Neutron capture cross section of natural silicon
Journal Article
·
· Nucl. Phys., A, v. 252, no. 1, pp. 62-76
The neutron capture cross section of natural silicon has been measured to 1500 keV by using the capture cross section facility of the 40-m station of the Oak Ridge Electron Linear Accelerator. Analysis of the present data, in combination with existing total cross section information, has provided almost complete resonance data for $sup 28$Si. On the other hand, the capture kernel only (GAMMA/sub n/GAMMA/sub $gamma$/GAMMA) has been obtained for neutron capture resonances in $sup 29$Si and $sup 30$Si. A strong positive correlation has been observed between the radiative width and the corresponding reduced neutron width for p-wave resonances in $sup 28$Si, confirming significant valence effects. It is noted that a quantitative valence calculation provides only an approximate estimate of the valence strength for this nucleus. It was not possible to confirm, from the present measurements, reported asymmetry observed in two resonances in the $sup 29$Si($gamma$,n) reaction. (NL)
- Research Organization:
- Australian Atomic Energy Commission Research Establishment, Lucas Heights
- NSA Number:
- NSA-33-018928
- OSTI ID:
- 4102624
- Journal Information:
- Nucl. Phys., A, v. 252, no. 1, pp. 62-76, Journal Name: Nucl. Phys., A, v. 252, no. 1, pp. 62-76; ISSN NUPAB
- Country of Publication:
- Netherlands
- Language:
- English
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642205*
CAPTURE-- ENERGY DEPENDENCE-- EXCITATION FUNCTIONS-- KEV RANGE 01-10-- KEV RANGE 10-100-- KEV RANGE 100-1000-- MEV RANGE 01-10-- NEUTRON REACTIONS-- SILICON-- SILICON 28 TARGET
D WAVES
LEVEL WIDTHS
N68431 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Energy Levels & Transitions
N68451* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Nuclear Reactions & Scattering
P WAVES
RESONANCE
S WAVES
SPIN ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS
CAPTURE-- ENERGY DEPENDENCE-- EXCITATION FUNCTIONS-- KEV RANGE 01-10-- KEV RANGE 10-100-- KEV RANGE 100-1000-- MEV RANGE 01-10-- NEUTRON REACTIONS-- SILICON-- SILICON 28 TARGET
D WAVES
LEVEL WIDTHS
N68431 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Energy Levels & Transitions
N68451* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
20 <= A <= 38--Nuclear Reactions & Scattering
P WAVES
RESONANCE
S WAVES
SPIN ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS