Low-energy absolute pair-production cross-section measurements in targets of Z = 13, 26, 29, 50, and 82

Journal Article · Sun Jan 01 04:00:00 EST 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.17.218· OSTI ID:5162663

Girard, T A; Blankenship, S M

Absolute cross sections for pair production by photons incident on targets of aluminum, iron, copper, tin, and lead were measured using the internal-source method. The measurements were made for the 1.119- and 2.6145-MeV ..gamma.. rays in the decays of /sup 46/Sc and /sup 228/Th, respectively, and also a composite cross section was measured for the mixture of the 1.1732- and 1.3325-MeV ..gamma.. rays in the decay of /sup 60/Co. The results are in general agreement with the theoretical predictions of Overbo and those of Tseng and Pratt, and clearly demonstrate the importance of accounting for electron screening of the nuclear Coulomb potential in the calculations.

• Research Organization: Department of Physics and Astronomy, University of South Carolina, Columbia, South California 29208
• OSTI ID: 5162663
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 17:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
640305* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Theory-- (-1987)
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM
ATOM COLLISIONS
COLLISIONS
COPPER
COULOMB FIELD
CROSS SECTIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
GAMMA RADIATION
INTERACTIONS
IONIZING RADIATIONS
IRON
LEAD
METALS
NUCLEAR SCREENING
PAIR PRODUCTION
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
RADIATIONS
SCREENING
TIN
TRANSITION ELEMENTS