nuclear data for nuclear astrophysicsfribastro.org/2_MEETINGS/08_12/smith.pdf · nuclear data for nuclear astrophysics michael smith ornl Nuclear Astrophysics Data Status - Challenges

nuclear data for nuclear astrophysics michael smith ornl

1 nuclear data for nuclear astrophysics

Michael Smith ORNL Physics Division


2 Workshop Questions

•  What will facilities / theoretical developments / organizational initiatives in nuclear data be able to do for nuclear astro in the next 10 years?

•  Is nuclear data in good shape for the FRIB era? What are needs?

•  How can we better connect the astro & nuclear communities ?

•  What are potential synergies of nuclear astrophysics data with other areas ?

•  What are possible next steps / organization ?


3 Nuclear Astrophysics Data Status - Positives

•  some terrific investigator-led efforts !



•  online resources are continually expanding & improving •  JINA REACLIB – now at version 2

•  UNC STARLIB – new resource with rate uncertainties

•  KADONIS – still going strong

•  MESA – NUGRID project

•  JINA R-matrix code

•  WEBNUCLEO at Clemson

•  Computational Infrastructure – combines tools for rates and simulations, JINA REACLIB v2, sharing of libraries / simulations, simulation analysis

•  bigbangonline.org – Monte Carlo BBN calculations online

•  NACRE, LLNL, ULB/NETGEN, LANL T2, Tommy Rauscher, LBNL, TUNL A<20…

•  LLNL NADS

•  nuclearmasses.org – sharing / viz of evaluated / experimental / theoretical masses

•  NNDC MACS



•  Community Interest •  recent NIC tutorials [Cyburt] •  mini-workshop Fall 2011 [NNDC & JINA]

•  USNDP / NNDC interest in this work •  MACS project - Boris Pritychencko

•  Astro Task Force to encourage collaborative work


6 Nuclear Astrophysics Data Status - Challenges

•  USNDP / NNDC has insufficient resources for a substantial evaluation effort dedicated to nuclear astrophysics

•  a community evaluation initiative in 2007 had some interest – and now has dedicated software tools – but never got started

•  evaluations are key ! critical assessment of all data on a reaction / nuclide

•  evaluations are not keeping pace with measurements



•  important reactions from the 2007 Trento meeting



•  PI-led efforts often suffer from low manpower, significant turnover, modest scope, little funding, little institutional recognition

•  lack of interest / respect by many in both nuclear and astro field

•  evaluations generally seen as a responsibility for “others” – instead of being integrated with measurements & theory work


9 Nuclear Astrophysics Data Status - Challenges masses of 48 unstable nuclides just measured with CPT at ANL CARIBU

FRIB

– USNDP initiative on evaluations of data on unstable nuclei

132Sb+ isomeric and ground states

– USNDP funding for data center at FRIB

– expansion in manpower / features of XUNDL (latest unevaluated data) – large community-based evaluation initiative [restart 2007 effort] – single PI evaluation initiatives

•  Rapidly increasing amounts of data on unstable nuclei in the FRIB era •  Possible strategies to handle evaluations / disseminations


10 Nuclear Astrophysics Data – Possible Strategies

•  “Restart” the community evaluation effort that was discussed in 2007 in Trento

•  Explore the possibility of creating a new USNDP Center at FRIB

•  fallback option – USNDP evaluation effort on unstable nuclei


11 Nuclear Astrophysics Data – Possible Strategies

•  software solutions to help with compilation / dissemination – data harvesting

– customizable visualization tools – running codes – nuclear and astro simulation – online “in the cloud”

retrieve info from international databases

get data

– evaluation templates and workflow helpers – do more with less


12 Nuclear Astrophysics Data – Connections

•  simulation studies are a natural way to connect three communities – nuclear physics (experimental & theoretical) – nuclear data – astrophysics

•  modelers running simulations often – drive improvements in nuclear data libraries

– are appreciative of nuclear data efforts – work closely with experimentalists / evaluators

•  suggest to reach out to modelers for any future data efforts


13 Nuclear Astrophysics Data – attitudes & training

•  IF evaluations (partial / streamlined) can be integrated with measurement work by MANY in the community communities

THEN there is a hope to evaluations to keep up with measurements – advantage: a portion of the work is typically already done, just a few more steps… – advantage: doesn’t really need extra funding, just a willingness to do it

– disadvantages: bias toward new experiment, sometimes lack of familiarity …

•  requires PIs to familiarize the next generation of nuclear scientists with nuclear data tools, approaches, online resources

– presentations / training sessions at schools example: Exotic Beam Summer School 2012 – lecture by Filip Kondev – technical workshops on evaluations / tools / resources – the PIs also need relevant exposure !


14 Summary

•  What will facilities / theoretical developments / organizational initiatives in nuclear data be able to do for nuclear astro in the next 10 years?

•  Is nuclear data in good shape for the FRIB era? What are needs?

•  How can we better connect the astro & nuclear communities ?

•  What are potential synergies of nuclear astrophysics data with other areas ?

•  needs: EVALUTIONS !

•  community-led initiatives have promise … but need a push

•  explore synergies with observational databases

•  simulation efforts naturally connect nuclear / data / astro communities

•  PI-led initiatives will play a strong role •  an FRIB data center could really help

•  evaluations fall far short of needs – will be magnified by FRIB

•  What are possible next steps / organization ? •  community-led evaluation initiative •  an FRIB data center

•  great online resources and small evaluation efforts

•  attitude / training •  software assistants

nuclear data for nuclear astrophysicsfribastro.org/2_MEETINGS/08_12/smith.pdf · nuclear data for nuclear astrophysics michael smith ornl Nuclear Astrophysics Data Status - Challenges

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