Inner-shell vacancy distribution in energetic Ar ions by penetration in solids

Zou, Yaming; Awaya, Y.; Bhalla, C. P.; Kambara, T.; Kanai, Yasuyuki; Oura, M.; Nakai, Yutaka; Ando, Kozo; Hitachi, A.; Kravis, Scott

doi:10.1103/physreva.51.3790

Cited by 11 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the large number of conceivable initial configurations, we restrict ourselves to 1s 0 2s 0 2p n , 1s 0 2s 1 2p n and 1s 0 2s 2 2p n with n = 1-6. Auger and x-ray spectra from states belonging to such configurations have been observed by Zou et al (1995) and Briand et al (1991). These states have very short lifetimes, typically of the order of 10 −15 s and decay predominantly by Auger and E1 radiative transitions.…”

Section: Introductionmentioning

confidence: 74%

See 1 more Smart Citation

Radiative and Auger de-excitation of hollow argon atoms

Karim

Grabbe

Bhalla

1996

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 74%

“…The Kα hypersatellite spectra showed eight well separated lines, corresponding to each of the eight possible number of spectator electrons in the L subshell. Recently Kα satellite and hypersatellite spectra from hollow argon atoms have also been produced by Zou et al (1995).…”

Section: Introductionmentioning

confidence: 99%

Radiative and Auger de-excitation of hollow argon atoms

Karim

Grabbe

Bhalla

1996

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…Similar to the experimental arrangement of I and II, the D 2 molecules are aligned perpendicular to the direction of a linearly polarized infrared laser. This configuration eliminates D + ions from being produced either through bond softening or through charge resonance enhancement ionization [9,10], even though both processes produce D + ions at lower kinetic energies which can be separated from the higher energy ions produced through the rescattering process [8] considered here. Following Fig.…”

mentioning

confidence: 99%

Probing Molecular Dynamics at Attosecond Resolution with Femtosecond Laser Pulses

2003

View full text Add to dashboard Cite

The kinetic energy distribution of D + ions resulting from the interaction of a femtosecond laser pulse with D2 molecules is calculated based on the rescattering model. From analyzing the molecular dynamics, it is shown that the recollision time between the ionized electron and the D + 2 ion can be read from the D + kinetic energy peaks to attosecond accuracy. We further suggest that more precise reading of the clock can be achieved by using shorter fs laser pulses (about 15fs).PACS numbers: 34.50. Rk, 31.70.Hq, 95.55.Sh Human experience shows that new areas of science and technology open up with the ability to make measurements at increasingly shorter time regime. With the advent of femtosecond (fs) lasers, femtochemistry became possible where chemical reaction dynamics can be probed at the atomic scale [1]. Clearly, fs lasers cannot be used directly to probe electron dynamics which is in the attosecond (as) regime. While a substantial effort is being dedicated to developing single attosecond pulses [2,3,4,5], presently few laboratories have such lasers available.An ingenious suggestion for performing measurements at attosecond resolution with fs lasers was proposed by Corkum and his group recently. Their results were reported in two recent publications, here to be called I [6] and II [7], respectively. In their experiment, a 40 fs pulse, with mean wavelength ranging from 800 nm to 1850 nm, and peak intensity of about 1.5 × 10 14 W/cm 2 , was used to ionize a D 2 molecule to produce D + ion. It was assumed that D 2 was first ionized near the peak of the laser pulse to create a correlated electronic and nuclear wave packet. Within a single optical cycle, the electron was driven back to collide with D + 2 and to excite it to the excited σ u electronic state which subsequently dissociated to produce D + . The kinetic energy of the D + ion reflects the internuclear distance, as well as the time when the rescattering occurs. With proper laser intensity, both the initial ionization and the rescattering are found to occur at time interval of far less than one optical cycle, thus providing attosecond temporal resolution, irrespective of the femtosecond pulse duration of the laser. In II, by changing the wavelength of the fs laser, they concluded that the dissociation dynamics of D + 2 can be used as a molecular clock and the clock can be read with attosecond resolution.To read the molecular clock accurately, the rescatter- * Contact: xmtong@phys.ksu.edu ing mechanism which leads to the measurable D + kinetic energy distribution has to be understood in details. In this Letter we report the main conclusion of our careful analysis of the rescattering mechanism. In contradiction to I and II, our analysis shows that the D + ions are not produced by the dissociation of the excited D + produced from Coulomb explosion vs. from dissociation was determined. Our analysis also shows that the dominant peak of the D + kinetic energy distribution is from the third return of the rescattering process, rather than from the first retu...

show abstract

“…In addition, the vacancies are also filled through a radiative electron capture (REC) process by the capture of quasi-free electrons from the target to inner-shell holes of the projectile atoms. Although the x-ray emission from the target atoms has been studied extensively, only a few systematic experimental studies have been reported on x-rays from projectiles in different solid targets (Mokler 1971, Woods et al 1973, Betz 1976, Watson et al 1978, Hay et al 1982, Awaya et al 1985, Zou et al 1995. Mokler (1971) has observed projectile x-ray spectra for iodine ions and has found a shift for the x-ray lines towards higher energy which has been explained as due to the loss of outer electrons and the creation of multi-vacancies in the inner shells.…”

Section: Introductionmentioning

confidence: 99%

“…The target atomic number dependence of the x-ray intensity ratio of the Kα hypersatellite to the Kα satellite and the Kβ satellite to the Kα satellite for 33 MeV argon ions passing through various foil targets have been presented by Awaya et al (1985). Very recently Zou et al (1995) have performed systematic studies on the Kα x-ray lines for argon ions (with energies between 43 and 300 MeV) passing through solid targets (with atomic number from 6 to 74). They have reported the intensity ratio of hypersatellite to 0953-4075/98/061225+12$19.50 c 1998 IOP Publishing Ltd satellite Kα x-ray lines for argon ions as functions of the target atomic number and the incident energy of argon projectiles.…”

Section: Introductionmentioning

confidence: 99%

Study of x-ray and L-REC photon emissions from highly ionized swift and projectiles passing through a thin carbon foil

Dhal

Padhi

Prasad

et al. 1998

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

X-rays and L-shell radiative electron capture (L-REC) photons have been detected from highly ionized swift projectiles of 75 As and 80 Se passing through a thin carbon foil at two incident projectile energies. All the K and L peaks show strong shifts towards higher energy as a result of multiple ionization of L-and M-shells. The Kβ/Kα intensity ratios have been found to be almost half of the value for the singly ionized atoms. The measured positions of various L and K x-ray peaks and the measured Kβ/Kα intensity ratios have been attributed to certain types of electronic configurations based on the extensive multiconfiguration Dirac-Fock calculations. Generally, it has been found that the lowest-energy configuration plays a rather small role, but in contrast the excited configurations with holes in the L-shell and with occupied 3d, 4s, 4p, 4d or higher subshells seem to be very important. The relative L-REC cross section between higher and lower projectile energies shows excellent agreement with the results obtained under the non-relativistic dipole approximation.

show abstract

Inner-shell vacancy distribution in energetic Ar ions by penetration in solids

Cited by 11 publications

References 28 publications

Radiative and Auger de-excitation of hollow argon atoms

Radiative and Auger de-excitation of hollow argon atoms

Probing Molecular Dynamics at Attosecond Resolution with Femtosecond Laser Pulses

Study of x-ray and L-REC photon emissions from highly ionized swift and projectiles passing through a thin carbon foil

Contact Info

Product

Resources

About