GAMMA-RAY CORRELATION FUNCTION IN THE ADIABATIC APPROXIMATION

Journal Article · Wed Mar 01 04:00:00 EST 1961 · Physical Review (U.S.) Superseded in part by Phys.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.121.1493· OSTI ID:4066648

Blair, J S; Wilets, L

The gamma -ray correlation funotion following inelasic excitation of an even-A nucleus by a spinless projectile was analyzed, employing only the adiabatic approximation and theorems relevant to elastic scattering. Tbe direction tions in the scattering plane, the adiabatic recoil direction is a convenient axis for quantization. In particular, the intermediate: (excited) nucleus is populated with only even-M states, from which follows that the gamma distribution is unchanged by a rotation of pi about this axis. For a 0/sup +/- 2/sup +/-0/sup +/ excitation de-excitation, the gamma distribution in the scattering plane reduces to the form sin/sup 2/STA2 theta /sub i- theta /sub 0/)!, where theta /sub 0/ is the adiabatic recoil axis. Comparison is made to the similar predictions of plane-wave Born approximation theories (in which the recoil direction for finite energy transfer is the symmetry axis) and to distorted-wave Born approximation calculsions (for which, in general, there is no simple expression for the symmetry axis). Analysis of experiments verify the general features of the model, but further data obtained from forward scatering would be desirable to distinguish between the predictions of the adiabatic and Born approximations. Brief comments are made regarding gamma -ray polarization. (auth)

• Research Organization: Univ. of Washington, Seattle
• NSA Number: NSA-15-013609
• OSTI ID: 4066648
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 121; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ADIABATIC APPROXIMATION
BORN APPROXIMATION
CORRELATION FUNCTION
DISTRIBUTION
ENERGY LEVELS
EXCITATION
GAMMA RADIATION
NUCLEI
PERTURBATION THEORY
PHYSICS
POLARIZATION
SCATTERING