Separation of the screening and antiscreening effects in the electron loss of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><

Montenegro, E. C.; Melo, Wilson S.; Meyerhof, W. E.; Pinho, A. G. de

doi:10.1103/physrevlett.69.3033

Cited by 64 publications

(44 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5][6][7][8]) as well as exper imentally in numerous publicat io ns. After a fir st exper imental ident ificat io n of the process in the velocity ( v p ) dependence o f total pro ject ile io nizat io n cross sect ion due to its thresho ld behavior [9] -the energy o f the act ive target electron relat ive to the pro ject ile io n (E e = ½ v p 2 ; in atomic unit s: a.u.) has to be larger than the lowest ionizat io n potential o f the io nmany invest igat io ns co ncentrated to ident ify t his co ntr ibut ion by the appear ance o f character ist ic transit io n lines in high-r eso lut ion zero-degree electron spectra [10] or by it s specific kine mat ic signatures [11].…”

mentioning

confidence: 99%

Simultaneous Projectile-Target Ionization: A Novel Approach to (e, 2e) Experiments on Ions

et al. 2002

View full text Add to dashboard Cite

mentioning

confidence: 99%

Simultaneous Projectile-Target Ionization: A Novel Approach to (e, 2e) Experiments on Ions

et al. 2002

View full text Add to dashboard Cite

“…Historically, the term antiscreening was introduced to characterize only the active participation (excitation or ionization) of the projectile electrons in the target ionizing process [10,11]. Here we use it in a broader sense: We mean by antiscreening all kind of effects that result in an enhancement of the cross section due to the presence of the electrons in the projectile ion (including their passive participation in the target ionization; see above).…”

Section: Introductionmentioning

confidence: 99%

Multiple ionization of rare gases by hydrogen-atom impact

et al. 2013

View full text Add to dashboard Cite

Cross sections for the multiple ionization of He, Ne, Ar, and Kr by H 0 impact with and without the simultaneous ionization (electron loss) of the projectile are presented in the energy range 75-300 keV. The data were measured by coincident detection of the recoil target ions and the charge-state analyzed scattered projectiles. To obtain information about the role played by the electron of H 0 in the collision, the measurements were repeated with protons under the same experimental conditions. The measured data are analyzed using the classical trajectory Monte Carlo (CTMC) method. CTMC describes well the experimental data for both projectiles for single vacancy creation; however, increasing deviation is observed between theory and experiment with increasing number of created vacancies and with decreasing target atomic number.

show abstract

“…This threshold, however, is partially diffused by the rather broad electron momentum distribution due to its orbital motion around the target. Today, this process is well understood within the electron scattering model [2][3][4][5] and the Born approximation [6,7] and is found to be important in excitation [1,[7][8][9] and ionization [10][11][12][13] processes in ion-atom collisions [14][15][16]. It is particularly prevalent in ion collisions with low-Z targets, where competition from excitation due to the target-nucleus charge is relatively smaller [16].…”

Section: Introduction -The 1s2s2p 4 P Transfer-loss Puzzlementioning

confidence: 99%

Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Zouros¹,

Sulik²,

Gulyás³

et al. 2006

Braz. J. Phys.

View full text Add to dashboard Cite

Single differential cross-sections for transfer-loss (TL) leading to the production of O 5+ (1s2s 3 S)nl 4 L states were computed for 0.2-1.2 MeV/u collisions of O 5+ (1s 2 2s) ions with He and H 2 targets. At these collision energies, 1s loss is significant and electron transfer to n = 3 − 4 levels is dominant. Furthermore, due to spin conservation, quartet states can only be populated by TL. Within the independent particle model (IPM), the probability of 1s electron loss from O 5+ (1s 2 2s) projectiles was calculated using the semi-classical approach, while the probability for electron transfer to the O 5+ (1s2s 3 S)nl 4 L states (n ≥ 2) was computed using the continuum distorted wave (CDW) approximation. The majority of states with n > 2 can be assumed to have sufficient time to eventually decay with an almost 100% probability to the long-living metastable 1s2s2p 4 P level via a much faster sequence of electric dipole transitions, thus establishing an upper limit to such cascade contributions. The inclusion of this cascade feeding is found to lead to a strong enhancement in the production of the 1s2s2p 4 P states, particularly for collisions with the H 2 target, thus reducing dramatically the existing two-order of magnitude discrepancy between older TL calculations (for n = 2 only) and existing zero-degree Auger projectile electron spectroscopy measurements.

show abstract

Separation of the screening and antiscreening effects in the electron loss ofHe+onH2<

Cited by 64 publications

References 14 publications

Simultaneous Projectile-Target Ionization: A Novel Approach to (e, 2e) Experiments on Ions

Simultaneous Projectile-Target Ionization: A Novel Approach to (e, 2e) Experiments on Ions

Multiple ionization of rare gases by hydrogen-atom impact

Production of 1s2s2p4P states by transfer-loss cascades in O5+ collisions with he and H2 targets

Contact Info

Product

Resources

About