From Nuclei to Neutrinos
The Naming of the
Denys Wilkinson Building
21 June 2002
Nick Jelley
dd
29 MeV 3He on 14N1962
The Optical Model
10 100 MeV
p 3Hd
3He4He
Particle Identification
E E
Particle Identification
40 MeV protons on carbon1967
p
d
3H4He
114 MeV 12C beam on carbon1974
Selectivity in Heavy-Ion Reactions
Excitation Probability
High Spin
Low Spin
114 MeV 12C and 11B beams on carbon
40Ca(16O,2np)53Com
Radioactivity
49 MeV 16O beam on calcium1970
53Com
245 ms half-life
Proton
Discovery of 14C radioactivity1984
E-E telescope
Alpha-decay of Heavy Nuclei1990
Geiger-Nuttall Plots
14C dating
Nature1978
14C
13C
14C13C
modern
old
The Oxford Microprobe 1986
p-induced X-rays
Magnetic Moments of Excited States 198419F + 1H 16O* +
6.13 MeV 3
g0.556(4)
0o
90o
6.13 MeVstopped flight
19F
foil stopper
0o
90o
16O
1+ 13.19 MeV 20Ne 16Ogs
11.26 MeV
Parity Violation 1957 1983
decay of 8Li and 8B: The Second-Class Current Problem
19718B 8Be* + e+ + 8Li 8Be* + e +
second-class current gIT = 2.103
|gIT | < 7.104
8B 8Be* + e+ +
Solar Neutrinos
Sudbury Neutrino Observatory
Reactions in SNO
-Good measurement of e energy spectrum-Weak directional sensitivity 1-1/3cos()
-Measure total 8B flux from the sun.
NCxx
npd
ES -- eνeν x x
-Low Statistics-Strong directional sensitivity
CC-eppd e
e only
Equal cross sectionfor all types
All types butenhanced sensitivity to e
Signal Extraction Results
CC 1967.7 +61.9 +60.9
+26.4 +25.6ES 263.6
+49.5 +48.9NC 576.5
SNO CC SNO NC
1
2
3
4
5
6
7
Standard Solar Model
flux
1/3 SSM
SNO Results 2002
5.3
106 cm-2 s-1
Flavour Oscillations
Oscillations before SNO
Combining All Experimentaland Solar Model information
after