Search for Positronium Lyman α -radiation from Positrons Stopped in Inert Gases
An attempt to detect the positronium Lyman α -radiation at 2430 angstrom is reported. Positrons from an intense64Cu source (20 Ci) were stopped in high purity A, Ne, and He at pressures ranging from 0.01 to 3.0 atm. Light from the stopping region was collected by a large solid-angle light pipe and d...
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| Veröffentlicht in: | Proc. Nat. Acad. Sci. U. S. 66: 6-12(May 1970) 1970-05, Vol.66 (1), p.6-12 |
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| container_title | Proc. Nat. Acad. Sci. U. S. 66: 6-12(May 1970) |
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| creator | Leventhal, Marvin |
| description | An attempt to detect the positronium Lyman α -radiation at 2430 angstrom is reported. Positrons from an intense64Cu source (20 Ci) were stopped in high purity A, Ne, and He at pressures ranging from 0.01 to 3.0 atm. Light from the stopping region was collected by a large solid-angle light pipe and directed to a photomultiplier. Spectra were obtained by inserting a series of optical interference filters in front of the photomultiplier. Identical spectra were obtained with an intense electron emitter replacing the64Cu source. These results indicate that any Lyman α -radiation present at the photomultiplier is masked by a large background continuum associated with gas excitation processes. The data were employed to set an upper limit of 1 in 2000 on those positrons stopping in the gas which result in Lyman α -radiation. |
| doi_str_mv | 10.1073/pnas.66.1.6 |
| format | Article |
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Positrons from an intense64Cu source (20 Ci) were stopped in high purity A, Ne, and He at pressures ranging from 0.01 to 3.0 atm. Light from the stopping region was collected by a large solid-angle light pipe and directed to a photomultiplier. Spectra were obtained by inserting a series of optical interference filters in front of the photomultiplier. Identical spectra were obtained with an intense electron emitter replacing the64Cu source. These results indicate that any Lyman α -radiation present at the photomultiplier is masked by a large background continuum associated with gas excitation processes. The data were employed to set an upper limit of 1 in 2000 on those positrons stopping in the gas which result in Lyman α -radiation.</description><identifier>ISSN: 0027-8424</identifier><identifier>EISSN: 1091-6490</identifier><identifier>DOI: 10.1073/pnas.66.1.6</identifier><identifier>PMID: 16591834</identifier><language>eng</language><publisher>United States: National Academy of Sciences of the United States of America</publisher><subject>ABSORPTION ; Argon ; ARGON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from ; Atomic interactions ; Atoms ; COPPER 64 ; DETECTION ; ELECTRONS ; ENERGY LEVELS ; HELIUM ; HELIUM/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from ; HYDROGEN ; LYMAN LINES ; N32230 -Physics-Atomic & Molecular Physics-Positronium, Muonium, & Mesic Atoms & Molecules ; NEON ; NEON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from ; Optical filters ; Particle interactions ; Physical Sciences: Physics ; Positron annihilation ; POSITRONIUM ; POSITRONIUM/formation by positron stopping in inert gases, search for Lyman-$alpha$ radiation from ; POSITRONS ; POSITRONS/stopping in argon, helium, and neon at 0.01 to 3 atm, search for positronium Lyman-$alpha$ radiation from ; PRESSURE ; PRODUCTION ; SPECTRA ARGON ; Wavelengths</subject><ispartof>Proc. 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Nat. Acad. Sci. U. S. 66: 6-12(May 1970)</title><addtitle>Proc Natl Acad Sci U S A</addtitle><description>An attempt to detect the positronium Lyman α -radiation at 2430 angstrom is reported. Positrons from an intense64Cu source (20 Ci) were stopped in high purity A, Ne, and He at pressures ranging from 0.01 to 3.0 atm. Light from the stopping region was collected by a large solid-angle light pipe and directed to a photomultiplier. Spectra were obtained by inserting a series of optical interference filters in front of the photomultiplier. Identical spectra were obtained with an intense electron emitter replacing the64Cu source. These results indicate that any Lyman α -radiation present at the photomultiplier is masked by a large background continuum associated with gas excitation processes. The data were employed to set an upper limit of 1 in 2000 on those positrons stopping in the gas which result in Lyman α -radiation.</description><subject>ABSORPTION</subject><subject>Argon</subject><subject>ARGON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</subject><subject>Atomic interactions</subject><subject>Atoms</subject><subject>COPPER 64</subject><subject>DETECTION</subject><subject>ELECTRONS</subject><subject>ENERGY LEVELS</subject><subject>HELIUM</subject><subject>HELIUM/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</subject><subject>HYDROGEN</subject><subject>LYMAN LINES</subject><subject>N32230 -Physics-Atomic & Molecular Physics-Positronium, Muonium, & Mesic Atoms & Molecules</subject><subject>NEON</subject><subject>NEON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</subject><subject>Optical filters</subject><subject>Particle interactions</subject><subject>Physical Sciences: Physics</subject><subject>Positron annihilation</subject><subject>POSITRONIUM</subject><subject>POSITRONIUM/formation by positron stopping in inert gases, search for Lyman-$alpha$ radiation from</subject><subject>POSITRONS</subject><subject>POSITRONS/stopping in argon, helium, and neon at 0.01 to 3 atm, search for positronium Lyman-$alpha$ radiation from</subject><subject>PRESSURE</subject><subject>PRODUCTION</subject><subject>SPECTRA ARGON</subject><subject>Wavelengths</subject><issn>0027-8424</issn><issn>1091-6490</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1970</creationdate><recordtype>article</recordtype><recordid>eNp10c1u1DAUBWALgehQWLFjgSxYsEAZrmPHPwsWqGpLpZGoVFhbjuMwrhI72A6ij8WL8ExkNEMHFqy8ON-5vtJF6DmBNQFB303B5DXna7LmD9CKgCIVZwoeohVALSrJanaCnuR8CwCqkfAYnRDeKCIpW6HrG2eS3eI-Jnwdsy8pBj-PeHM3moB__cRVMp03xceA-xTHe5TxTYnT5DrsA74KLhV8abLLT9Gj3gzZPTu8p-jLxfnns4_V5tPl1dmHTWUZ1KXizkkqgUsgzDVSdC3lvG1kZ1ujLFVSWNX1Epqe2bZmHfCOtqJpuHG8rklLT9H7_dxpbkfXWRdKMoOekh9NutPReP1vEvxWf43fdS05CLX0X-37MRevs_XF2a2NIThbNCOUgYIFvTl8kuK32eWiR5-tGwYTXJyzFpQyxQTIRb7dS5tizsn195sQ0Lsz6d2ZNOeaaL7ol38vf7SHuyzg9QHsWn_ifVv38zAU96Ms6sV_1TG8zSWmYwpEcPobFyauhw</recordid><startdate>19700501</startdate><enddate>19700501</enddate><creator>Leventhal, Marvin</creator><general>National Academy of Sciences of the United States of America</general><general>National Acad Sciences</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope><scope>5PM</scope></search><sort><creationdate>19700501</creationdate><title>Search for Positronium Lyman α -radiation from Positrons Stopped in Inert Gases</title><author>Leventhal, Marvin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c402t-6ee838068014e587db366b58dcba9c3987c9df805f4cb24d06d3b7556ae6221b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1970</creationdate><topic>ABSORPTION</topic><topic>Argon</topic><topic>ARGON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</topic><topic>Atomic interactions</topic><topic>Atoms</topic><topic>COPPER 64</topic><topic>DETECTION</topic><topic>ELECTRONS</topic><topic>ENERGY LEVELS</topic><topic>HELIUM</topic><topic>HELIUM/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</topic><topic>HYDROGEN</topic><topic>LYMAN LINES</topic><topic>N32230 -Physics-Atomic & Molecular Physics-Positronium, Muonium, & Mesic Atoms & Molecules</topic><topic>NEON</topic><topic>NEON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from</topic><topic>Optical filters</topic><topic>Particle interactions</topic><topic>Physical Sciences: Physics</topic><topic>Positron annihilation</topic><topic>POSITRONIUM</topic><topic>POSITRONIUM/formation by positron stopping in inert gases, search for Lyman-$alpha$ radiation from</topic><topic>POSITRONS</topic><topic>POSITRONS/stopping in argon, helium, and neon at 0.01 to 3 atm, search for positronium Lyman-$alpha$ radiation from</topic><topic>PRESSURE</topic><topic>PRODUCTION</topic><topic>SPECTRA ARGON</topic><topic>Wavelengths</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Leventhal, Marvin</creatorcontrib><creatorcontrib>Yale Univ., New Haven</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Proc. Nat. Acad. Sci. U. S. 66: 6-12(May 1970)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Leventhal, Marvin</au><aucorp>Yale Univ., New Haven</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Search for Positronium Lyman α -radiation from Positrons Stopped in Inert Gases</atitle><jtitle>Proc. Nat. Acad. Sci. U. S. 66: 6-12(May 1970)</jtitle><addtitle>Proc Natl Acad Sci U S A</addtitle><date>1970-05-01</date><risdate>1970</risdate><volume>66</volume><issue>1</issue><spage>6</spage><epage>12</epage><pages>6-12</pages><issn>0027-8424</issn><eissn>1091-6490</eissn><abstract>An attempt to detect the positronium Lyman α -radiation at 2430 angstrom is reported. Positrons from an intense64Cu source (20 Ci) were stopped in high purity A, Ne, and He at pressures ranging from 0.01 to 3.0 atm. Light from the stopping region was collected by a large solid-angle light pipe and directed to a photomultiplier. Spectra were obtained by inserting a series of optical interference filters in front of the photomultiplier. Identical spectra were obtained with an intense electron emitter replacing the64Cu source. These results indicate that any Lyman α -radiation present at the photomultiplier is masked by a large background continuum associated with gas excitation processes. The data were employed to set an upper limit of 1 in 2000 on those positrons stopping in the gas which result in Lyman α -radiation.</abstract><cop>United States</cop><pub>National Academy of Sciences of the United States of America</pub><pmid>16591834</pmid><doi>10.1073/pnas.66.1.6</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Proc. Nat. Acad. Sci. U. S. 66: 6-12(May 1970), 1970-05, Vol.66 (1), p.6-12 |
| issn | 0027-8424 1091-6490 |
| language | eng |
| recordid | cdi_pnas_primary_66_1_6_fulltext |
| source | Jstor Complete Legacy; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | ABSORPTION Argon ARGON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from Atomic interactions Atoms COPPER 64 DETECTION ELECTRONS ENERGY LEVELS HELIUM HELIUM/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from HYDROGEN LYMAN LINES N32230 -Physics-Atomic & Molecular Physics-Positronium, Muonium, & Mesic Atoms & Molecules NEON NEON/positron stopping at 0.01 to 3 atm in, search for positronium Lyman-$alpha$ radiation from Optical filters Particle interactions Physical Sciences: Physics Positron annihilation POSITRONIUM POSITRONIUM/formation by positron stopping in inert gases, search for Lyman-$alpha$ radiation from POSITRONS POSITRONS/stopping in argon, helium, and neon at 0.01 to 3 atm, search for positronium Lyman-$alpha$ radiation from PRESSURE PRODUCTION SPECTRA ARGON Wavelengths |
| title | Search for Positronium Lyman α -radiation from Positrons Stopped in Inert Gases |
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