Isoscalar transition rates via $sup 40$Ca, $sup 208$Pb($alpha$$,$$alpha$') at 79 MeV
Journal Article
·
· Phys. Rev., C, v. 13, no. 3, pp. 1072-1082
OSTI ID:4012638
The inelastic scattering of $alpha$ particles from $sup 40$Ca and $sup 208$Pb has been studied at a bombarding energy of 79.1 MeV. Isoscalar transition rates have been extracted for the 2$sup +$ level at 3.90 MeV, the 3$sup -$ levels at 3.73, 6.29, and 6.58 MeV, and the 5$sup -$ level at 4.48 MeV in $sup 40$Ca. These have been compared to previous results, and a slight energy dependence is evident. In the case of $sup 208$Pb, the isoscalar transition rates have been extracted for the 2$sup +$ level at 4.09 MeV, the 3$sup -$ level at 2.62, and the 5$sup -$ levels at 3.22 and 3.73 MeV. The analysis of the Coulomb and nuclear interference for the 2$sup +$ level at 4.09 MeV indicates that $beta$/sub Coulomb/ =1.2$beta$/sub nuclear/. A folding model analysis has been made for the 3.73-MeV (3$sup -$) and 3.90-MeV (2$sup +$) levels in $sup 40$Ca and the 2.62-MeV (3$sup - $) and 4.09 MeV (2$sup +$) levels in $sup 208$Pb. This analysis, using an effective $alpha$ particle, bound nucleon interaction determined from 79-MeV elastic $alpha$-scattering data, is compared to a standard deformed optical potential analysis. Agreement between the two analyses is best for the 2$sup +$ state in $sup 208$Pb and worst for the 3$sup -$ state in $sup 40$Ca. The explicit inclusion of exchange effects tends to reduce the discrepancy between the two reaction models. (AIP)
- Research Organization:
- Cyclotron Institute and Physics Department, Texas AandM University, College Station, Texas 77843
- NSA Number:
- NSA-33-031759
- OSTI ID:
- 4012638
- Journal Information:
- Phys. Rev., C, v. 13, no. 3, pp. 1072-1082, Journal Name: Phys. Rev., C, v. 13, no. 3, pp. 1072-1082; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observed relations between proton spin observables in natural parity transitions in /sup 40/Ca(p,p')/sup 40/Ca and /sup 208/Pb(p,p')/sup 208/Pb reactions at 500 MeV
Isoscalar transition rates from inelastic alpha scattering
4.48-Mev LEVEL OF Ca$sup 4$$sup 0$
Journal Article
·
Fri Oct 01 00:00:00 EDT 1982
· Phys. Rev. C; (United States)
·
OSTI ID:7060418
Isoscalar transition rates from inelastic alpha scattering
Journal Article
·
Wed Jul 01 00:00:00 EDT 1992
· Physical Review, C (Nuclear Physics); (United States)
·
OSTI ID:7205937
4.48-Mev LEVEL OF Ca$sup 4$$sup 0$
Journal Article
·
Sat Sep 15 00:00:00 EDT 1962
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4743722
Related Subjects
*ALPHA REACTIONS-- INELASTIC SCATTERING
*CALCIUM 40 TARGET-- ALPHA REACTIONS
*CALCIUM 40-- ALPHA REACTIONS
*LEAD 208 TARGET-- ALPHA REACTIONS
*LEAD 208-- ENERGY-LEVEL TRANSITIONS
642403*
DWBA
MEV RANGE 10-100
N68531* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Energy Levels & Transitions
N68551 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Nuclear Reactions & Scattering
N68951 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
190 <= A <= 219--Nuclear Reactions & Scattering
*CALCIUM 40 TARGET-- ALPHA REACTIONS
*CALCIUM 40-- ALPHA REACTIONS
*LEAD 208 TARGET-- ALPHA REACTIONS
*LEAD 208-- ENERGY-LEVEL TRANSITIONS
642403*
DWBA
MEV RANGE 10-100
N68531* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Energy Levels & Transitions
N68551 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Nuclear Reactions & Scattering
N68951 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
190 <= A <= 219--Nuclear Reactions & Scattering