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1.
Appl Phys B ; 128(3): 39, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35221544

RESUMO

We present the results of the calibration of a channeltron-based electrostatic analyzer operating in time-of-flight mode (ESA-ToF) using tin ions resulting from laser-produced plasma, over a wide range of charge states and energies. Specifically, the channeltron electron multiplier detection efficiency and the spectrometer resolution are calibrated, and count rate effects are characterized. With the obtained overall response function, the ESA-ToF is shown to accurately reproduce charge-integrated measurements separately and simultaneously obtained from a Faraday cup (FC), up to a constant factor the finding of which enables absolute cross-calibration of the ESA-ToF using the FC as an absolute benchmark. Absolute charge-state-resolved ion energy distributions are obtained from ns-pulse Nd:YAG-laser-produced microdroplet tin plasmas in a setting relevant for state-of-the-art extreme ultraviolet nanolithography.

2.
Nat Commun ; 11(1): 2334, 2020 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-32393789

RESUMO

Extreme ultraviolet (EUV) lithography is currently entering high-volume manufacturing to enable the continued miniaturization of semiconductor devices. The required EUV light, at 13.5 nm wavelength, is produced in a hot and dense laser-driven tin plasma. The atomic origins of this light are demonstrably poorly understood. Here we calculate detailed tin opacity spectra using the Los Alamos atomic physics suite ATOMIC and validate these calculations with experimental comparisons. Our key finding is that EUV light largely originates from transitions between multiply-excited states, and not from the singly-excited states decaying to the ground state as is the current paradigm. Moreover, we find that transitions between these multiply-excited states also contribute in the same narrow window around 13.5 nm as those originating from singly-excited states, and this striking property holds over a wide range of charge states. We thus reveal the doubly magic behavior of tin and the origins of the EUV light.

3.
Rev. chil. obstet. ginecol ; 78(6): 441-446, 2013. tab
Artigo em Espanhol | LILACS | ID: lil-702350

RESUMO

Antecedentes: El cáncer de endometrio es uno de los cánceres ginecológicos más frecuentes. La incidencia de esta enfermedad pudiera ir en aumento dado los cambios epidemiológicos de la población femenina. Objetivo: Evaluar resultados clínicos y características de la población atendida por cáncer de endometrio. Método: Se analizaron las historia clínicas de 100 pacientes tratadas por cáncer de endometrio entre enero de 2000 y diciembre de 2009. En el análisis de los datos se consideró como base la etapificación FIGO 1988. Resultados: La edad promedio fue de 62 años, el 75 por ciento de las pacientes consultaron por hemorragia post menopáusica y en el 64 por ciento de las pacientes el diagnóstico se realizó por dilatación y curetaje. En el 60 por ciento se realizó etapificación completa. El 60 por ciento correspondió a etapa I y el 15 por ciento a etapa II. La sobrevida global en etapa I y II fue del 83 por ciento y 66 por ciento, respectivamente. Conclusión: El cáncer de endometrio se presenta preferentemente en pacientes post menopáusicas en etapas precoces. La mayoría accede a tratamiento quirúrgico con escasas complicaciones y alta sobrevida global.


Background: Endometrial cancer is one of the most frecuent gynecological cancer. The incidence of this disease could arise because of epidemiologycal changes in female population. Aims: To evaluate characteristics and clinical results of atended population with endometrial cancer. Method: Clinical histories of 100 patients treated for endometrial cancer between January 2000 to December 2009 were analized. In the data analysis, the FIGO 1988 staging was considered as base. Results: The age average was 62 years. The 75 percent of patients consulted for postmenopausal hemorrhage in the 64 percent of the patients the diagnosis was made by dilation and curettage. Full staging was made in the 60 percent. Stage I was 60 percent and 15 percent for stage II. Overall survival in stage I and II was 83 percent and 66 percent, respectively. Conclusion: Endometrial cancer presents preferably in early stages in postmenopausal patients. The mayority access to surgical treatment with few complications and a high survival rate.


Assuntos
Humanos , Adulto , Feminino , Pessoa de Meia-Idade , Idoso de 80 Anos ou mais , Neoplasias do Endométrio/cirurgia , Neoplasias do Endométrio/epidemiologia , Distribuição por Idade , Seguimentos , Excisão de Linfonodo , Estadiamento de Neoplasias , Análise de Sobrevida , Resultado do Tratamento
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