Published November 2004 | Version v1
Journal article Metadata-only

Energy dependence of the astrophysical S factor for the 6Li(p,γ)7Be reaction

Creators

  • 1. Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27708 (United States)
  • 2. Department of Physics, North Georgia College and State University, Dahlonega, Georgia 30597 (United States)
  • 3. Department of Physics, Idaho State University, Pocatello, Idaho 83209 (United States)
  • 4. Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
  • 5. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States)
  • 6. Institut fur Theoretische Physik der Universitat Erlangen-Nurnberg, 91058 Erlangen (Germany)

Description

Polarized proton beams with energies from 80 to 130 keV have been used to determine the slope of the astrophysical S factor for the 6Li(p,γ0)7Be and 6Li(p,γ1)7Be reactions. The slope was determined from the relative yields at five incident proton energies. The slope of the S factor was found to be negative. The analyzing power measurements indicate that the reaction proceeds predominately by s-wave capture. The negative slope does not appear to be due to low-binding-energy effects, the effects of nearby resonances, or electron screening of the nuclei. A resonating group model calculation demonstrates a new mechanism for producing a negative slope at astrophysically relevant energies in radiative capture reactions

Additional details

Identifiers

DOI
10.1103/PhysRevC.70.055801;

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
70
Journal Issue
5
Journal Page Range
p. 055801-055801.8
ISSN
0556-2813
CODEN
PRVCAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37011683
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
BERYLLIUM 7; BINDING ENERGY; CAPTURE; ELECTRONS; ENERGY DEPENDENCE; KEV RANGE; LITHIUM 6 TARGET; NUCLEAR REACTION YIELD; NUCLEOSYNTHESIS; PHOTONS; POLARIZATION; POLARIZATION-ASYMMETRY RATIO; PROTON BEAMS; PROTON REACTIONS; RESONANCE; S WAVES; SCATTERING
Descriptors DEC
ALKALINE EARTH ISOTOPES; BARYON REACTIONS; BEAMS; BERYLLIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BOSONS; CHARGED-PARTICLE REACTIONS; DAYS LIVING RADIOISOTOPES; DIMENSIONLESS NUMBERS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; EVEN-ODD NUCLEI; FERMIONS; HADRON REACTIONS; ISOTOPES; LEPTONS; LIGHT NUCLEI; MASSLESS PARTICLES; NUCLEAR REACTIONS; NUCLEI; NUCLEON BEAMS; NUCLEON REACTIONS; PARTIAL WAVES; PARTICLE BEAMS; RADIOISOTOPES; SYNTHESIS; TARGETS; YIELDS

Optional Information

Notes
(c) 2004 The American Physical Society