Studies of neonL-shell excitation by impact of highly ionized heavy ions

Sellin, I. A.; Vane, C. R.; Elston, S. B.; Forester, J. P.; Griffin, P. M.; Pegg, D. J.; Thoe, R. S.; Groeneveld, K. O.; Laubert, R.; Chen, F.

doi:10.1007/bf01409511

Cited by 19 publications

(5 citation statements)

References 9 publications

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“…In order to perform similar experiments on Argon ions, we have first improved our experimental set-up using a neon target. The number of lines detected has been larger than those observed previously [4]. This is due to better resolution and signal to noise ratio.…”

Section: Introductioncontrasting

confidence: 55%

“…As it was already described [4], the relative intensity of lines emitted by recoil-ions is quite different from that obtained in beam-foil experiments. The impact creates with higher probability certain specific excited states.…”

Section: Ne 11 To Ne IXmentioning

confidence: 54%

“…Most transitions have been identified, using the data tabulated by Hermansdorfer [6] Wiese [A and Kelly [8] or obtained in beam-foil spectroscopy [9]. We have pointed 133 transitions in Ne I1 to Ne IX due to the better resolution of the lines obtained in similar experiments done by Sellin et al [4] (27 lines) and ourselves [lo] (65 lines). The agreement is quite good except for the short wavelength domain in which our values seem about 0.15 A higher than the previously determined ones; that discrepancy remains within our experimental accuracy.…”

Section: Ne 11 To Ne IXmentioning

confidence: 64%

“…The VUV analyses of high charged Ne-ions emission was initiated by Sellin et al [4]. In order to perform similar experiments on Argon ions, we have first improved our experimental set-up using a neon target.…”

Section: Introductionmentioning

confidence: 99%

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VUV Spectra of Multicharged Recoil-Ions: Neon and Argon

et al. 1986

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The impact of highly charged and high energy ions in a gas target produces excited recoil-ions. The speed of these ions being quite low, the Doppler shifts and broadening of emitted lines are very small. With a Kr20+ beam at 1.15 MeV/amu, we have observed the spectra of Ne ions in the wavelength range 60-570 Å and of Ar ions in the range 150-290 Å. In the first one, 130 lines have been identified, classified and compared to previous results. In the second one, 55 lines have been observed, 12 transitions unknown up to now are determined and compared to similar transitions for isoelectronic ions. The 3p4d configuration in Ar V is analysed, taking into account the intermediate coupling.

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Section: Introductioncontrasting

confidence: 55%

Section: Ne 11 To Ne IXmentioning

confidence: 54%

Section: Ne 11 To Ne IXmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

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VUV Spectra of Multicharged Recoil-Ions: Neon and Argon

et al. 1986

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“…These differences in excitation conditions and delay times result in very different spectra in the two cases, so different that it can be very difficult to relate the recoil-ion and beam-foil spectra. Even for lines belonging to a given state of ionization, the relative intensities in recoil-ion spectra can be very different from the relative intensities in beam-foil spectra [7]. This well-known difference notwithstanding, it is still difficult to understand how the transitions from the resonance levels can be so weak in the recoil-ion spectra when the transitions assigned by Lesteven-Vakse et al as cascades into these levels are so [SI, while the lower spectrum is obtained using beam-foil excitation of 1.64 MeV Ar+ ions.…”

Section: Assignment Of Energy Levels In Ar VImentioning

confidence: 98%

Energy level and lifetime measurements for Ar VI

Pinnington

Ansbacher

et al. 1989

Phys. Scr.

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Assignments are suggested for 32 transitions in Ar VI involving doublet levels in the 3p' and 3s3p3d configurations. Beam-foil decay curves are used to measure the lifetimes of these levels, the results being systematically about 25% longer than the values calculated by Fawcett. These decays are also used in ANDC analyses of the lifetimes of the 3.13~' 2S, *P, 2D and 3?3d 'D levels, where the agreement with Fawcett's calculation is generally good. A discussion is also given of the alternative analysis of the Ar VI spectrum recently published by Lesteven-Vake et al. using recoil-ion techniques.a Configuration-interaction calculation using scaled Slater integrals [6].Analysis incorporating cascade data from 3s3p('P)3d 'P.Analysis incorporating cascade data from 3s3p('P)3d ' P , 3s3p('P)3d 2P and '0.Analysis incorporating cascade data from 3p' ' P and '0.e Analysis incorporating cascade data from 3s3d('P)3d 'F, 3s3p('P)3d 2D and 'F.

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Multiple Ionization and Excitation Processes in Single Ion-Atom Collisions

Elston

1981

Inner-Shell and X-Ray Physics of Atoms and Solids

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The topic of multiple ionization and excitation processes occurring in collisions between highly charged heavy ions and atomic targets has received heavy experimental and theoretical attention for at least the past decade. Much of the activity in the field arose from the increasing availability to atomic physicists of accelerators capable of producing fast beams of highly stripped ions, the wealth of complex phenomena produced by the rapid and transient introduction of extremely large perturbing forces into otherwise stable atomic systems, and a desire to unravel that complexity with simple models. Considerable progress has been made toward cataloging, quantifying, and understanding these processes, but many results are still unexplained and new realms of the atomic structure and collision physics of highly charged ions remain unexplored, awaiting new technologies and daring ideas.It is far beyond the scope of the present paper to provide a complete review of the many sub-topics that fall into this category; in any case a number of excellent reviews can be found in the book edited by Sellin containing, among other related topics, surveys of electron emission phenomena by Stolterfoht, x-ray production by Mokler and Folkmann, excited state lifetime measurements and production of slow highly charged recoil ions by Sellin* and theoretical aspects of inelastic ion-atom collisions by Briggs and Taulbjerg.5 Several older yet quite pertinent and very readable reviews appear in the book edited by Crasemann, notably the theoretical contribution of Madison and Merzbacher and the experimental review by Richard. 8In an attempt to keep the present work within manageable proportions, I propose to discuss several experimental methods which, by relying on intentionally imposed restrictions such as coincidence mmrn e r-..y^V imt9m J^

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Studies of neonL-shell excitation by impact of highly ionized heavy ions

Cited by 19 publications

References 9 publications

VUV Spectra of Multicharged Recoil-Ions: Neon and Argon

VUV Spectra of Multicharged Recoil-Ions: Neon and Argon

Energy level and lifetime measurements for Ar VI

Multiple Ionization and Excitation Processes in Single Ion-Atom Collisions

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