Further aspects of enhanced ion scattering near 180 degrees.
The role of rainbow scattering in enhanced ion scattering near 180{degree} was explored by comparing calculated enhancements for protons and antiprotons. Since the rainbow effect does not occur for negative particles and since the enhancement was much smaller for them than for positive particles, this comparison demonstrated in a more direct way than previously done the importance of rainbow scattering in producing the enhancement. A procedure for calculating a similarity factor between the ingoing and outgoing portions of a trajectory was developed, and its use showed that trajectories returning near 180{degree} differ in nature from random-return trajectories. A discussion is given of the possible relationship of the enhancement to phenomena such as the correlation effect in self-diffusion by the vacancy mechanism in solids and surface-structure studies by impact-collision ion-scattering spectrometry.
Scattering of low energy ions from surfaces at 180
Abstract Coaxial impact collision ion scattering spectroscopy (CAICISS), for which the scattering angle of the ions is almost 180°, is a promising new development for the determination of the atomic structures of crystalline surfaces. The primary advantage of this experimental configuration is that the scattering geometry is simpler than that for ion scattering at other angles. Since the backscattered particle nearly retraces the trajectory of the incident projectile, any target atom that participated in a shadowing interaction will also be involved in blocking. This double interaction causes large variations in both the scattering cross section and the position of the critical angle for scattering angles near 180° that must be considered when interpreting experimental data.
Creativity profile of university and conservatory dance students.
What are dance students' creative potential, Special personality characteristics and preferences for high energy activities? Using standardized and original paper and pencil instruments, comparisons were made among dance students in university and conservatory settings, college students and art students. The results demonstrated that dance students are creative, show strong preference for dynamic figures, and have distinct personality characteristics. The university dance students differed from the conservatory students in several important ways.