The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 35
... helium isotope with mass 4 , helium - 4 ) the nu- imately 1/137 is obtained . cleus obeys Bose - Einstein statistics ... 3 , helium - 3 ) it obeys Fermi - Dirac statistics . be hundreds of times stronger than electrical forces ...
... helium isotope with mass 4 , helium - 4 ) the nu- imately 1/137 is obtained . cleus obeys Bose - Einstein statistics ... 3 , helium - 3 ) it obeys Fermi - Dirac statistics . be hundreds of times stronger than electrical forces ...
Page 321
... 3. The inner vessel can be titanium By courtesy of the Garrett Corp. capacity sensor heater leads vent port -vapour ... helium , and neon can be efficiently trapped . By cooling from 11 ° to 20 ° K , hydrogen can be trapped ; and at the ...
... 3. The inner vessel can be titanium By courtesy of the Garrett Corp. capacity sensor heater leads vent port -vapour ... helium , and neon can be efficiently trapped . By cooling from 11 ° to 20 ° K , hydrogen can be trapped ; and at the ...
Page 503
... helium - 3 ( 3He ) man - made primordial 16 X 106 beta - minus xenon - 129 ( 129Xe ) radiogenic 22 beta - minus bismuth - 2101 ( 210 Bi ) ; ultimately to lead - 206 primordial 36 X 109 ( ? ) beta - minus hafnium - 176 ( 176Hf ) ...
... helium - 3 ( 3He ) man - made primordial 16 X 106 beta - minus xenon - 129 ( 129Xe ) radiogenic 22 beta - minus bismuth - 2101 ( 210 Bi ) ; ultimately to lead - 206 primordial 36 X 109 ( ? ) beta - minus hafnium - 176 ( 176Hf ) ...
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activity American animals appear areas authority become body called cause cells central century charge common complex conservation consists constant constitution consumer contain continental continued copper cosmic rays countries court crime criminal Crusade direct early effect electron elements energy England established Europe evidence example exist fact field force ground groups House important increase individual industrial involved Italy known land later less letters limited living major material means measure ment metal natural occur organic original particles particular party percent period person play political population position present problems protection reefs region remains result rule social South species structure theory tion United usually various