Clustering and alpha-capture reaction rate from ab initio symmetry-adapted descriptions of Ne-20
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00534265" target="_blank" >RIV/61389005:_____/20:00534265 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.102.044608" target="_blank" >https://doi.org/10.1103/PhysRevC.102.044608</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.102.044608" target="_blank" >10.1103/PhysRevC.102.044608</a>
Alternative languages
Result language
angličtina
Original language name
Clustering and alpha-capture reaction rate from ab initio symmetry-adapted descriptions of Ne-20
Original language description
We introduce a new framework for studying clustering and for calculating alpha partial widths using ab initio wave functions. We demonstrate the formalism for Ne-20, by calculating the overlap between the O-16 + alpha cluster configuration and states in Ne-20 computed in the ab initio symmetry-adapted no-core shell model. We present spectroscopic amplitudes and spectroscopic factors, and compare those to no-core symplectic shell-model results in larger model spaces, to gain insight into the underlying physics that drives alpha clustering. Specifically, we report on the alpha partial width of the lowest 1- resonance in Ne-20, which is found to be in good agreement with experiment. We also present first no-core shell-model estimates for asymptotic normalization coefficients for the ground state, as well as for the first excited 4(+) state in Ne-20 that lies in a close proximity to the alpha + O-16 threshold. This outcome highlights the importance of correlations for developing cluster structures and for describing alpha widths. The widths can then be used to calculate alpha-capture reaction rates for narrow resonances of interest to astrophysics. We explore the reaction rate for the alpha-capture reaction O-16(alpha, gamma)Ne-20 at astrophysically relevant temperatures and determine its impact on simulated x-ray burst abundances.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/GA16-16772S" target="_blank" >GA16-16772S: Development of symmetry-guided methods for first principle modeling of medium-mass atomic nuclei</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review C
ISSN
2469-9985
e-ISSN
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Volume of the periodical
102
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
044608
UT code for WoS article
000579097700008
EID of the result in the Scopus database
2-s2.0-85094161979