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El agotamiento isomérico como evidencia experimental de la excitación nuclear por captura de electrones

C J Chiara¹, J J Carroll², M P Carpenter³

¹Oak Ridge Associated Universities Fellowship Program, US Army Research Laboratory, Adelphi, Maryland 20783, USA.

|February 9, 2018

Resumen

Se observa por primera vez la excitación nuclear por captura de electrones (NEEC), lo que proporciona datos cruciales para los modelos teóricos. Este hallazgo tiene implicaciones para la comprensión de los procesos nucleares en entornos estelares y el agotamiento de isómeros.

Área de la Ciencia:

Física nuclear
Física atómica
La astrofísica

Sus antecedentes:

Los núcleos atómicos y los electrones interactúan, lo que lleva a fenómenos como la conversión interna.
La excitación nuclear por captura de electrones (NEEC) es un proceso inverso predicho pero no observado.
NEEC implica capturar un electrón libre en una vacante atómica para excitar el núcleo.

Objetivo del estudio:

Proporcionar la primera evidencia experimental de la excitación nuclear por captura de electrones (NEEC).
Para determinar la probabilidad y la sección transversal del proceso NEEC.
Establecer una norma para la evaluación de los modelos teóricos de las NEEC.

Principales métodos:

Observación experimental del NEEC en el molibdeno 93.
Utilizando una configuración experimental basada en rayos.
Medir la probabilidad y la sección transversal del proceso NEEC.

Principales resultados:

Se obtuvieron pruebas experimentales de excitación nuclear por captura de electrones (NEEC).
Se determinó la probabilidad y la sección transversal de NEEC en molibdeno-93.
Los resultados sirven como punto de referencia para las predicciones teóricas de las NEEC.

Conclusiones:

La confirmación experimental de NEEC abre nuevas vías para la investigación en física nuclear.
NEEC puede influir en la abundancia de isótopos en la nucleosíntesis estelar a través del agotamiento de isómeros.
Este trabajo valida las predicciones teóricas y proporciona una base para estudios futuros.

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