RT null T1 Attosecond transient absorption spectroscopy of doubly-excited states in helium A1 Argenti L., A1 Ott C., A1 Pfeifer T., A1 Martín, Fernando A1 Martín, Fernando A1 Martín, Fernando YR 2014 FD 2014 LK http://hdl.handle.net/20.500.12614/2272 UL http://hdl.handle.net/20.500.12614/2272 LA en DS Repositorio institucional de IMDEA Nanociencia RD 29 abr. 2026