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From Nuclei to Neutrinos The Naming of the Denys Wilkinson Building 21 June 2002 Nick Jelley
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d d 29 MeV 3 He on 14 N 1962 The Optical Model
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10 100 MeV p 3H3H d 3 He 4 He Particle Identification EE E
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40 MeV protons on carbon 1967 p d 3H3H 4 He 114 MeV 12 C beam on carbon 1974
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Selectivity in Heavy-Ion Reactions Excitation Probability High Spin Low Spin 114 MeV 12 C and 11 B beams on carbon
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40 Ca( 16 O,2np) 53 Co m Radioactivity 49 MeV 16 O beam on calcium 1970 53 Co m 245 ms half-life Proton
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Discovery of 14 C radioactivity 1984 E-E telescope
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Alpha-decay of Heavy Nuclei 1990 Geiger-Nuttall Plots
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14 C dating Nature 1978 14 C 13 C 14 C 13 C modern old
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The Oxford Microprobe 1986 p-induced X-rays
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Magnetic Moments of Excited States 1984 19 F + 1 H 16 O * + 6.13 MeV 3 g 0.556(4) 0o0o 90 o 6.13 MeV stopped flight 19 F foilstopper 0o0o 90 o 16 O
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1 + 13.19 MeV 20 Ne 16 O gs 11.26 MeV Parity Violation 1957 1983
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decay of 8 Li and 8 B: The Second-Class Current Problem 1971 8 B 8 Be * + e + + 8 Li 8 Be * + e + second-class current g IT = 2.10 3 |g IT | < 7.10 4
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8 B 8 Be * + e + + Solar Neutrinos
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Sudbury Neutrino Observatory
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Reactions in SNO -Good measurement of e energy spectrum -Weak directional sensitivity 1-1/3cos( ) -Measure total 8 B flux from the sun. NC xx npd ES -- eνeν xx -Low Statistics -Strong directional sensitivity CC - eppd e e only Equal cross section for all types All types but enhanced sensitivity to e
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A Neutrino Event
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Signal Extraction Results CC1967.7 +61.9 +60.9 +26.4 +25.6 ES 263.6 +49.5 +48.9 NC 576.5
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SNO CCSNO NC 1 2 3 4 5 6 7 Standard Solar Model flux 1/3 SSM SNO Results 2002 5.3 10 6 cm -2 s -1
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Flavour Oscillations Oscillations before SNO Combining All Experimental and Solar Model information after
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