N$sup 14$(/cap alpha/,/cap alpha/)N$sup 14$ AND N$sup 14$(/cap alpha/ ,p)O$sup 17$ DIFFERENTIAL CROSS SECTIONS

Journal Article · Sat Nov 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys.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.112.1210· OSTI ID:4275653

Herring, D F; Chiba, R

The N/sup 14/( alpha , alpha )N/sup 14/ and N/aup 14( alpha , p)O/sup 17/ differential cr oss sections were measured for alpha -particle bombarding energies from 2.0 to 3.8 Mev. A differentially pumped gas scattering chamber was used. The N/sup 14/( alpha , alpha )N/sup 14/ differential cross sections were measured at center-of-mass angles of 170.8 deg . 140.6 deg . 125.1 deg . and 91.0 deg . Resonances were observed at 2.351. 2.370. 2.767. 2.568. 2.870. 3.080. 3.576 Mev and ~3.67 and ~3.71 Mev. The N/sup 14/( alpha ,p)O/sup 17/ differential cross sections were measured for alpha particle bombarding energies from 2.7 to 3.8 Mev at center-ofmass angles of 169.7 deg . 135.6 deg . 119.0 deg . and 84.7 deg . Resonances in the N/sup 14/( alpha ,p)O/sup 17/ differential cross section were observed at alpha -particle bombarding energies of 2.868. 3.080. and 3.69 Mev. (auth) The Nl/sup 14/( alpha , alpha )N/sup 14/ differential cross sections reported in the previous paper were analyzed using the dispersion formalism to obtain properties of ihe energy levels of F/sup 18/. A detailed fit of the calculated cross section to the experimental data was possible for the two broad resonances in the 3-Mev (lab) region. The 3.7-Mev (lab) anomaly cannot be accounted for by a single level. For the remaining levels, a detailed fit of the calculated cross section to the experimental data was not attempted. It was possible, however, to restrict the J values and parity of these levels by a qualitative inspection of the data. (auth)

• Research Organization: Univ. of Wisconsin, Madison
• NSA Number: NSA-13-008140
• OSTI ID: 4275653
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 112; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA BEAMS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CROSS SECTIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
GASES
MEASURED VALUES
NITROGEN 14
NUCLEAR REACTIONS
OXYGEN 17
PHYSICS AND MATHEMATICS
PROTONS
RESONANCE
SCATTERING