Back to Search
Start Over
Dipole strength distribution in Pb206 for the evaluation of the neutron capture cross section of Pb205
- Source :
- Physical Review C. 98
- Publication Year :
- 2018
- Publisher :
- American Physical Society (APS), 2018.
-
Abstract
- The dipole strength distribution of $^{206}\mathrm{Pb}$ was investigated via a nuclear resonance fluorescence experiment using bremsstrahlung produced with an electron beam at a kinetic energy of 10.5 MeV at the linear accelerator ELBE. We identified 88 states resonantly excited at energies from 3.7 to 8.2 MeV. The analysis of the measured $\ensuremath{\gamma}$-ray spectra includes the quasicontinuum of levels at high energy. Monte Carlo simulation of $\ensuremath{\gamma}$-ray cascades were performed to obtain the intensities of inelastic transitions and branching ratios of the ground-state transitions. The extracted photoabsorption cross section shows enhanced dipole strength at the excitation energies around 5.5 and 7 MeV, which may related to a pygmy dipole resonance. The present $(\ensuremath{\gamma},\ensuremath{\gamma}\ensuremath{'})$ data combined with $(\ensuremath{\gamma},n)$ data from the literature were used for confining input parameters of the statistical calculation code CCONE to derive the neutron-capture cross section of the unstable $^{205}\mathrm{Pb}$ nucleus.
- Subjects :
- Physics
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
Bremsstrahlung
Kinetic energy
01 natural sciences
Spectral line
Dipole
Excited state
0103 physical sciences
Neutron cross section
Nuclear resonance fluorescence
Atomic physics
Nuclear Experiment
010306 general physics
Excitation
Subjects
Details
- ISSN :
- 24699993 and 24699985
- Volume :
- 98
- Database :
- OpenAIRE
- Journal :
- Physical Review C
- Accession number :
- edsair.doi...........565ad5d2d7daf8f31d5ca59c6f5bb146