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Los límites del paisaje nuclear
Jochen Erler1, Noah Birge, Markus Kortelainen
1Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Nature
|June 29, 2012
Resumen
Los científicos estiman los límites del paisaje nuclear, prediciendo alrededor de 7.000 núcleos unidos. Esta investigación proporciona incertidumbres cruciales para los procesos de unión nuclear y astrofísica.
Área de la Ciencia:
- Física nuclear es la física nuclear.
- La astrofísica es la astrofísica.
Sus antecedentes:
- Existen aproximadamente 3.000 núcleos conocidos, de los cuales 100 fueron descubiertos en 2011.
- La tabla de nucleidos está definida por "líneas de goteo" que indican los límites de la unión nuclear.
- Las predicciones actuales para las líneas de goteo de elementos pesados son inciertas, con límites desconocidos en los protones y neutrones unidos.
Objetivo del estudio:
- Para estimar los límites del paisaje nuclear.
- Proporcionar incertidumbres estadísticas y sistemáticas para las predicciones de núcleos unidos.
- Evaluar la consistencia de los modelos teóricos para las propiedades nucleares.
Principales métodos:
- Teoría funcional de la densidad nuclear.
- Las múltiples interacciones de Skyrme.
- Computación de alto rendimiento de alto rendimiento.
Principales resultados:
- Se estima que alrededor de 7.000 núcleos unidos para elementos con 2 a 120 protones.
- Extrapolaciones consistentes para las posiciones de la línea de goteo en diferentes modelos.
- Predicciones consistentes para las propiedades nucleares, incluidas las energías de separación de neutrones.
Conclusiones:
- El estudio proporciona una estimación más precisa de los límites del paisaje nuclear.
- Las predicciones para las posiciones de la línea de goteo y las propiedades nucleares muestran una alta consistencia entre los modelos teóricos.
- Los hallazgos son relevantes para la comprensión de los procesos astrofísicos que involucran energías de separación de neutrones.
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