In Memoriam: Peter Kleinheinz (1931–2022)

sor and from then onward he was able to devote himself entirely to scientific work again. For many years he maintained a very intensive collaboration and scientific exchange with his Russian colleagues in Dubna, where he codiscovered element flerovium (Fl) in a joint experiment. For his outstanding research work and findings, he received a large number of renowned awards and prizes, which cannot be mentioned here. He was an honorary doctor of the universities in Bratislava, Slovakia; Frankfurt am Main, Germany; and Dubna, Russia. In 1984, he received the Physics Prize of the German Physical Society (together with Gottfried Münzenberg and others), in 1996 the Otto Hahn Prize (together with Gottfried Münzenberg), in 1997 the G.N. Flerov Prize, in 1998 the SUN-AMCO Medal of the International Union of Pure and Applied Physics, in 2011 the Nicolaus Copernicus Medal, and in 2011 the Medal of the City of Toruń. Sigurd Hofmann was a diligent writer and speaker. He was invited to speak at countless international conferences, authored a large number of review articles, books and book chapters, many widely cited publications, and so on. He also liked to present scientific results at public events. In doing so, he was able to develop a thrilling picture of modern physics, but also of the big questions of cosmology and element synthesis in stars; he was also able to convey very clearly to the public how atoms can be made “visible.” Many chapters of his contemporary scientific life are recorded in his 2002 book On Beyond Uranium (CRC Press, ISBN 978-0-415-28496-7). His modesty and friendly nature were remarkable. You could always rely on him. His care, accuracy, and deliberateness in all work were outstanding. His persistence was one of the foundations for groundbreaking scientific achievements. He was always in the office or at the experiment, even late in the evening and on weekends, so that you could ask him at any time and always got detailed answers and competent advice. In 2019, Sigurd Hofmann inaugurated a so-called photopoint (see photograph above) in the Darmstadt International Convention Center “Darmstadtium,” named after the chemical element 110, which was discovered at GSI in Darmstadt in November 1994 in a SHIP experiment conducted under his leadership. We are pleased that we have been able to work with an excellent scientist and colleague as well as an outstanding teacher and great person for so many years. Now we mourn Sigurd Hofmann. Our deepest sympathy goes out to his family. We will remember him fondly.