Triple- and quadruple-escape peaks in HPGe detectors: experimental observation and MonteCarlo simulation - Maidana, Nora Lia; Brualla, L; Vanin, Vito Roberto; Oliveira, José Roberto Brandão de; Rizzutto, Márcia de Almeida; Nascimento, E do; Fernandez-Varea, J M (Nuclear Instruments and Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipament, 2010)