probability of hydrogen-like O and N ions in collision with Al surface

Zhang Bing-Zhang, Song Zhang-Yong, Zhang Ming-Wu, Liu Xuan, Qian Cheng, Fang Xing, Shao Cao-Jie, Wang Wei, Liu Jun-Liang, Zhu Zhi-Chao, Sun Liang-Ting, Yu De-Yang
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  • The study of the interaction between highly charged ions and solid surfaces not only has great significance for basic scientific research such as atomic physics, astrophysics, and high energy density physics but also has promising application prospects in biomedicine, nanotechnology, surface analysis, and microelectronics. In this paper, the intermediate Rydberg states formed during highly charged ${\rm{O}}^{7+}$ and ${\rm{N}}^{6+}$ ions incident on Al surface are studied theoretically by using the two-state vector model. Both the probability of electron capture into different Rydberg states $\left(n_{A}=2-7\right)$ and the most probable neutralization distances are given. The calculation shows that the larger principal quantum number $n_{A}$ is relevant to smaller probability. Therefore, the X-rays emitted by ${\rm{O}}^{7+}$ and ${\rm{N}}^{6+}$ ions incident on the Al surface come mainly from the de-excitation of the smaller $n_{A}$ to the ground state. In order to confirm the calculations, we measured the X-ray emission spectra of ${\rm{O}}^{7+}$ and ${\rm{N}}^{6+}$ ions in collisions with the Al surface in the energy range of 3–20 keV/q. The experiments were performed at an ECR ion source located in Institute of modern physics. We also calculated the transition energies (np–1s) from different high Rydberg states to the ground state by using the FAC code. The center of the measured K X-ray peak is close to the calculated transition energy from the principal quantum number n = 2 to n = 1, it is consistent with our results obtained by the two-state vector model as well. In addition, we found the experimental K X-ray yield for ${\rm{O}}^{7+}$ ions incidence at lower energy collisions is almost the same with ${\rm{N}}^{6+}$ ions, but larger at higher energy collisions. When the ion incident kinetic energy is low, the X-ray emission is mainly owing to the decay of “above the surface” hollow atoms. Because of the small difference in the critical distances for the capture of electrons by ${\rm{O}}^{7+}$ and ${\rm{N}}^{6+}$ to form hollow atoms, the X-ray yields produced in both cases are almost the same at low energy collisions. In contrast, as increasing the incident energy, the ions have a long-range in the target, so the contribution from the decay of “above the surface” and “below the surface” hollow atoms need to be considered at the same time.
      Corresponding author: Song Zhang-Yong, songzhy@impcas.ac.cn ; Zhu Zhi-Chao, 22770662@qq.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11675279, 12075291).
    [1]

    Arnau A, Aumayr F, Echenique P M, Grether M, Heiland W, Limburg J, Morgenstern R, Roncin P, Schippers S, Schuch R, Stolterfoht N, Varga P, Zouros T J M, Winter H 1997 Surf. Sci. Rep. 27 113Google Scholar

    [2]

    Schenkel T, Hamza A V, Barnes A V, Schneider D H 1999 Prog. Surf. Sci. 61 23Google Scholar

    [3]

    Winter H, Aumayr F 1999 J. Phys. B: At. Mol. Opt. Phys. 3 2

    [4]

    Song Z Y, Yang Z H, Xiao G Q, Xu Q M, Chen J, Yang B, Yang Z R 2011 Eur. Phys. J. D 64 197Google Scholar

    [5]

    Zhao Y T, Xiao G Q, Zhang X A, Yang Z H, Zhan W L, Chen X M, Li F L 2006 Nucl. Instrum. Methods Phys. Res., Sect. B 245 72Google Scholar

    [6]

    Zhao Y T, Xiao G Q, Zhang X A, Yang Z H, Zhang Y P, Zhan W L, Chen X M, Li F L 2007 Nucl. Instrum. Methods Phys. Res., Sect. B 258 121Google Scholar

    [7]

    张小安, 梅策香, 张颖, 梁昌慧, 周贤明, 曾利霞, 李耀宗, 柳钰, 向前兰, 孟惠, 王益军 2020 物理学报 69 213301Google Scholar

    Zhang X A, Mei C X, Zhang Y, Liang C H, Zhou X M, Zeng L X, Li Y Z, Liu Y, Xiang Q L, Meng H, Wang Y J 2020 Acta Phys. Sin. 69 213301Google Scholar

    [8]

    Lei Y, Cheng R, Zhou X M, Wang X, Wang Y Y, Ren J R, Zhao Y T, Ma X W, Xiao G Q 2018 Eur. Phys. J. D 72 132Google Scholar

    [9]

    张小安, 李耀宗, 赵永涛, 梁昌慧, 程锐, 周贤明, 王兴, 雷瑜, 孙渊博, 徐戈, 李锦玉, 肖国青 2012 物理学报 61 113401Google Scholar

    Zhang X A, Li Y Z, Zhao Y T, Liang C H, Cheng R, Zhou X M, Wang X, Lei Y, Sun Y B, Xu G, Li J Y, Xiao G Q 2012 Acta Phys. Sin. 61 113401Google Scholar

    [10]

    Zhang H, Chen X, Yang Z, Xu J, Cui Y, Shao J, Zhang X, Zhao Y, Zhang Y, Xiao G 2010 Nucl. Instrum. Methods Phys. Res., Sect. B 268 1564Google Scholar

    [11]

    Nedeljković L D, Nedeljković N N, Božanić D K 2006 Phys. Rev. A 74 032901Google Scholar

    [12]

    Borisov A G, Zimny R, Teillet-Billy D, Gauyacq J P 1996 Phys. Rev. A 53 2457Google Scholar

    [13]

    Burgdörfer J, Lerner P, Meyer F W 1991 Phys. Rev. A 44 5674Google Scholar

    [14]

    Iwai Y, Murakoshi D, Kanai Y, Oyama H, Ando K, Masuda H, Nishio K, Nakao M, Tamamura T, Komaki K, Yamazaki Y 2002 Nucl. Instrum. Methods Phys. Res., Sect. B 193 504Google Scholar

    [15]

    Kanai Y, Nakai Y, Iwai Y, Ikeda T, Hoshino M, Nishio K, Masuda H, Yamazaki Y 2005 Nucl. Instrum. Methods Phys. Res., Sect. B 233 103Google Scholar

    [16]

    Tökési K, Wirtz L, Lemell C, Burgdörfer J 2000 Phys. Rev. A 61 020901Google Scholar

    [17]

    Ninomiya S, Yamazaki Y, Koike F, Masuda H, Azuma T, Komaki K, Kuroki K, Sekiguchi M 1997 Phys. Rev. Lett. 78 4557Google Scholar

    [18]

    Ninomiya S, Yamazaki Y, Azuma T, Komaki K, Koike F, Masuda H, Kuroki K, Sekiguchi M 1997 Phys. Scr. T73 316Google Scholar

    [19]

    Aumayr F, Kurz H, Schneider D, Briere M A, McDonald J W, Cunningham C E, Winter H 1993 Phys. Rev. Lett. 71 1943Google Scholar

    [20]

    Song Z Y, Yang Z H, Zhang H Q, Shao J X, Cui Y, Zhang Y P, Zhang X A, Zhao Y T, Chen X M, Xiao G Q 2015 Phys. Rev. A 91 042707Google Scholar

    [21]

    Nedeljković N N, Majkić M D 2007 Phys. Rev. A 76 042902Google Scholar

    [22]

    Nedeljković N N, Nedeljković L D, Mirković M A 2003 Phys. Rev. A 68 012721Google Scholar

    [23]

    Gillaspy J D, Pomeroy J M, Perrella A C, Grube H 2007 J. Phys. Conf. Ser. 58 451Google Scholar

    [24]

    Tona M, Watanabe H, Takahashi S, Nakamura N, Yoshiyasu N, Sakurai M, Terui T, Mashiko S, Yamada C, Ohtani S 2007 Nucl. Instrum. Methods Phys. Res., Sect. B 256 543Google Scholar

    [25]

    Heller R, Facsko S, Wilhelm R A, Moller W 2008 Phys. Rev. Lett. 101 096102Google Scholar

    [26]

    El-Said A S, Wilhelm R A, Heller R, Facsko S, Lemell C, Wachter G, Burgdorfer J, Ritter R, Aumayr F 2012 Phys. Rev. Lett. 109 117602Google Scholar

    [27]

    Nedeljković N N, Majkić M D, Božanić D K, Dojčilović R J 2016 J. Phys. B: At. Mol. Opt. Phys. 49 125201Google Scholar

    [28]

    Nedeljković N N, Majkić M D, Galijaš S M D 2012 J. Phys. B: At. Mol. Opt. Phys. 45 215202Google Scholar

    [29]

    Kramida A, Ralchenko Y, Reader J, NIST ASD Team 2021 NIST Atomic Spectra Database [EB/OL] https://physics.nist.gov/asd [2021-12-27]

    [30]

    张秉章, 宋张勇, 刘璇, 钱程, 方兴, 邵曹杰, 王伟, 刘俊亮, 徐俊奎, 冯勇, 朱志超, 郭艳玲, 陈林, 孙良亭, 杨治虎, 于得洋 2021 物理学报 70 193201Google Scholar

    Zhang B Z, Song Z Y, Liu X, Qian C, Fang X, Shao C J, Wang W, Liu J L, Xu J K, Feng Y, Zhu Z C, Guo Y L, Chen L, Sun L T, Yang Z H, Yu D Y 2021 Acta Phys. Sin. 70 193201Google Scholar

  • 图 1  $ {\rm{O}}^{7+} $离子俘获电子至里德伯态$v_{{\rm{A}}}(n_{{\rm{A}}}=3 ; \; l_{{\rm{A}}}= $$ 0, 1, 2, 3)$的几率, 其中$l_{{\rm{A}}}=2$$l_{{\rm{A}}}=3$的几率相等. 虚线对应点状核模型

    Figure 1.  Probability for the $ {\rm{O}}^{7+} $ ion capturing an electron into the Rydberg states $\left(n_{{\rm{A}}}=3 ;\; l_{{\rm{A}}}=0, 1, 2, 3\right)$, where the values of $l_{{\rm{A}}}=2$ and $l_{{\rm{A}}}=3$ are equal. Dashed curves correspond to the case of the pointlike core

    图 2  电子被俘获至不同里德堡态$\left(n_{{\rm{A}}} = 2 - 7\right)$的几率 (a) ${\rm{O}} ^{7 + } $离子; (b) $ {\rm{N}}^{6 + } $离子

    Figure 2.  Probability for the electron captured into the Rydberg states $ \left(n_{{\rm{A}}} = 2 - 7\right) $: (a) $ {\rm{O}}^{7 + } $ ion; (b) $ {\rm{N}}^{6 + } $ ion

    图 3  $ {\rm{O}}^{7 + } $离子入射Al表面发射的X射线谱, 其中(a)为3 keV/q, (b) 为20 keV/q. 图中箭头标示了FAC程序计算的不同里德堡态退激到基态的跃迁能

    Figure 3.  X-ray spectra induced by ${\rm{O}} ^{7 + } $ ions impact on aluminum surfaces at (a) 3 keV/q and (b) 20 keV/q collisional energy. The arrows indicate the calculated X-ray energies for different Rydberg states to the ground state by FAC code

    图 4  ${\rm{N}} ^{6 + } $离子入射Al表面发射的X射线谱, 其中(a)为3 keV/q, (b) 为20 keV/q. 图中箭头标示了FAC程序计算的不同里德堡态退激到基态的跃迁能

    Figure 4.  X-ray spectra generated by $ {\rm{N}}^{6 + } $ ions incident on aluminum surfaces at (a) 3 keV/q and (b) 20 keV/q collisional energy. The arrows indicate the calculated X-ray energies for different Rydberg states to the ground state by FAC code

    图 5  3—20 keV/q的${\rm{O}} ^{7 + } $, ${\rm{N}} ^{6 + } $离子入射Al表面的X射线产额

    Figure 5.  X-ray yield by the bombardment of $ {\rm{O}}^{7 + } $ and $ {\rm{N}}^{6 + } $ ions on aluminium surface with 3-20 keV/q incident energies.

    表 1  ${\rm{O}}^{7 + }$, ${\rm{N}}^{6 + }$离子在考虑离子极化下的能级参数$\widetilde{\gamma}_{{\rm{A}}}$ (arb. units), 及不考虑离子极化下的参数$\gamma_{{\rm{A}} 0}= $$ Z / n_{{\rm{A}}}$ (arb. units)

    Table 1.  Energy parameter $\widetilde{\gamma}_{{\rm{A}}}$ (arb. units) and $\gamma_{{\rm{A}} 0} = $$ Z / n_{\rm A}$ (arb. units) for the ions ${\rm{O}}^{7 + }$ and ${\rm{N}}^{6 + }$, separately correspond to the cases with and without polarization of the ionic core

    $n_{{\rm{A}}}$ $l_{{\rm{A}}} = 0$ $l_{{\rm{A}}} = 1$ $l_{{\rm{A}}} = 2$ $l_{{\rm{A}}} = 3$ $\gamma_{{\rm{A}} 0}$
    ${\rm{O} }^{7 + }({{Z} } = 7)$
    2 3.540 3.487 3.500
    3 2.352 2.328 2.334 2.334 2.333
    4 1.760 1.748 1.751 1.751 1.750
    5 1.399 1.400 1.401 1.400
    6 1.166 1.167 1.168 1.167
    7 1.003 1.000
    ${\rm{N} }^{6+}({{Z} }=6)$
    2 3.040 2.987 3.000
    3 2.018 1.994 2.000 2.000
    4 1.510 1.497 1.500 1.500
    5 1.207 1.195 1.200 1.200
    6 0.999 1.000
    7 0.855 0.857
    DownLoad: CSV

    表 2  TVM模型计算的${\rm{O}}^{7 + }$, ${\rm{N}}^{6 + }$离子的中和距离. 括号中的值代表点状核模型的中和距离

    Table 2.  The neutralization distances for the ${\rm{O}}^{7 + }$ and ${\rm{N}}^{6 + }$ ions calculated by TVM. Numbers in parentheses are the neutralization distances for the pointlike ionic core case

    $n_{{\rm{A}}}$ $l_{{\rm{A}}}=0$ $l_{{\rm{A}}}=1$ $l_{{\rm{A}}}=2$ $l_{{\rm{A}}}=3$
    ${\rm{O}}^{7 + }$
    2 1.27 (1.28) 1.28 (1.28) (1.28) (1.28)
    3 2.68 (2.74) 2.75 (2.74) 2.69 (2.74) 2.69 (2.74)
    4 4.60 (4.62) 4.63 (4.62) 4.62 (4.62) 4.62 (4.62)
    5 (7.01) 7.02 (7.01) 7.01 (7.01) 7.01 (7.01)
    6 (9.87) 9.88 (9.87) 9.87 (9.87) 9.81 (9.87)
    7 (13.30) 13.21(13.30) (13.30) (13.30)
    ${\rm{N}}^{6+}$
    2 1.45 (1.51) 1.52 (1.51) (1.51) (1.51)
    3 3.15 (3.18) 3.18 (3.18) 3.18 (3.18) (3.18)
    4 5.36 (5.39) 5.45 (5.39) 5.39 (5.39) (5.39)
    5 8.13 (8.22) 8.25 (8.22) 8.22 (8.22) (8.22)
    6 (11.65) 11.66 (11.65) (11.65) (11.65)
    7 (16.29) 16.37 (16.29) (16.29) (16.29)
    DownLoad: CSV

    表 3  基于FAC程序计算的不同高里德堡态退激到基态的跃迁能(np −1s)

    Table 3.  Calculated transition energy for different Rydberg states to the ground state using FAC code (np −1s)

    O ion $2 {\rm{p}}-1 {\rm{s}}$ $3{\rm{ p}}-1{\rm{ s}}$ $4 {\rm{p}}-1{\rm{ s}}$ $5 {\rm{p}}-1{\rm{ s}}$ $6 {\rm{p}}-1 {\rm{s}}$ $7 {\rm{p}}-1 {\rm{s}}$
    Energy/eV 526.4 541.5 543.5 543.9 544.1 544.2
    N ion $2 {\rm{p}}-1 {\rm{s}}$ $3 {\rm{p}}-1 {\rm{s}}$ $4 {\rm{p}}-1 {\rm{s}}$ $5 {\rm{p}}-1{\rm{ s}}$ $6 {\rm{p}}-1 {\rm{s}}$ $7 {\rm{p}}-1 {\rm{s}}$
    Energy/eV 395.8 407.8 409.7 410.1 410.3 410.4
    DownLoad: CSV
  • [1]

    Arnau A, Aumayr F, Echenique P M, Grether M, Heiland W, Limburg J, Morgenstern R, Roncin P, Schippers S, Schuch R, Stolterfoht N, Varga P, Zouros T J M, Winter H 1997 Surf. Sci. Rep. 27 113Google Scholar

    [2]

    Schenkel T, Hamza A V, Barnes A V, Schneider D H 1999 Prog. Surf. Sci. 61 23Google Scholar

    [3]

    Winter H, Aumayr F 1999 J. Phys. B: At. Mol. Opt. Phys. 3 2

    [4]

    Song Z Y, Yang Z H, Xiao G Q, Xu Q M, Chen J, Yang B, Yang Z R 2011 Eur. Phys. J. D 64 197Google Scholar

    [5]

    Zhao Y T, Xiao G Q, Zhang X A, Yang Z H, Zhan W L, Chen X M, Li F L 2006 Nucl. Instrum. Methods Phys. Res., Sect. B 245 72Google Scholar

    [6]

    Zhao Y T, Xiao G Q, Zhang X A, Yang Z H, Zhang Y P, Zhan W L, Chen X M, Li F L 2007 Nucl. Instrum. Methods Phys. Res., Sect. B 258 121Google Scholar

    [7]

    张小安, 梅策香, 张颖, 梁昌慧, 周贤明, 曾利霞, 李耀宗, 柳钰, 向前兰, 孟惠, 王益军 2020 物理学报 69 213301Google Scholar

    Zhang X A, Mei C X, Zhang Y, Liang C H, Zhou X M, Zeng L X, Li Y Z, Liu Y, Xiang Q L, Meng H, Wang Y J 2020 Acta Phys. Sin. 69 213301Google Scholar

    [8]

    Lei Y, Cheng R, Zhou X M, Wang X, Wang Y Y, Ren J R, Zhao Y T, Ma X W, Xiao G Q 2018 Eur. Phys. J. D 72 132Google Scholar

    [9]

    张小安, 李耀宗, 赵永涛, 梁昌慧, 程锐, 周贤明, 王兴, 雷瑜, 孙渊博, 徐戈, 李锦玉, 肖国青 2012 物理学报 61 113401Google Scholar

    Zhang X A, Li Y Z, Zhao Y T, Liang C H, Cheng R, Zhou X M, Wang X, Lei Y, Sun Y B, Xu G, Li J Y, Xiao G Q 2012 Acta Phys. Sin. 61 113401Google Scholar

    [10]

    Zhang H, Chen X, Yang Z, Xu J, Cui Y, Shao J, Zhang X, Zhao Y, Zhang Y, Xiao G 2010 Nucl. Instrum. Methods Phys. Res., Sect. B 268 1564Google Scholar

    [11]

    Nedeljković L D, Nedeljković N N, Božanić D K 2006 Phys. Rev. A 74 032901Google Scholar

    [12]

    Borisov A G, Zimny R, Teillet-Billy D, Gauyacq J P 1996 Phys. Rev. A 53 2457Google Scholar

    [13]

    Burgdörfer J, Lerner P, Meyer F W 1991 Phys. Rev. A 44 5674Google Scholar

    [14]

    Iwai Y, Murakoshi D, Kanai Y, Oyama H, Ando K, Masuda H, Nishio K, Nakao M, Tamamura T, Komaki K, Yamazaki Y 2002 Nucl. Instrum. Methods Phys. Res., Sect. B 193 504Google Scholar

    [15]

    Kanai Y, Nakai Y, Iwai Y, Ikeda T, Hoshino M, Nishio K, Masuda H, Yamazaki Y 2005 Nucl. Instrum. Methods Phys. Res., Sect. B 233 103Google Scholar

    [16]

    Tökési K, Wirtz L, Lemell C, Burgdörfer J 2000 Phys. Rev. A 61 020901Google Scholar

    [17]

    Ninomiya S, Yamazaki Y, Koike F, Masuda H, Azuma T, Komaki K, Kuroki K, Sekiguchi M 1997 Phys. Rev. Lett. 78 4557Google Scholar

    [18]

    Ninomiya S, Yamazaki Y, Azuma T, Komaki K, Koike F, Masuda H, Kuroki K, Sekiguchi M 1997 Phys. Scr. T73 316Google Scholar

    [19]

    Aumayr F, Kurz H, Schneider D, Briere M A, McDonald J W, Cunningham C E, Winter H 1993 Phys. Rev. Lett. 71 1943Google Scholar

    [20]

    Song Z Y, Yang Z H, Zhang H Q, Shao J X, Cui Y, Zhang Y P, Zhang X A, Zhao Y T, Chen X M, Xiao G Q 2015 Phys. Rev. A 91 042707Google Scholar

    [21]

    Nedeljković N N, Majkić M D 2007 Phys. Rev. A 76 042902Google Scholar

    [22]

    Nedeljković N N, Nedeljković L D, Mirković M A 2003 Phys. Rev. A 68 012721Google Scholar

    [23]

    Gillaspy J D, Pomeroy J M, Perrella A C, Grube H 2007 J. Phys. Conf. Ser. 58 451Google Scholar

    [24]

    Tona M, Watanabe H, Takahashi S, Nakamura N, Yoshiyasu N, Sakurai M, Terui T, Mashiko S, Yamada C, Ohtani S 2007 Nucl. Instrum. Methods Phys. Res., Sect. B 256 543Google Scholar

    [25]

    Heller R, Facsko S, Wilhelm R A, Moller W 2008 Phys. Rev. Lett. 101 096102Google Scholar

    [26]

    El-Said A S, Wilhelm R A, Heller R, Facsko S, Lemell C, Wachter G, Burgdorfer J, Ritter R, Aumayr F 2012 Phys. Rev. Lett. 109 117602Google Scholar

    [27]

    Nedeljković N N, Majkić M D, Božanić D K, Dojčilović R J 2016 J. Phys. B: At. Mol. Opt. Phys. 49 125201Google Scholar

    [28]

    Nedeljković N N, Majkić M D, Galijaš S M D 2012 J. Phys. B: At. Mol. Opt. Phys. 45 215202Google Scholar

    [29]

    Kramida A, Ralchenko Y, Reader J, NIST ASD Team 2021 NIST Atomic Spectra Database [EB/OL] https://physics.nist.gov/asd [2021-12-27]

    [30]

    张秉章, 宋张勇, 刘璇, 钱程, 方兴, 邵曹杰, 王伟, 刘俊亮, 徐俊奎, 冯勇, 朱志超, 郭艳玲, 陈林, 孙良亭, 杨治虎, 于得洋 2021 物理学报 70 193201Google Scholar

    Zhang B Z, Song Z Y, Liu X, Qian C, Fang X, Shao C J, Wang W, Liu J L, Xu J K, Feng Y, Zhu Z C, Guo Y L, Chen L, Sun L T, Yang Z H, Yu D Y 2021 Acta Phys. Sin. 70 193201Google Scholar

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Metrics
  • Abstract views:  3608
  • PDF Downloads:  60
  • Cited By: 0
Publishing process
  • Received Date:  30 December 2021
  • Accepted Date:  10 March 2022
  • Available Online:  20 June 2022
  • Published Online:  05 July 2022

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