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From Nuclei to Neutrinos The Naming of the Denys Wilkinson Building 21 June 2002 Nick Jelley.

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Presentation on theme: "From Nuclei to Neutrinos The Naming of the Denys Wilkinson Building 21 June 2002 Nick Jelley."— Presentation transcript:

1 From Nuclei to Neutrinos The Naming of the Denys Wilkinson Building 21 June 2002 Nick Jelley

2 d  d  29 MeV 3 He on 14 N 1962 The Optical Model

3 10 100 MeV p 3H3H d 3 He 4 He Particle Identification EE E

4 40 MeV protons on carbon 1967 p d 3H3H 4 He 114 MeV 12 C beam on carbon 1974

5 Selectivity in Heavy-Ion Reactions Excitation Probability High Spin Low Spin 114 MeV 12 C and 11 B beams on carbon

6 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

7 Discovery of 14 C radioactivity 1984  E-E telescope

8 Alpha-decay of Heavy Nuclei 1990 Geiger-Nuttall Plots

9 14 C dating Nature 1978 14 C 13 C 14 C 13 C modern old

10 The Oxford Microprobe 1986 p-induced X-rays 

11 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

12 1 + 13.19 MeV 20 Ne  16 O gs 11.26 MeV Parity Violation 1957 1983

13  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

14 8 B  8 Be * + e + + Solar Neutrinos

15 Sudbury Neutrino Observatory

16 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

17 A Neutrino Event

18 Signal Extraction Results CC1967.7 +61.9 +60.9 +26.4 +25.6 ES 263.6 +49.5 +48.9 NC 576.5

19 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

20 Flavour Oscillations Oscillations before SNO Combining All Experimental and Solar Model information after


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