USANDO MOMENTOS MAGNÉTICOS PARA DEVELAR LA ESTRUCTURA NUCLEAR A BAJO ESPÍN
USING MAGNETIC MOMENTS TO UNVEIL THE NUCLEAR STRUCTURE OF LOW-SPIN NUCLEAR STATES
Keywords:
Factores g, tiempos de vida, reacciones de transferencia α, cinemática inversa, campo transiente, DSAM. (es)g factors, Lifetimes, α-transfer reaction, Inverse kinematics, Transient field, DSAM (en)
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El estudio experimental de momentos magnéticos en estados nucleares cercanos al estado base, con momentum angular total (o espín) I ≤ 2, proporciona una poderosa herramienta para contrastar modelos que tratan de describir la estructura nuclear. Tradicionalmente, excitaciones de Coulomb han sido utilizadas para el estudio de estados a bajo espín, principalmente I = 2. El uso de canales de reacción alternos, tales como reacciones de transferencia de partículas α, para la producción de isótopos radiactivos que, de otra forma, solo podrán ser producidas en arreglos experimentales futuros, han demostrado ser una alternativa para medir no solamente estados excitados con I>2, sino que además permiten poblar y estudiar núcleos radiactivos con tiempos de vida largos. Esté trabajo presentará las herramientas experimentales y los retos existentes en la medición de factores g haciendo uso de la denominada "Técnica de Campo Trasiente", para estados nucleares con I ≤ 2, haciendo uso de reacciones de Coulomb y de transferencia de partículas α. Se mostrarán algunos resultados experimentales recientes en núcleos en los alrededores de un número de neutrones N = 50 (capa cerrada), y se discutirán las dificultades experimentales existentes en la futura implementación de la técnica en arreglos experimentales que harán uso de haces radiactivos.
The experimental study of magnetic moments for nuclear states near the ground state, I ≤ 2, provides a powerful tool to test nuclear structure models. Traditionally, the use of Coulomb excitation reactions has been used to study low spin states, mostly I = 2. The use of alternative reaction channels, such as α transfer, for the production of radioactive species that, otherwise, will be only produced in future radioactive beam facilities has proved to be an alternative to measure not only excited states with I > 2, but to populate and study long-live radioactive nuclei. This contribution will present the experimental tools and challenges for the use of the transient field technique for the measurement of g factors in nuclear states with I ≤ 2, using Coulomb excitation and α-transfer reactions. Recent examples of experimental results near the N = 50 shell closure, and the experimental challenges for future implementations with radioactive beams, will be discussed.
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