Interference between Rayleigh, Delbruck, and nuclear resonance scattering processes

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.1519· OSTI ID:5593798

Kahane, S; Moreh, R; Shahal, O

The forward scattering cross section at theta = 1/sup 0/ and 1.7/sup 0/ of E = 4--10 MeV monoenergetic photons from Pb and Bi targets has been measured. The photon beam was obtained from the Fe(n,..gamma..) reaction. The elastic cross section at such angles, being dominated by Rayleigh and Delbruck scattering processes, was measured relative to the Compton cross section. The fact that one of the ..gamma.. lines of the Fe(n,..gamma..) reaction happens to overlap the 7.28 MeV level in /sup 208/Pb, yielding a strong nuclear resonance fluorescence signal, enabled us to observe, for the first time, an interference effect with the Rayleigh and Delbruck scattering processes. A theoretical expression of the nuclear resonance scattering amplitude for the specific case of the random photoexcitation process is derived. The interference effect of this latter process with Rayleigh and Delbruck scattering is calculated and an excellent agreement with measured values is obtained.

• Research Organization: Nuclear Research Center, Negev, Beer-Sheva, Israel and Ben-Gurion University of the Negev, Beer-Sheva, Israel
• OSTI ID: 5593798
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BISMUTH 209 TARGET
COHERENT SCATTERING
COMPTON EFFECT
CROSS SECTIONS
DELBRUECK SCATTERING
DISTRIBUTION
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ENERGY RANGE
FLUORESCENCE
INELASTIC SCATTERING
INTERACTIONS
LEAD 208 TARGET
LUMINESCENCE
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
PHOTONUCLEAR REACTIONS
RAYLEIGH SCATTERING
SCATTERING
SCATTERING AMPLITUDES
TARGETS