CROSS-SECTION FOR THE (n,2n) REACTION ON C$sup 12$, N$sup 14$, O$sup 16$, AND F$sup 19$ IN THE 10 TO 37 Mev ENERGY RANGE (in Russian)
Journal Article
·
· Doklady Akad. Nauk S.S.S.R.
OSTI ID:4042911
Cross sections of (n, 2n) reactions on light nuclei at 10 to 35 Mev were measured using neutrons from D(d, n)He/sup 3/ and T(d, n)He/sup 4/ reactions excited by 20 Mev deuterons. Solid ZnT and gaseous deuterium were used as targets. The activities of prepared specimens of carbon, ammonium nitate and teflon (CF/sub 2/) irradiated by neutrons at 0 deg under standard conditions were measured with Geiger counters. The absolute magnitude of (n, 2n) reaction cross sections was determined for carbon at E/sub n/ = 34 Mev and for fluorine at E/sub n/ =25 and 14 Mev. The 14-Mev neutrons were obtained in T(d, n)He/sup 4/ reactions. The results are plotted and the absolute values determined with an order of accuracy of plus or minus 30%. The neutron energy spread had a maximum of 0.7 Mev. In spite of the high level of error, the cross section curves plotted as functions of energy are considered reliable. A definite drop in cross sections following the C/sup 12/, N/sup 14/, and O/sup 18/ maximums was observed. The small reaction cross sections in comparison to the total inelastic interaction cross sections is a peculiar characteristic of C/sup 12/, N/sup 14/, and O/sup 16/. The mechanism of the (n, 2n) reaction on light nuclei can be described as a combination of direct "knocking out" of a neutron and neutron pick- up similar to that in (n, d) reaction. (R.V.J.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-015062
- OSTI ID:
- 4042911
- Journal Information:
- Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 136
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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Fri Jul 01 00:00:00 EDT 1960
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Related Subjects
AMMONIUM COMPOUNDS
CARBON
CARBON 12
CROSS SECTIONS
DEUTERIUM
DEUTERON BEAMS
DIAGRAMS
ENERGY
ENERGY RANGE
ERRORS
EXCITATION
FAST NEUTRONS
FLUORINATED HYDROCARBONS
FLUORINE 19
GASES
GEIGER-MUELLER COUNTERS
HELIUM 3
HELIUM 4
INTERACTIONS
IRRADIATION
MEASURED VALUES
NEUTRON SOURCES
NEUTRONS
NITRATES
NITROGEN 14
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ORGANIC FLUORINE COMPOUNDS
OXYGEN 16
PHYSICS
POLYMERS
PREPARATION
PROTONS
RADIOACTIVITY
TARGETS
TEFLON
TRITIUM
ZINC COMPOUNDS
CARBON
CARBON 12
CROSS SECTIONS
DEUTERIUM
DEUTERON BEAMS
DIAGRAMS
ENERGY
ENERGY RANGE
ERRORS
EXCITATION
FAST NEUTRONS
FLUORINATED HYDROCARBONS
FLUORINE 19
GASES
GEIGER-MUELLER COUNTERS
HELIUM 3
HELIUM 4
INTERACTIONS
IRRADIATION
MEASURED VALUES
NEUTRON SOURCES
NEUTRONS
NITRATES
NITROGEN 14
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ORGANIC FLUORINE COMPOUNDS
OXYGEN 16
PHYSICS
POLYMERS
PREPARATION
PROTONS
RADIOACTIVITY
TARGETS
TEFLON
TRITIUM
ZINC COMPOUNDS