EFFECTS OF CONFIGURATION MIXING ON THE 3$sup -$ STATE OF Pb$sup 208$ AND THE (p,p') REACTION IN THE DISTORTED-WAVE APPROXIMATION

Journal Article · Fri Feb 15 00:00:00 EST 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.129.1754· OSTI ID:4723583

Choudhury, D C

It is shown that the experimental mean life of the first excited 3/sup -/ state of Pb/sup 208/ can be approximately accounted for if configuration mixing is introduced instead of considering this state as a pure single-particle shell- model state. For this purpose an octupole-octupole force is assumed (an extension of the quadrupole-quadrupole force of Elliott). Further, the direct interaction theory of inelastic scattering in the distorted-wave Born approximation is used to calculate the cross section of 23-Mev protons for excitation of the 0.57-Mev and 0.90-Mev levels of Pb STAcorresponding to the transitions (p/sub 1/2/)/sup -1/ yields (f/sub 5/2/)/sup -1/ and (p/sub 1/2/)/ sup -1/ yields (p/sub 3/2/)/sup -1/, respectively! and for excitation of the anomalous peak at 2.6 Mev (3- state of Pb/sup 208/) using the configuration-mixed nuclear wave function. It is suggested that the anomalous peak at 2.6 Mev for Pb/ sup 208/ and Pb/sup 207/ is also due to superposition of many single-particle transitions as in Pb/sup 208/. As a result of the configuration mixing, reasonable agreement is obtainied between the experimental and theoretical cross sections for the above-mentioned cases. Finally, various suggestions which can lead to better understanding of this process are made. (auth)

• Research Organization: Univ. of Connecticut, Storrs; and Oak Ridge National Lab., Tenn.
• NSA Number: NSA-17-011720
• OSTI ID: 4723583
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 129; Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

PHYSICS
BORN APPROXIMATION
CONFIGURATION
CROSS SECTIONS
ENERGY LEVELS
EXCITATION
HALF-LIFE
INTERACTIONS
LEAD 206
LEAD 207
LEAD 208
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICALS
ORBITS
PERTURBATION THEORY
PROTONS
SCATTERING
SHELL MODELS
TRANSITIONS