Back-angle elastic alpha scattering from $sup 89$Y and $sup 90$ $sup 91$ $sup 94$Zr
Journal Article
·
· Phys. Rev., C, v. 12, no. 5, pp. 1447-1451
OSTI ID:4133917
Excitation functions and angular distributions for elastic $alpha$ scattering from target nuclei around A = 90 have been measured in an effort to obtain a precise picture of the cross sections at backward angles. Excitation functions between E/sub alpha/(lab) = 18 through 25 MeV for $alpha$ + $sup 89$Y and $alpha$ + $sup 90$ $sup 91$ $sup 94$Zr have been measured in steps of 500 keV or less at angles between 141$sup 0$ and 176$sup 0$ (lab). Near 180$sup 0$, narrow (about 1 MeV minima, with a drop in cross section by more than an order of magnitude, are observed around E/sub alpha/ = 23 MeV for the $alpha$ + $sup 89$Y and $alpha$ + $sup 90$ $sup 91$Zr elastic scattering. A similar, but less pronounced, structure is seen in the excitation function for $alpha$ + $sup 94$Zr. Angular distributions between 48.5$sup 0$ and 176$sup 0$ (lab) measured at several energies in 2.5$sup 0$ steps show a regular, diffractionlike pattern over the entire angular range. A standard four-parameter Woods-Saxon potential is found to be sufficient to provide a detailed fit to the experimental data including the minima in the excitation functions at back angles. (AIP)
- Research Organization:
- Sektion Physik, Universitat Muenchen, D-8046 Garching, Germany
- NSA Number:
- NSA-33-010827
- OSTI ID:
- 4133917
- Journal Information:
- Phys. Rev., C, v. 12, no. 5, pp. 1447-1451, Journal Name: Phys. Rev., C, v. 12, no. 5, pp. 1447-1451; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*ALPHA REACTIONS-- ELASTIC SCATTERING
*YTTRIUM 89 TARGET-- ALPHA REACTIONS
*YTTRIUM 89-- ALPHA REACTIONS
*ZIRCONIUM 90 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 90-- ALPHA REACTIONS
*ZIRCONIUM 91 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 91-- ALPHA REACTIONS
*ZIRCONIUM 94 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 94-- ALPHA REACTIONS
642805*
ANGULAR DISTRIBUTION
EXCITATION FUNCTIONS
MEV RANGE 10-100
N68651 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89--Nuclear Reactions & Scattering
N68751* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
90 <= A <= 149--Nuclear Reactions & Scattering
OPTICAL MODELS
WOODS-SAXON POTENTIAL
*YTTRIUM 89 TARGET-- ALPHA REACTIONS
*YTTRIUM 89-- ALPHA REACTIONS
*ZIRCONIUM 90 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 90-- ALPHA REACTIONS
*ZIRCONIUM 91 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 91-- ALPHA REACTIONS
*ZIRCONIUM 94 TARGET-- ALPHA REACTIONS
*ZIRCONIUM 94-- ALPHA REACTIONS
642805*
ANGULAR DISTRIBUTION
EXCITATION FUNCTIONS
MEV RANGE 10-100
N68651 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89--Nuclear Reactions & Scattering
N68751* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
90 <= A <= 149--Nuclear Reactions & Scattering
OPTICAL MODELS
WOODS-SAXON POTENTIAL