[Bubble] competitors

[Ugalde, Claudio]

Dear Jay,
Do you know if this has been published? We have known this for quite some time, so I am surprised. Now, the problem with going with higher energies is that you get out of the astrophysical region and there are quite some experiments below the GDR.
Claudio



On Sep 8, 2014, at 1:30 PM, Jay Benesch wrote:

> http://arxiv.org/abs/1409.1655
> 
> Photoelectric disintegration of 16O
> M. Katsuma
> (Submitted on 5 Sep 2014)
> 
>     The photoelectric cross section of 
> $^{16}$O($\gamma$,$\alpha$)$^{12}$C is estimated to be larger than the 
> radiative capture cross section of $^{12}$C($\alpha$ ,$\gamma$)$^{16}$O. 
> The predicted cross section and the angular distribution of 
> $\alpha$-particle are illustrated for the future experiment. The cross 
> section just above the $\alpha$-particle threshold is found to be 
> dominated by the $E$2 excitation.
> 
> ------------------
> The calculation suggests we ought to try for higher energy photons, 
> since cross-section will increase very fast.  References 2 and 12 speak 
> to competitors of our experiment.  The new dipole is good to ~15 MeV/c 
> with a 10A trim card.  Recovery rate of the bubble chamber will limit 
> data rate.
> 
> Jay
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