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)
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., Vol. Vol: 136; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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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
POLYMERS
PREPARATION
PROTONS
RADIOACTIVITY
TARGETS
TEFLON
TRITIUM
ZINC COMPOUNDS