Scaling for state-selective charge exchange due to collisions of multicharged ions with hydrogen

State-resolved charge exchange (CX) cross sections for Be4+, C6+, N7+ and O8+ projectiles colliding with atomic hydrogen are evaluated employing two different methods: the Classical Trajectory Monte Carlo (CTMC) and the eikonal impulse (EI) approximations. These cross sections are used to extend previously derived scaling laws for n−, nl−, and nlm− distributions to highly excited final levels with 4 ≤ n ≤ 9, covering energies in the range 50-2000 keV/amu. Present results are in agreement with available experimental and theoretical data for these collision systems, becoming a useful instrument for plasma research.

[1]  C. Illescas,et al.  Calculation of ionization and total and partial charge exchange cross sections for collisions of C6+ and N7+ with H , 2014 .

[2]  Daniel M. Thomas.  Beams, brightness, and background: Using active spectroscopy techniques for precision measurements in fusion plasma researcha) , 2012 .

[3]  Nancy S. Brickhouse,et al.  Approximating the X-ray spectrum emitted from astrophysical charge exchange , 2012 .

[4]  J. Schweinzer,et al.  Charge exchange and ionization in N7 +–, N6 +–, C6 +–H(n = 1, 2) collisions studied systematically by theoretical approaches , 2011, 1112.3513.

[5]  J. Stober,et al.  Confinement of 'improved H-modes' in the all-tungsten ASDEX Upgrade with nitrogen seeding , 2011 .

[6]  W. Treutterer,et al.  Divertor power load feedback with nitrogen seeding in ASDEX Upgrade , 2010 .

[7]  P. Beiersdorfer,et al.  Cometary x-rays: line emission cross sections for multiply charged solar wind ion charge exchange , 2006 .

[8]  B. Pons,et al.  Charge transfer and ionization involving argon ions and neutral hydrogen , 2006 .

[9]  M. Bitter,et al.  Charge exchange produced K-shell x-ray emission from Ar16+ in a tokamak plasma with neutral beam injection , 2005 .

[10]  R. Causey,et al.  Beryllium-tungsten mixed-material interactions , 2005 .

[11]  B. Pons,et al.  Classical and semi-classical treatments of Li3+, Ne10++H(1s) collisions , 2004 .

[12]  T. Cravens,et al.  X-ray Emission from Comets , 2002, Science.

[13]  Nathan A. Schwadron,et al.  Implications of Solar Wind Composition for Cometary X-Rays , 2000 .

[14]  R. Olson,et al.  State-selective cross section scalings for electron capture collisions , 2000 .

[15]  A. Riera,et al.  Classical study of single-electron capture and ionization processes in A q+ +(H,H 2 ) collisions , 1999 .

[16]  M. Wade,et al.  Argon density measurements from charge–exchange spectroscopy , 1998 .

[17]  H. Jouin,et al.  Cross sections for electron capture from atomic hydrogen by fully stripped ions in the 0.05--1.00 a.u. impact velocity range , 1998 .

[18]  Thomas E. Cravens,et al.  Comet Hyakutake x‐ray source: Charge transfer of solar wind heavy ions , 1997 .

[19]  P. Krstic,et al.  Inelastic processes in 1-1000 keV/u collisions of Beq+ (q = 2–4) ions with atomic and molecular hydrogen , 1996 .

[20]  Gravielle,et al.  State-selective scaling for capture to the level n=4 by multicharged ions on light atoms. , 1995, Physical review. A, Atomic, molecular, and optical physics.

[21]  Gravielle,et al.  State-selective scaling in electron capture by multicharged ions on light atoms. , 1995, Physical review. A, Atomic, molecular, and optical physics.

[22]  H. Summers.  Need for cross sections in fusion plasma research , 1994 .

[23]  Toshima.  Ionization and charge transfer of atomic hydrogen in collision with multiply charged ions. , 1994, Physical review. A, Atomic, molecular, and optical physics.

[24]  R. Isler,et al.  An overview of charge-exchange spectroscopy as a plasma diagnostic , 1994 .

[25]  Gravielle Ms,et al.  Eikonal impulse approximation in electron-capture processes , 1991 .

[26]  D. Schultz,et al.  n, l Distributions for Electron-Capture from H(1s) by C6+ and O8+ , 1989 .

[27]  C. Reinhold,et al.  Classical charge transfer and ionisation cross sections for one- and three-dimensional collision processes , 1988 .

[28]  Datta,et al.  Charge transfer in collisions of atomic hydrogen with N7+ ions in the high-energy region. , 1987, Physical review. A, General physics.

[29]  Taylor,et al.  Critical test of first-order theories for electron transfer in collisions between multicharged ions and atomic hydrogen: The boundary condition problem. , 1987, Physical review. A, General physics.

[30]  H. Winter,et al.  State-selective electron capture in atom-highly charged ion collisions , 1985 .

[31]  S. Mukherjee,et al.  Charge-transfer cross sections by high-velocity, completely stripped boron and carbon ions from atomic hydrogen , 1983 .

[32]  R. Janev.  Excited States Created in Charge Transfer Collisions Between Atoms and Highly Charged Ions , 1983 .

[33]  R. Olson.  n,l distributions in Aq++H electron-capture collisions , 1981 .

[34]  M. Shah,et al.  One-electron capture and loss by fast multiply charged boron and carbon ions in H and H2 , 1979 .

[35]  Tsutomu Watanabe,et al.  Charge-transfer cross sections for collisions of Li/sup 3 +/, Be/sup 4 +/, B/sup 5 +/, and C/sup 6 +/ ions with atomic hydrogen , 1979 .

[36]  F. Meyer,et al.  Single-electron-capture cross sections for multiply charged O, Fe, Mo, Ta, W, and Au ions incident on H and H 2 at intermediate velocities , 1979 .