Straggling Effects on Resonant Yields

Lewis, Howard B.

doi:10.1103/physrev.125.937

Cited by 84 publications

(25 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in high-resolution experiments one observes a prominent Lewis peak [11] followed by damped oscillations on the plateau. This Lewis effect is caused by the quantized nature of the energy loss of the projectiles in matter.…”

Section: Analyses Results and Discussionmentioning

confidence: 94%

Low energy resonances in21Ne(p,?)22Na examined with a high energy resolution ion beam

Becker

Ebbing

Schulte

et al. 1992

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

The E R = 126, 272 and 291 keV resonances in the 21Ne(p, 7)22Na reaction have been investigated with a high-energy-resolution ion beam. The E R = 272 keV resonance was found to consist of two states separated by (888 + 5) eV, where the lower (higher) energy member is a high-spin (low-spin) state. All four resonances have widths less than a few eV, which is an improvement of nearly two orders of magnitude below previously reported limits. The influence of atomic effects on the determination of the correct value for the resonance energy is examined.

show abstract

Section: Analyses Results and Discussionmentioning

confidence: 94%

Low energy resonances in21Ne(p,?)22Na examined with a high energy resolution ion beam

Becker

Ebbing

Schulte

et al. 1992

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

show abstract

“…These effects can be accounted for by introducing respective folding functions into the integral (1). Concerning these functions we will make the following simplifying assumptions.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…As the experimental yield curve represents only relative yield measurements we do not have to specify ~(E) for the following discussion. Adopting these assumptions we can define the reaction yield in a realistic and more handy form 1 A…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Thus, the thick-target yield curve of a narrow resonance should exhibit a peak slightly above ER, followed by a flat plateau. This feature is usually referred to as the Lewis effect (or Lewis peak) [1]. This effect is a manifestation of the quantum nature of the energy transfers as the projectile slows down during its passage through the target.…”

Section: Introductionmentioning

confidence: 99%

“…In the original work of Lewis [1] the energy loss spectrum co(Q) of the projectiles in the target medium was assumed to be described by a series of equidistant spikes with decreasing amplitudes. In subsequent work [2][3][4][5][6][7][8] the collision spectrum co(Q) was assumed to arise predominantly from collisions with electrons in the target medium and to follow a 1/Q 2 law; however, this law is only valid for free electrons.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Monte Carlo simulations of the Lewis effect

Langanke

Reusch

Rolfs

1990

Z. Physik A - Atomic Nuclei

View full text Add to dashboard Cite

Recent experiments measuring the thick-target yield curve of narrow resonances in (p, ~/) reactions on 23Na, 26Mg and 27A1 nuclei clearly show the Lewis effect. We have studied this effect theoretically on the basis of a Monte Carlo simulation of the nuclear and electronic energy loss curve in the target. We are able to reproduce the experimental data qualitatively. We discuss possible implications of precision measurements of the Lewis effect.

show abstract

Elastic Backscattering of Ions for Compositional Analysis

Jeynes

2012

Characterization of Materials

View full text Add to dashboard Cite

BS (elastic backscattering spectrometry, either RBS or EBS) using MeV beams is used to obtain elemental depth profiles of thin films up to ∼10 mm thick. Depth resolution degrades with depth but can be ∼1 nm at the surface. Various ion beams and various beam energies can be selected to obtain the optimal analytical conditions for particular samples. We will briefly mention the use of microbeams since many samples are small or laterally non‐homogeneous. We will also briefly mention the use of ion channelling geometries for characterizing defects in single crystal samples. We should also mention that LEIS and MEIS are both RBS techniques, but they use low energy beams and will not be covered in this article. We treat all the IBA techniques synergistically. The present article considers the details of analysis using a particle detector placed in the backscattering direction. We explicitly distinguish between RBS and EBS, even though in any particular BS spectrum there may be (and often are) both RBS and EBS signals, since there is a philosophical difference of treatment between a signal resulting from a Coulomb interaction and one resulting from an interaction that must be treated quantum mechanically.

show abstract

Straggling Effects on Resonant Yields

Cited by 84 publications

References 2 publications

Low energy resonances in21Ne(p,?)22Na examined with a high energy resolution ion beam

Low energy resonances in21Ne(p,?)22Na examined with a high energy resolution ion beam

Monte Carlo simulations of the Lewis effect

Elastic Backscattering of Ions for Compositional Analysis

Contact Info

Product

Resources

About