Projectile and target excitation in He<sup>+</sup> + He collisions at intermediate energies

Gao Junwen; Hu Zhimin; Wu Yong; Wang Jianguo; Sisourat Nicolas; Dubois Alain

doi:10.1063/5.0025623

Volume 6 Issue 1

Jan. 2021

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Gao Junwen, Hu Zhimin, Wu Yong, Wang Jianguo, Sisourat Nicolas, Dubois Alain. Projectile and target excitation in He+ + He collisions at intermediate energies[J]. Matter and Radiation at Extremes, 2021, 6(1): 014404. doi: 10.1063/5.0025623

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Gao Junwen, Hu Zhimin, Wu Yong, Wang Jianguo, Sisourat Nicolas, Dubois Alain. Projectile and target excitation in He⁺ + He collisions at intermediate energies[J]. Matter and Radiation at Extremes, 2021, 6(1): 014404. doi: 10.1063/5.0025623

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Projectile and target excitation in He⁺ + He collisions at intermediate energies

doi: 10.1063/5.0025623

1.
Laser Fusion Research Center, China Academy of Engineering Physics, 621900 Mianyang, China
2.
Institute of Applied Physics and Computational Mathematics, 100088 Beijing, China
3.
Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, 100871 Beijing, China
4.
Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France

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Corresponding author: a)Author to whom correspondence should be addressed: wu_yong@iapcm.ac.cn
Received Date: 2020-08-31
Accepted Date: 2020-11-09

Available Online: 2021-01-01

Publish Date: 2021-01-15

Abstract

Abstract

We present ab initio calculations of cross sections for projectile and target excitation occurring in the course of He⁺ + He collisions using a three-active-electron semiclassical nonperturbative approach. Intermediate impact energies ranging from 1 keV to 225 keV/u are considered. The results of our calculations agree well with available measurements for both projectile and target excitation in the respective overlapping energy regions. A comparison of our results with those of other theoretical calculations further demonstrates the importance of a nonperturbative approach that includes a sufficient number of channels. Furthermore, it is found that the cross sections for target excitation into singlet states show a valley centered at about 25 keV/u, resulting from competition with electron transfer to singlet projectile states. By contrast, the cross sections for target excitation into triplet states do not exhibit any such structures.

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References

[1]	D. L. Guo, X. Ma, R. T. Zhang, S. F. Zhang, X. L. Zhu, W. T. Feng, Y. Gao, B. Hai, M. Zhang, H. B. Wang, and Z. K. Huang, “State-selective electron capture in 30- and 100-keV He++He collisions,” Phys. Rev. A 95, 012707 (2017).10.1103/physreva.95.012707
[2]	M. S. Schöffler, J. Titze, L. P. H. Schmidt, T. Jahnke, N. Neumann, O. Jagutzki, H. Schmidt-Böcking, R. Dörner, and I. Mančev, “State-selective differential cross sections for single and double electron capture in He+,2+-He and p-He collisions,” Phys. Rev. A 79, 064701 (2009).10.1103/physreva.79.064701
[3]	M. Baxter, T. Kirchner, and E. Engel, “Time-dependent spin-density-functional-theory description of He+-He collisions,” Phys. Rev. A 96, 032708 (2017).10.1103/physreva.96.032708
[4]	J. W. Gao, Y. Wu, J. G. Wang, N. Sisourat, and A. Dubois, “State-selective electron transfer in He+ + He collisions at intermediate energies,” Phys. Rev. A 97, 052709 (2018).10.1103/physreva.97.052709
[5]	I. Mančev, “Four-body continuum-distorted-wave model for charge exchange between hydrogenlike projectiles and atoms,” Phys. Rev. A 75, 052716 (2007).10.1103/physreva.75.052716
[6]	H. Atan, W. Steckelmacher, and M. W. Lucas, “Single electron loss and single electron capture for 0.6-2.2 MeV He+ colliding with rare gases,” J. Phys. B: At., Mol. Opt. Phys. 24, 2559–2569 (1999).10.1088/0953-4075/24/10/012
[7]	R. Hildenbrand, N. Grun, and W. Scheid, “Coupled channel calculations with Cartesian Gaussian basis functions for H + He and He+ + He reactions,” J. Phys. B: At., Mol. Opt. Phys. 28, 4781–4798 (1999).10.1088/0953-4075/28/22/010
[8]	J. L. Forest, J. A. Tanis, S. M. Ferguson, R. R. Haar, K. Lifrieri, and V. L. Plano, “Single and double ionization of helium by intermediate-to-high-velocity He+ projectiles,” Phys. Rev. A 52, 350–356 (1995).10.1103/physreva.52.350
[9]	R. Okasaka, K. Kawabe, S. Kawamoto, M. Tani, H. Kuma, T. Iwai, K. Mita, and A. Iwamae, “Excitation functions of He(n=3) levels in the intermediate-velocity regime of He+-He collisions,” Phys. Rev. A 49, 246–254 (1994).10.1103/physreva.49.246
[10]	R. D. DuBois and S. T. Manson, “Electron emission in He+-atom and He+-molecule collisions: A combined experimental and theoretical study,” Phys. Rev. A 42, 1222–1230 (1990).10.1103/physreva.42.1222
[11]	N. V. de Castro Faria, F. L. Freire, and A. G. de Pinho, “Electron loss and capture by fast helium ions in noble gases,” Phys. Rev. A 37, 280–283 (1988).10.1103/physreva.37.280
[12]	R. Hippler, K.-H. Schartner, and H. F. Beyer, “Direct and charge-exchange excitation of the 21P level in He+-He collisions,” J. Phys. B: At., Mol. Opt. Phys. 11, L337–L341 (1978).10.1088/0022-3700/11/11/001
[13]	R. Hegerberg, T. Stefansson, and M. T. Elford, “Measurement of the symmetric charge-exchange cross section in helium and argon in the impact energy range 1-10 keV,” J. Phys. B: At., Mol. Opt. Phys. 11, 133–147 (1978).10.1088/0022-3700/11/1/017
[14]	E. A. Hinds and R. Novick, “Precise resonant charge-transfer cross sections for He-He+ between 2 eV and 100 eV,” J. Phys. B: At., Mol. Opt. Phys. 11, 2201–2207 (1978).10.1088/0022-3700/11/12/018
[15]	T. G. Winter and C. C. Lin, “Electron capture into excited states of helium by helium-ion impact on helium,” Phys. Rev. A 12, 434–443 (1975).10.1103/physreva.12.434
[16]	V. Pol, W. Kauppila, and J. T. Park, “Absolute differential elastic- and inelastic-scattering cross sections in 25-140 keV He+ + He collisions,” Phys. Rev. A 8, 2990–3000 (1973).10.1103/physreva.8.2990
[17]	M. Barat, D. Dhuicq, R. Francois, R. McCarroll, R. D. Piacentini, and A. Salin, “Inelastic processes in He+-He collisions,” J. Phys. B: At., Mol. Opt. Phys. 5, 1343–1350 (1972).10.1088/0022-3700/5/7/011
[18]	W. N. Shelton and P. A. Stoycheff, “Measurement of the total cross section for single-electron transfer in collisions of He+ with He in the energy range 2-22 keV,” Phys. Rev. A 3, 613–619 (1971).10.1103/physreva.3.613
[19]	L. Wolterbeek Muller and F. J. De Heer, “Electron capture into excited states by helium ions incident of noble gases,” Physica 48, 345–396 (1970).10.1016/0031-8914(70)90244-2
[20]	D. P. Sural, S. C. Mukherjee, and N. C. Sil, “Electron capture and excitation in He+-He collisions,” Phys. Rev. 164, 156–165 (1967).10.1103/physrev.164.156
[21]	C. F. Barnett and P. M. Stier, “Charge exchange cross sections for helium ions in gases,” Phys. Rev. 109, 385–390 (1958).10.1103/physrev.109.385
[22]	W. Lichten, “Resonant charge exchange in atomic collisions,” Phys. Rev. 131, 229–238 (1963).10.1103/physrev.131.229
[23]	E. Möbius, D. Hovestadt, B. Klecker, M. Scholer, G. Gloeckler, and F. M. Ipavich, “Direct observation of He+ pick-up ions of interstellar origin in the solar wind,” Nature 318, 426–429 (1985).10.1038/318426a0
[24]	C. J. Joyce, C. W. Smith, P. A. Isenberg, N. Murphy, and N. A. Schwadron, “Excitation of low-frequency waves in the solar wind by newborn intersteller pickup ions H+ and He+ as seen by voyager at 4.5 AU,” Astrophys. J. 724, 1256–1261 (2010).10.1088/0004-637x/724/2/1256
[25]	P. Swaczyna, D. J. McComas, and E. J. Zirnstein, “He+ ions comoving with the solar wind in the outer heliosphere,” Astrophys. J. 875, 36 (2019).10.3847/1538-4357/ab1081
[26]	R. K. Janev, “Atomic collisions in fusion plasma,” J. Phys. Colloq. 50, C1-421–C1-443 (1989).10.1051/jphyscol:1989150
[27]	A. A. Korotkov and R. K. Janev, “Attenuation of energetic helium beams in fusion plasmas,” Phys. Plasmas 3, 1512–1523 (1996).10.1063/1.872012
[28]	Atomic and Plasma–Material Interaction Data for Fusion, edited by R. E. H. Clark (International Atomic Energy Agency, Vienna, Austria, 2001).
[29]	N. Sisourat, I. Pilskog, and A. Dubois, “Nonperturbative treatment of multielectron processes in ion-molecule scattering: Application to He2+-H2 collisions,” Phys. Rev. A 84, 052722 (2011).10.1103/physreva.84.052722
[30]	J. W. Gao, Y. Wu, N. Sisourat, J. G. Wang, and A. Dubois, “Single- and double-electron transfer in low- and intermediate-energy C4+ + He collisions,” Phys. Rev. A 96, 052703 (2017).10.1103/physreva.96.052703
[31]	J. W. Gao, Y. Wu, J. G. Wang, A. Dubois, and N. Sisourat, “Double electron capture in H+ + H− collisions,” Phys. Rev. Lett. 122, 093402 (2019).10.1103/physrevlett.122.093402
[32]	L. Shampine and M. Gordon, Computer Solution of Ordinary Differential Equations: The Initial Value Problem (Freeman, San Francisco, CA, 1975).
[33]	A. Kramida, Yu. Ralchenko, J. Reader, and NIST ASD Team, NIST Atomic Spectra Database (ver. 5.7.1), available at: https://physics.nist.gov/asd, October 15, 2020, National Institute of Standards and Technology, Gaithersburg, MD, 2019.