Interaction of 18-keV O{sup -} ions with Al{sub 2}O{sub 3} nanocapillaries

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.79.052902· OSTI ID:21308486

Guangzhi, Sun; Ximeng, Chen; Jun, Wang; Yifeng, Chen; Junkui, Xu; Chunlin, Zhou; Jianxiong, Shao; Ying, Cui; Baowei, Ding; Yongzhi, Yin; Xinan, Wang; Fengjun, Lou; Xueyang, Lv; Xiyu, Qiu; Juanjuan, Jia; Lin, Chen; Fayuan, Xi; Zichun, Chen; Lanting, Li; Zhaoyuan, Liu ^[1]

---

1. School of Nuclear Science and Technology, Lanzhou University, Gansu 730000 (China)

The transmission of 18-keV O{sup -} ions through Al{sub 2}O{sub 3} nanocapillaries with 50 nm in diameter and 12 {mu}m in length is studied in this work. By measuring angular distribution of transmitted particles when capillaries were tilted with respect to incident ion beam, two peaks were observed. It is distinguished that one of them is composed by direct transmitted ions and another one is composed by scattered ions. A phenomenon referred to as guiding effect, as found for highly charged ions and low-energy electrons, was observed. When negative ions (18-keV O{sup -}) are transmitted through nanocapillaries, most of them were ionized to neutral atoms and even positive ions. The intensity of transmitted particles (O{sup -}, O{sup 0}, and O{sup +}) decreased when the tilt angle increased. In transmitted particles, the fraction of O{sup -} declined but that of O{sup 0} and O{sup +} ions grew when the tilt angle grew. Both elastic collision and electrostatic scattering were found in scattered ions.

• OSTI ID: 21308486
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 79; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
ANGULAR DISTRIBUTION
ANIONS
CATIONS
CHANNELING
ELECTRONS
INTERACTIONS
ION BEAMS
KEV RANGE 10-100
OXYGEN
OXYGEN IONS
PARTICLES
SCATTERING