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Producción selectiva de electrones lentos en el sitio y la energía a través de la desintegración intermolecular
Kirill Gokhberg1, Přemysl Kolorenč2, Alexander I Kuleff1
1Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany.
Nature
|December 24, 2013
Resumen
Este estudio demuestra el control de la emisión de electrones durante el decaimiento Coulombic intermolecular (ICD) acoplándolo con la excitación del núcleo resonante. Este método permite ajustar la energía y el sitio de los electrones emitidos, impactando la biología de la radiación y la espectroscopia.
Área de la Ciencia:
- Física atómica y molecular Física atómica y molecular
- Química cuántica es la química cuántica.
- La espectroscopia es una técnica de espectroscopia.
Sus antecedentes:
- La irradiación de luz excita los átomos / moléculas, con la relajación que determina la deposición de energía y la producción de iones / electrones.
- La desintegración coulombina intermolecular (ICD) relaja eficientemente la excitación electrónica en sistemas débilmente unidos mediante la transferencia de energía a los vecinos, causando ionización.
Objetivo del estudio:
- Proponer y demostrar el control sobre el sitio de emisión de electrones y la energía durante el ICD.
- Para investigar el acoplamiento del ICD con la excitación del núcleo resonante para la emisión de electrones sintonizables.
Principales métodos:
- Utilizado ab initio cálculos de muchos cuerpos.
- Modelado el sistema argón-criptón.
- Simulación de la fotoabsorción de resonancia y posterior cascada de resonancia-Auger-ICD.
Principales resultados:
- Se demostró que la excitación del núcleo resonante puede desencadenar una cascada de ICD.
- Se demostró que la energía de los electrones emitidos es sensible al estado excitado inicial.
- Se ha confirmado la emisión de electrones sintonizables de Krypton en el sistema Argon-Krypton.
Conclusiones:
- El acoplamiento del ICD con la excitación del núcleo resonante ofrece control sobre la energía y el sitio de los electrones emitidos.
- Este control tiene aplicaciones potenciales en biología de la radiación y técnicas espectroscópicas avanzadas.
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