Some Measurements of Atmospheric Neutrons
A series or airplane flights carrying neutron counters to an altitude of 700 g cm/sup -2/ was made at 52 20 north geomagnetic latitude in 1955. Enriched and normal BF/sub 3/ counters were covered with Cd, Sn, Pyrex, and limeglass shields. the ratios or the counting rates of the variously shielded co...
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| Veröffentlicht in: | Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, 1958-01, Vol.112 (2), p.497-502 |
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| container_title | Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D |
| container_volume | 112 |
| creator | Gabbe, John D. |
| description | A series or airplane flights carrying neutron counters to an altitude of 700 g cm/sup -2/ was made at 52 20 north geomagnetic latitude in 1955. Enriched and normal BF/sub 3/ counters were covered with Cd, Sn, Pyrex, and limeglass shields. the ratios or the counting rates of the variously shielded counters are compared with the ratios calculated theoretically on a thick-shield basis using the neutron energy distribution function derived by Freese and Meyer. The neutron-production data taken by Davis and by Staker and Pyrex-glanss- envelope BF/sub 3/ counters are corrected for the absorption of neutrons by the boron in the Pyrex. The corrected neutron-production rates are recalculated to be 2.1 plus or minus 0.4 cm/sup -2/ sec/sup -1/ and 0.9 plus or minus 0.2 cm/ sup -2/ sec/sup -1/ at 54 36 and 30 24 north geomagnetic latitude, respectively, using recent values for the various neutron cross sections. These corrected rates agree, to within 5%, with the recent measurements reported by Soberman. The above energy distribution function was found, within the limited accuracy of the experiment, to describe the energy distribution of atmospheric neutrons. (auth) |
| doi_str_mv | 10.1103/PhysRev.112.497 |
| format | Article |
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Enriched and normal BF/sub 3/ counters were covered with Cd, Sn, Pyrex, and limeglass shields. the ratios or the counting rates of the variously shielded counters are compared with the ratios calculated theoretically on a thick-shield basis using the neutron energy distribution function derived by Freese and Meyer. The neutron-production data taken by Davis and by Staker and Pyrex-glanss- envelope BF/sub 3/ counters are corrected for the absorption of neutrons by the boron in the Pyrex. The corrected neutron-production rates are recalculated to be 2.1 plus or minus 0.4 cm/sup -2/ sec/sup -1/ and 0.9 plus or minus 0.2 cm/ sup -2/ sec/sup -1/ at 54 36 and 30 24 north geomagnetic latitude, respectively, using recent values for the various neutron cross sections. These corrected rates agree, to within 5%, with the recent measurements reported by Soberman. The above energy distribution function was found, within the limited accuracy of the experiment, to describe the energy distribution of atmospheric neutrons. (auth)</description><identifier>ISSN: 0031-899X</identifier><identifier>DOI: 10.1103/PhysRev.112.497</identifier><language>eng</language><subject>ABSORPTION ; ATMOSPHERE ; BORON FLUORIDES ; CADMIUM ; COUNTERS ; CROSS SECTIONS ; DISTRIBUTION ; ENERGY ; ERRORS ; GEOPHYSICS ; GLASS ; MEASURED VALUES ; NEUTRON DETECTION ; NEUTRONS ; NUMERICALS ; PHYSICS AND MATHEMATICS ; POLYMERS ; RADIATION DETECTORS ; SHIELDING ; SPECTRA ; THICKNESS ; TIN</subject><ispartof>Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. 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D</title><description>A series or airplane flights carrying neutron counters to an altitude of 700 g cm/sup -2/ was made at 52 20 north geomagnetic latitude in 1955. Enriched and normal BF/sub 3/ counters were covered with Cd, Sn, Pyrex, and limeglass shields. the ratios or the counting rates of the variously shielded counters are compared with the ratios calculated theoretically on a thick-shield basis using the neutron energy distribution function derived by Freese and Meyer. The neutron-production data taken by Davis and by Staker and Pyrex-glanss- envelope BF/sub 3/ counters are corrected for the absorption of neutrons by the boron in the Pyrex. The corrected neutron-production rates are recalculated to be 2.1 plus or minus 0.4 cm/sup -2/ sec/sup -1/ and 0.9 plus or minus 0.2 cm/ sup -2/ sec/sup -1/ at 54 36 and 30 24 north geomagnetic latitude, respectively, using recent values for the various neutron cross sections. These corrected rates agree, to within 5%, with the recent measurements reported by Soberman. The above energy distribution function was found, within the limited accuracy of the experiment, to describe the energy distribution of atmospheric neutrons. (auth)</description><subject>ABSORPTION</subject><subject>ATMOSPHERE</subject><subject>BORON FLUORIDES</subject><subject>CADMIUM</subject><subject>COUNTERS</subject><subject>CROSS SECTIONS</subject><subject>DISTRIBUTION</subject><subject>ENERGY</subject><subject>ERRORS</subject><subject>GEOPHYSICS</subject><subject>GLASS</subject><subject>MEASURED VALUES</subject><subject>NEUTRON DETECTION</subject><subject>NEUTRONS</subject><subject>NUMERICALS</subject><subject>PHYSICS AND MATHEMATICS</subject><subject>POLYMERS</subject><subject>RADIATION DETECTORS</subject><subject>SHIELDING</subject><subject>SPECTRA</subject><subject>THICKNESS</subject><subject>TIN</subject><issn>0031-899X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1958</creationdate><recordtype>article</recordtype><recordid>eNotkDtrwzAURjW00DTt3NV06-BEL8vSGEJfkD7oA7oJ-0rCLrUVdJVC_n1dkunjwOEbDiFXjC4Yo2L52u3xzf9OwBfS1CdkRqlgpTbm64ycI35TyqSRckZu3uPgiyff4C75wY8ZixiKVR4ibjufeiie_S6nOOIFOQ3ND_rL487J593tx_qh3LzcP65XmxK40rlUUIcgGXMAXBshwZm6VbSRFQsytCDbABXzwWndauWEYk5Uhgcna9NWYMScXB9-I-beIvTZQwdxHD1kKwVT3OhJWh4kSBEx-WC3qR-atLeM2v8E9phgAm6nBOIPOBlSoQ</recordid><startdate>19580101</startdate><enddate>19580101</enddate><creator>Gabbe, John D.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19580101</creationdate><title>Some Measurements of Atmospheric Neutrons</title><author>Gabbe, John D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c268t-6c7ff411dcc28934cd97b60a451f4fbc4bfc51efd88b86d361d3592fd479b5c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1958</creationdate><topic>ABSORPTION</topic><topic>ATMOSPHERE</topic><topic>BORON FLUORIDES</topic><topic>CADMIUM</topic><topic>COUNTERS</topic><topic>CROSS SECTIONS</topic><topic>DISTRIBUTION</topic><topic>ENERGY</topic><topic>ERRORS</topic><topic>GEOPHYSICS</topic><topic>GLASS</topic><topic>MEASURED VALUES</topic><topic>NEUTRON DETECTION</topic><topic>NEUTRONS</topic><topic>NUMERICALS</topic><topic>PHYSICS AND MATHEMATICS</topic><topic>POLYMERS</topic><topic>RADIATION DETECTORS</topic><topic>SHIELDING</topic><topic>SPECTRA</topic><topic>THICKNESS</topic><topic>TIN</topic><toplevel>online_resources</toplevel><creatorcontrib>Gabbe, John D.</creatorcontrib><creatorcontrib>New York Univ</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gabbe, John D.</au><aucorp>New York Univ</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Some Measurements of Atmospheric Neutrons</atitle><jtitle>Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D</jtitle><date>1958-01-01</date><risdate>1958</risdate><volume>112</volume><issue>2</issue><spage>497</spage><epage>502</epage><pages>497-502</pages><issn>0031-899X</issn><abstract>A series or airplane flights carrying neutron counters to an altitude of 700 g cm/sup -2/ was made at 52 20 north geomagnetic latitude in 1955. Enriched and normal BF/sub 3/ counters were covered with Cd, Sn, Pyrex, and limeglass shields. the ratios or the counting rates of the variously shielded counters are compared with the ratios calculated theoretically on a thick-shield basis using the neutron energy distribution function derived by Freese and Meyer. The neutron-production data taken by Davis and by Staker and Pyrex-glanss- envelope BF/sub 3/ counters are corrected for the absorption of neutrons by the boron in the Pyrex. The corrected neutron-production rates are recalculated to be 2.1 plus or minus 0.4 cm/sup -2/ sec/sup -1/ and 0.9 plus or minus 0.2 cm/ sup -2/ sec/sup -1/ at 54 36 and 30 24 north geomagnetic latitude, respectively, using recent values for the various neutron cross sections. These corrected rates agree, to within 5%, with the recent measurements reported by Soberman. The above energy distribution function was found, within the limited accuracy of the experiment, to describe the energy distribution of atmospheric neutrons. (auth)</abstract><doi>10.1103/PhysRev.112.497</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0031-899X |
| ispartof | Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, 1958-01, Vol.112 (2), p.497-502 |
| issn | 0031-899X |
| language | eng |
| recordid | cdi_crossref_primary_10_1103_PhysRev_112_497 |
| source | PROLA |
| subjects | ABSORPTION ATMOSPHERE BORON FLUORIDES CADMIUM COUNTERS CROSS SECTIONS DISTRIBUTION ENERGY ERRORS GEOPHYSICS GLASS MEASURED VALUES NEUTRON DETECTION NEUTRONS NUMERICALS PHYSICS AND MATHEMATICS POLYMERS RADIATION DETECTORS SHIELDING SPECTRA THICKNESS TIN |
| title | Some Measurements of Atmospheric Neutrons |
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