Bragg's rule study in binary metal alloys and metal oxides for MeV $sup 4$He$sup +$ ions

Journal Article · Mon Dec 17 04:00:00 EST 1973 · Thin Solid Films, v. 19, no. 2, pp. 227-238

DOI:https://doi.org/10.1016/0040-6090(73)90058-8· OSTI ID:4325658

Feng, J S.Y.; Chu, W K; Nicolet, M A

From international conference on ion beam surface layer analysis; Yorktown Heights, NY (18 Jun 1973). A self-consistent procedure for testing Bragg's rule in solids is described and applied to /sup 4/He/sup +/ ions between 0.5 and 2.25 MeV for the binary metal systems Au-Ag, Au- Cu and Au-Al. The validity of the procedure is verified by numerical analysis. Bragg's rule correctly predicts the energy loss in Au-Al and Au-Ag mixtures to within the 1% sensitivity of the experiment and to within 2% in Au-- Cu alloys. It is proposed that Bragg's rule is valid for all metal alloys. A second method has been applied to the oxides of iron and aluminum. This yield ratio test'' assumes that the composition of the target and the elemental stopping cross sections are known. The measured relative stopping powers in alpha -Fe/sub 2/O/sub 3/ and Fe/ sub 3/O/sub 4/ are consistent wi th the use of Bragg's rule and the available elemental stopping data. The relative stopping power in Al/sub 2/O/sub 3/ differs by about 10% from the expected value. (auth)

• Research Organization: California Inst. of Tech., Pasadena
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-025874
• OSTI ID: 4325658
• Journal Information: Thin Solid Films, v. 19, no. 2, pp. 227-238, Journal Name: Thin Solid Films, v. 19, no. 2, pp. 227-238; ISSN THSFA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINIUM OXIDES
BRAGG REFLECTION ALUMINIUM ALLOYS-- GOLD ALLOYS
COPPER ALLOYS-- GOLD ALLOYS
GOLD ALLOYS-- SILVER ALLOYS
IRON OXIDES
N72100* --Physics (Radiation & Shielding)--Radiation Physics