Subject: Re: MINUTES -- 18F(p,g) addendum

18F(p,g) re-examined. Alison/Jonty's original proposal was to measure 
several resonance strengths in nova region, and also look for interference 
effects between 3/2+ resonances. Some of the lower energy resonances 
(287,330 keV) may have problems with cone angle, but probably cascade. 
Since that proposal, three major things have happened:
1. 8keV 3/2+ resonance, analogue state in 19F was measured to have 
a very small s-wave strength, thus limit put on width, thus unlikely to 
interfere with higher 3/2+ state.
2. Re-analysis of 15N(a,a) data shows incorrect analogue assignment for 
665 keV 3/2+ resonance. Previously thought to be 7.100 MeV in 19F, now 
thought to be 7.262 MeV. As a consequence, Gamma_gamma is now unknown, and 
therefore omegagamma. 
3. Discovery of l=0 states in 19F higher than this leads to possibility of 
l=0 resonances in 19Ne above 665 keV. One of these was seen in elastic 
scattering at Oak Ridge at 1 MeV. 

From Iliadis, for nova greater than 0.4GK, 18F(p,g) is only ten times less 
sensitive than the (p,a) for 18F abundance changes. 

CR will add some work to proposal then give to A Laird for final touches. 
Should have draft by next week.