[Isac-journal-club] Journal club today at 3:30

[Ragnar Stroberg]

Reminder: we start in half an hour.

On Wed, Apr 26, 2017 at 10:50 AM Ragnar Stroberg <sstroberg at triumf.ca>
wrote:

> Hi all,
>
> Here's a reminder that we're holding a journal club meeting at 3:30 in the
> MOB theory room.
>
> Details are reprinted below.
>
> See you there,
>
> -Ragnar
>
> The paper for this week is from the arxiv
>
> https://arxiv.org/abs/1704.03785
>
> (it's not yet published but it has obviously been submitted to PRL).
>
> *Title:* Where is the neutron drip line for oxygen?
>
> *Some questions to consider when reading:*
> 1) What question are they trying to answer (if you can't figure this one
> out, you're not trying.)
> 2) What approach do they take, and what physics are they trying to
> incorporate that might not be in previous treatments?
> 3) Would you consider this approach phenomenological or ab initio?
>
> *Helpful background:*
> 1) Neutron dripline: the heaviest isotope of a given element which is
> stable with respect to the emission of one or multiple neutrons.
> 2) History: the dripline of the oxygen at mass 24, is much lighter than
> was naively expected, especially considering that oxygen has a magic number
> of protons (Z=8). TRIUMF's very own Jason Holt provided an explanation of
> this anomaly by including the effects of 3-body forces. The existence of
> oxygen 28 has not yet been experimentally established.
> 3) Berggren basis: a single-particle basis consisting of bound, resonant,
> and continuum states.
> 4) Gamow Shell Model: a shell model calculation that uses the Berggren
> basis
>
>
> *Questions for discussion:*
> 1) When fitting 7 parameters to 7 or 8 observables, the obvious danger is
> overfitting. Do they make a compelling case that they aren't overfitting?
> 2) Are 3-body forces taken into account?
> 3) Does this study provide additional insight as to the location of the
> neutron drip line?
>
>
> --
> Ragnar Stroberg
> Postdoctoral research associate
> Theory Department
> TRIUMF
> (604)-222-1047 x 6446
>
> --
Ragnar Stroberg
Postdoctoral research associate
Theory Department
TRIUMF
(604)-222-1047 x 6446
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