Photoproton decay of the /sup 31/P giant resonance

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.1071· OSTI ID:5885719

Kerkhove, E; Ferdinande, H; Van Otten, P; Ryckbosch, D; Van de Vyver, R; Berkvens, P; Van Camp, E; Aksoy, A

The /sup 31/P(..gamma..,p)/sup 30/Si reaction was studied at seven angles for nine bremsstrahlung end point energies varying from 17 to 25 MeV in 1 MeV steps. Absolute (..gamma..,p/sub 0/) and (..gamma..,p/sub 1/) angular cross sections for /sup 31/P in the excitation energy interval between 14.6 and 25 MeV were extracted and angular distribution factors were deduced by fitting a sum of Legendre polynomials to the data. Absolute cross sections for various other photoproton reaction channels were determined using an artificially constructed pseudo-monoenergetic photon spectrum. The total (..gamma..,p) cross section was evaluated up to 24 MeV excitation energy. About 53% of this cross section is due to a direct-semidirect reaction mechanism. The angular distribution factors in the (..gamma..,p/sub 0/) channel were used to estimate the contribution of E2 photon absorption in this channel. It was found that between 48% and 63% of the isoscalar E2 energy-weighted sum rule is exhausted by this (..gamma..,p/sub 0/) channel.

• Research Organization: Laboratorium voor Kernfysica, Rijksuniversiteit Gent, B-9000 Gent, Belgium
• OSTI ID: 5885719
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651425* -- Nuclear Properties & Reactions
A=20-38
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
BREMSSTRAHLUNG
CAPTURE
CROSS SECTIONS
DISTRIBUTION
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
FERMIONS
FUNCTIONS
GIANT RESONANCE
HADRONS
ISOTOPES
LEGENDRE POLYNOMIALS
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PHOSPHORUS 31
PHOSPHORUS 31 TARGET
PHOSPHORUS ISOTOPES
PHOTONUCLEAR REACTIONS
PHOTOPROTONS
POLYNOMIALS
PROTONS
RADIATIONS
RESONANCE
STABLE ISOTOPES
SUM RULES
TARGETS
TOTAL CROSS SECTIONS