GSI Helmholtzzentrum für Schwerionenforschung GmbH
SHE Chemistry
Planckstrasse 1
D-64291 Darmstadt
Germany
Room: SB3 3.163
Phone: +49 6159 71 2588
E-mail: J.Ballof@gsi.de
Scientific Career
- since 08/2023:
Staff scientist at the Superheavy Element Chemistry department at GSI - 05/2022 - 07/2023:
Research Associate at the Facility for Rare Isotope Beams (FRIB), Michigan State University
Design, assembly and commissioning of the EDM3 instrument beamline to enable spectroscopic studies of radioactive molecules in cryogenic solids - 12/2021:
PhD thesis in Nuclear Chemistry "Radioactive Molecular Beams at CERN-ISOLDE"
Degree conferred: Dr. rer.nat (equivalent to PhD) Johannes Gutenberg University Mainz - 02/2019 - 01/2022:
Senior Fellow at CERN-ISOLDE
ISOLDE target and ion source development group - 02/2015 - 01/2019:
Doctoral student at CERN-ISOLDE and Johannes Gutenberg-Universität Mainz
Developments for the production of refractory element and other new radioactive molecular beams - 10/2014:
Diploma thesis in Chemistry Vorbereitungen zur Untersuchung des chemischen Verhaltens von Transactiniden mit dem gasgefüllten Separator TASCA (in German)
Degree conferred: Dipl.-Chem. (equivalent to M.Sc.) Johannes Gutenberg University Mainz
Publications
2023
S. Rothe, M. Au, J. Ballof, M. Bissell, M. Bovigny, K. Chrysalidis, B. Crepieux, J. Cruikshank, E. Fadakis, R. Heinke, F. Josa, L. Le, A. Koliatos, E. Piselli, E. Reis,c, V. Samothrakis, M. Schuett, L. Lambert, D. Leimbach, S. Marzari, M. Owen, S. Stegemann, Y. N. Vila Gracia
Targets and ion sources at CERN-ISOLDE — Facilities and developments
Nucl. Instrum. Meth. B 542, 38-44 (2023)
M. Au, M. Athanasakis-Kaklamanakisa, L. Nies, J. Ballof, R. Berger, K. Chrysalidis, P. Fischerd, R. Heinke, J.Johnson, U. Köster, D. Leimbach, B. Marsh, M. Mougeot, J. Reilly, E. Reis, M. Schlaich, Ch. Schweiger, L.Schweikhard, S. Stegemann, J. Wessolek, F. Wienholtz, S. G. Wilkins, W. Wojtaczka, Ch. E. Düllmann, S. Rothe
In-source and in-trap formation of molecular ions in the actinide mass range at CERN-ISOLDE
Nucl. Instrum. Meth. B 541, 375-379 (2023)
C.S. Sumithrarachchi, Y. Liu, S.N. Rogers, S. Schwarz, G. Bollen, N. Gamage, A. Henriques, A. Lapierre, R. Ringle, I. Yandow, A.C.C. Villari, K.A. Domnanich, S. Satija, G.W. Severin, M. Au, J. Ballof, Y.N. Vila Garcia, M. Owen, E. Reis, S. Rothe
The new Batch Mode Ion Source for stand-alone operation at the Facility for Rare Isotope Beams (FRIB)
Nucl. Instrum. Meth. B 541, 301-304 (2023)
J. Ballof, N. Nusgart, P. Lalain, M. Au, R. Heinke, S. Stegemann, M. Schuett, S. Rothe, J.T. Singh
Progress towards the FRIB-EDM3-Frontend: A tool to provide radioactive molecules from isotope harvesting for fundamental symmetry studies
Nucl. Instrum. Meth. B 541, 224-227 (2023)
M. Au, C. Bernerd, Y. Nel Vila Gracia, M. Athanasakis-Kaklamanakis, J. Ballof, M. Bissell, K. Chrysalidis, R. Heinke, L. Le, R.Mancheva, B. Marsh, J. Rolewska, M. Schuett, T. Venenciano, S. Wilkins, Ch. E Düllmann, S. Rothe
Developments at CERN-ISOLDE's OFFLINE 2 mass separator facility for studies of molecular ion beams
Nucl. Instrum. Meth. B 541, 144-147 (2023)
2022
J. Ballof, K. Chrysalidis, Ch. E. Düllmann, V. Fedosseev, E. Granados, D. Leimbach, B. A. Marsh, J. P. Ramos, A. Ringvall-Moberg, S. Rothe, T. Stora, S. G. Wilkins & A. Yakushev
A concept for the extraction of the most refractory elements at CERN-ISOLDE as carbonyl complex ions
Eur. Phys. J. A 58, 94 (2022)
J. Ballof, M. Au, E. Barbero, K. Chrysalidis, Ch.E. Düllmann, V. Fedosseev, E. Granados, R. Heinke, B.A. Marsh, M. Owen, S. Rothe, T. Stora, A. Yakushev
A cold electron-impact ion source driven by a photo-cathode – New opportunities for the delivery of radioactive molecular beams?
J. Phys.: Conf. Ser. 2244, 012072 (2022)
A.E. Barzakh, A.N. Andreyev, D. Atanasov, J.G. Cubiss, R.D. Harding, M. Al Monthery, N.A. Althubiti, B. Andel, S. Antalic, J. Ballof, K. Blaum, T.E. Cocolios, P. Van Duppen, T. Day Goodacre, A. de Roubin, C. Duchemin, G.J. Farooq-Smith, D.V. Fedorov, V.N. Fedosseev, D.A. Fink, L.P. Gaffney, L. Ghys, M. Huyse, N. Imai, J. Johnson, S. Kreim, D. Lunney, K.M. Lynch, V. Manea, B.A. Marsh, Y. Martinez Palenzuela, P.L. Molkanov, D. Neidherr, V.N. Panteleev, M. Rosenbusch, R.E. Rossel, S. Rothe, L. Schweikhard, M.D. Seliverstov, S. Sels, C. Van Beveren, E. Verstraelen, A. Welker, F. Wienholtz, R.N. Wolf, K. Zuber
Producing gold at ISOLDE-CERN
Nucl. Instrum. Meth. B 513, 26-32 (2022)
2021
S. Stegemann, J. Ballof, T.E. Cocolios, J.-G. Correia, K. Dockx, O. Poleshchuk, J.P. Ramos, J. Schell, T. Stora, J. Vleugels.
A porous hexagonal boron nitride powder compact for the production and release of radioactive 11C
J. of the European Ceramic Society 41, 4086-4097 (2021)
E. Kröll, M. Vadalà, J. Schell, S. Stegemann, J. Ballof, S. Rothe, D. C. Lupascu
Yttrium oxide freeze-casts: Target materials for radioactive ion beams
Materials 14, art. no. 2864 (2021)
Götz, M., Götz, S., Kratz, J.V., Ballof J.,Düllmann, Ch.E., Eberhardt, K., Mokry, C., Renisch, D., Runke, J., Sato, T.K., Thörle-Pospiech, P., Trautmann, N., Yakushev, A.
Gas phase synthesis of 4d transition metal carbonyl complexes with thermalized fission fragments in single-atom reactions
Radiochim. Acta 109, 153–165 (2021)
2020
D. Leimbach, J. Karls, Y. Guo, R. Ahmed, J. Ballof, L. Bengtsson, F.B. Pamies, A. Borschevsky, K. Chrysalidis, E. Eliav, D. Fedorov, V. Fedosseev, O. Forstner, N. Galland, R. Fernando Garcia Ruiz, C. Granados, R. Heinke, K. Johnston, A. Koszorus, U. Köster, M.K. Kristiansson, Y. Liu, B. Marsh, P. Molkanov, L.F. Pašteka, J.P. Ramos, E. Renault, M. Reponen, A. Ringvall-Moberg, R.E.Rossel, D. Studer, A. Vernon, J. Warbinek, J. Welander, K. Wendt, S. Wilkins, D. Hanstorp, S. Rothe
The electron affinity of astatine
Nature Communications 11, art. no. 3824 (2020)
K. Chrysalidis, A.E. Barzak, R. Ahmed, A.N. Andreyev, J. Ballof, J.G. Cubiss, D.V. Fedorov, V.N. Fedosseev, L.M. Fraile, R.D. Harding, U. Köster, B.A. Marsh, C. Raison, J.P. Ramos, R.E. Rossel, S. Rothe, K. Wendt, S.G. Wilkins
In-source laser spectroscopy of dysprosium isotopes at the ISOLDE-RILIS
Nucl. Instrum. Meth. B 463, 472-475 (2020)
J. Ballof, J.P. Ramos, A. Molander, K. Johnston S. Rothe, T. Stora, Ch.E. Düllmann
The upgraded ISOLDE yield database - a new tool to predict beam intensities
Nucl. Instrum. Meth. B 463, 211-215 (2020)
2019
K. Chrysalidis, J. Ballof, Ch. E. Düllmann, V. N. Fedosseev, C. Granados, B. A. Marsh, Y. Martinez Palenzuela, J.P. Ramos, S. Rothe, T. Stora, K. Wendt
Developments towards the delivery of selenium ion beams at ISOLDE
Eur. Phys. J. A 55, 173 (2019)
J. Ballof, Ch. Seiffert, Ch.E. Düllmann, M. Delonca, M.M. Flores, M. Gai, A. Gottberg, T. Kröll, R. Lica, Y. Martinez Palenzuela, T. Mendonca, J.P. Ramos, S. Rothe, T. Stora, O. Tengblad and F. Wienholtz
Radioactive boron beams produced by isotope online mass separation at CERN-ISOLDE
Eur. Phys. J. A 55, 65 (2019)
I. Tomandl, J. Vacík, U. Köster, L. Viererbl, E. A. Maugeri, S. Heinitz, D. Schumann, M. Ayranov, J. Ballof, R. Catherall, K. Chrysalidis, T. Day Goodacre, D. Fedorov, V. Fedosseev, K. Johnston, B. Marsh, S. Rothe, J. Schell, and Ch. Seiffert
Measurement of the Be-7 (n,p) cross section at thermal energy
Physical Review C 99, art. no. 014612 (2019)
2018
L. Lens, A. Yakushev, Ch. E. Düllmann, M. Asai, J. Ballof, M. Block, H.M.David, J. Despotopulos, A. Di Nitto, K. Eberhardt, J. Even, M. Götz, S. Götz, H. Haba, L. Harkness-Brennan, F.P. Heßberger, R.D. Herzberg, J. Hoffmann, A. Hübner, E. Jäger, D. Judson, J. Khuyagbaatar, B. Kindler, Y. Komori, J. Konki, J.V. Kratz, J. Krier, N. Kurz, M. Laatiaoui, S. Lahiri, B. Lommel, M. Maiti, A.K. Mistry, Ch. Mokry, K. Moody, Y. Nagame, J.P. Omtvedt, Ph. Papadakis, V. Pershina, J. Runke, M. Schädel, P. Scharrer, T. Sato, D. Shaughnessy, B. Schausten, P. Thörle-Pospiech, N. Trautmann, K. Tsukada, J. Uusitalo, A. Ward, M. Wegrzecki, N. Wiehl und V. Yakusheva
Online chemical adsorption studies of Hg, Tl, and Pb on SiO2 and Au surfaces in preparation for chemical investigations on Cn, Nh, and Fl at TASCA
Radiochim. Acta 106, 949 (2018)
Y.Martinez Palenzuela, B.A.Marsh, J.Ballof, R.Catherall, K.Chrysalidis, T.E.Cocolios, B.Crepieux, T.Day Goodacre, V.N.Fedosseev, M.H.Huyse, P.B.Larmonier, J.P.Ramos, S.Rothe, J.D.A.Smith, T.Stora, P.Van Duppen, S.Wilkins
Enhancing the extraction of laser-ionized beams from an arc discharge ion source volume
Nucl. Instrum. Meth. B 431, 59-66 (2018)
L. Damone, M. Barbagallo, M. Mastromarco, A. Mengoni, L. Cosentino, Maugeri, S. Heinitz, D. Schumann, R. Dressler, F. Käppeler, N. Colonna, P. Finocchiaro, J. Andrzejewski, J. Perkowski, A. Gawlik, O. Aberle, S. Altstadt, M. Ayranov, L. Audouin, M. Bacak, J. Balibrea-Correa, J. Ballof, Becares, F. Bečvár, C. Beinrucker, G. Bellia, A.P. Bernardes, E. Berthoumieux, J. Billowes, M.J.G. Borge, D. Bosnar, A. Brown, M. Brugger, M. Busso, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, D. M. Castelluccio, R. Catherall, F. Cerutti, Y. H. Chen, E. Chiaveri, J.G.M. Correia, G. Cortes, M.A. Cortes-Giraldo, S. Cristallo, M. Diakaki, M. Dietz, C. Domingo-Pardo, A. Dorsival, E. Dupont, I. Duran, B. Fernandez-Dominguez, A. Ferrari, P. Ferreira, W. Furman, S. Ganesan, A. García-Rios, S. Gilardoni, T. Glodariu, K. Göbel, I. F. Gonçalves, E. González-Romero, T. D. Goodacre, E. Griesmayer, C. Guerrero, F. Gunsing, H. Harada, T. Heftrich, J. Heyse, D. G. Jenkins, E. Jericha, K. Johnston, Y. Kadi, A. Kalamara, T. Katabuchi, P. Kavrigin, A. Kimura, N. Kivel, U. Köster, M. Kokkoris, M. Krtička, D. Kurtulgil, E. Leal-Cidoncha, C. Lederer-Woods, H. Leeb, J. Lerendegui-Marco, S. Lo Meo, S. J. Lonsdale, R. Losito, D. Macina, J. Marganiec, B. Marsh, T. Martínez, A. Masi, C. Massimi, P. Mastinu, F. Matteucci, A. Mazzone, E. Mendoza, P. M. Milazzo, F. Mingrone, M. Mirea, A. Musumarra, A. Negret, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, L. Piersanti, M. Piscopo, A. Plompen, I. Porras, J. Praena, J. M. Quesada, D. Radeck, K. Rajeev, T. Rauscher, R. Reifarth, A. Riego-Perez, S. Rothe, P. Rout, C. Rubbia, J. Ryan, M. Sabate-Gilarte, A. Saxena, J. Schell, P. Schillebeeckx, S. Schmidt, P. Sedyshev, C. Seiffert, G. Smith, N. V. Sosnin, A. Stamatopoulos, T. Stora, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, C. Weiß, C. Wolf, P. J. Woods, T. Wright, P. Žugec
7Be (n,p) 7Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n-TOF at CERN
Phys. Rev. Let. 121, 042701 (2018)
2017
M. Götz, S. Götz, J.V. Kratz, Ch.E. Düllmann, Ch. Mokry, Ch., J. Runke, P. Thörle-Pospiech, N. Wiehl, M. Schädel, J. Ballof, H. Dorrer, J. Grund, D. Huber, E. Jäger, O. Keller, J. Krier, J. Khuyagbaatar, L. Lens, B. Lommel, M. Mendel, K.J. Moody, P. Scharrer, B. Schausten, D. Shaughnessy, M Schmitt, J. Steiner, N. Trautmann, A. Yakushev, V. Yakusheva
Radiochemical study of the kinematics of multi-nucleon transfer reactions in 48Ca + 248Cm collisions 10% above the Coulomb barrier
Nucl. Phys. A 961, 1-21 (2017)
2015
A. Di Nitto, A. Yakushev, Ch. E. Düllmann, J. Khuyagbaatar, J. Krier, J. Ballof, J. Bar, T. Budzynski, D.M. Cox, X. Derkx, J. Dormand, J.D. Despotopulos, K. Eberhardt, J. E.ven, P. Grabiec, L. Harkness-Brennan, R.D. Herzberg, A. Huebner, E. Jäger, D. Judson, B. Kindler, H. Klos, J.V. Kratz, J. Kulawik, N. Kurz, L. Lens, B. Lommel, K. Moody, A. Panas, P. Prokaryn, D. Rudolph, J. Runke, I. Rusanov, P. Scharrer, B. Schausten, D. Shaughnessy, D. Szmigiel, A.J. Ward, M. Wegrzecki
ALBEGA: A decay spectroscopy setup for chemically separated samples
GSI Scientific Report 2014, 184 (2015)
A. Yakushev, L. Lens, Ch.E. Düllmann, D. Ackermann, M. Asai, J. Ballof, M. Block, H. Brand, D.M. Cox, J. Despotopulos, A. Di Nitto, K. Eberhardt, J. Even, F. Fan, P. Golubev, H. Haba, W. Hartmann, R.-D. Herzberg, F.P. Heßberger, J. Hoffmann, A. Hübner, E. Jäger, J. Khuyagbaatar, B. Kindler, J.V. Kratz, J. Krier, N. Kurz, S. Lahiri, B. Lommel, M. Maiti, A. Mistry, Ch. Mokry, K. Moody ,Y. Nagame, J.P Omtvedt, Ph. Papadakis, Z.. Qin, D. Rudolph, J. Runke, I. Rusanov, L.G. Sarmiento, T, Sato, M. Schädel, P. Scharrer, B. Schausten, D. Shaughnessy, J. Steiner, P. Thörle-Pospiech, N. Trautmann, J. Uusitalo, D. Ward, M. Wegrzecki, N. Wiehl, V. Yakusheva
Chemical study of Fl, Cn, their lighter homologs, and Rn at TASCA
GSI Scientific Report 2014, 179 (2015)
2012
J. Khuyagbaatar, D. Ackermann, L.-L. Andersson, J. Ballof, W. Bruechle, Ch. E. Duellmann, J. Dvorak, K. Eberhardt, J. Even, A. Gorshkov, R. Graeger, F. -P. Hessberger, D. Hild, R. Hoischen, E. Jaeger, B. Kindler, J. V. Kratz, S. Lahiri, B. Lommel, M. Maiti, E. Merchan, D. Rudolph, M. Schaedel, H. Schaffner, B. Schausten, E. Schimpf, A. Semchenkov, A. Serov, A. Tuerler, A. Yakushev
Study of the average charge states of 188Pb and 252,252No ions at the gas-filled separator TASCA
Nucl. Instrum. Meth. 689 (2012) 40-46
2011
J. Even, J. Ballof, W. Brüchle, R.A. Budaa, Ch.E. Düllmann, K. Eberhardt, A. Gorshkov, E. Gromm, D. Hild, E. Jäger, J. Khuyagbaatar, J.V. Kratz, J. Krier, D. Liebe, M. Mendel, D. Nayak, K. Opel, J.P. Omtvedt, P. Reichert, J. Runke, A. Sabelnikov, F. Samadani, M. Schädel, B. Schausten, N. Scheid, E. Schimpf, A. Semchenkovbd, P. Thörle-Pospiech, A. Toyoshima, A. Türler, V. Vicente Vilas, N. Wiehl, T. Wunderlich, A. Yakushev
The Recoil Transfer Chamber – an interface to connect the physical preseparator TASCA with chemistry and counting setups.
Nucl. Instrum. Meth. A 638, 157-164 (2011)
2009
Schädel, D. Ackermann, L.-L. Andersson, J. Ballof, M. Block, R.A. Buda, W. Brüchle, I. Dragojevi, Ch.E. Düllmann, J. Dvorak, K. Eberhardt, J. Even, J.M. Gates, J. Gerl, A. Gorshkov, P. Golubev, R. Graeger, K.E. Gregorich, E. Gromm, W. Hartmann, F.P. Heßberger, D . Hild, R. Hoischen, A. Hübner, E. Jäger, J. Khuyagbaatar, B. Kindler, I. Kojouharov, J.V. Kratz, J. Krier, N. Kurz, S. Lahir, D. Liebe, B. Lommel, M. Maiti, M. Mendel, E. Merchán, H. Nitsche, D. Nayak, J. Nilssen, J.P. Omtvedt, K. Opel, P. Reichert, D. Rudolph, A. Sabelnikov, F. Samadani, H. Schaffner, B. Schausten, R. Schuber, E. Schimpf, A. Semchenkov, L. Stavsetra, J. Steiner, J. Szerypo, P. Thörle-Pospiech, A. Toyoshima, A. Türler, J. Uusitalo, N. Wiehl, H.-J. Wollersheim, T. Wunderlich, and A. Yakushev
TASCA Commissioning Completed
GSI Scientific Report 2008, 138 (2009)
Even, J.V. Kratz, J. Ballof, R.A. Buda, K. Eberhardt, E. Gromm, D. Hild, D. Liebe, M. Mendel, P. Reichert, P. Thörle-Pospiech, N. Wiehl, T. Wunderlich, W. Brüchle, Ch. E. Düllmann, E. Jäger, J. Krier, M. Schädel, B. Schausten, A. Semchenkov, D. Nayak, A. Toyoshima, A. Türler, A. Yakushev
First transactinide chemistry behind TASCA
GSI Scientific Report 2008, 143 (2009)
Progress towards the EDM3 instrument at FRIB: A tool for studying radioactive molecules embedded inside cryogenic solids
14th International Conference on Stopping and Manipulation of Ions and Related Topics, Giessen, Germany (2023), Invited Talk
Radioactive Molecular Beams – From ISOL Targets to Fundamental Symmetries
Fifth International Conference on Application of Radiotracers and Energetic Beams in Sciences, Purulia, India (2023), Invited Talk
Radioactive Molecular Beams – From ISOL Targets to Fundamental Symmetries
GSI Seminar, Darmstadt Germany (2022), Invited Talk
Towards a photo-cathode driven electron-impact ion source for new molecular beams – Numerical simulations of the ion extraction
ISOLDE Workshop and Users Meeting, Geneva, Switzerland (2022), Poster
The EDM3 instrument at FRIB: A tool for studying radioactive molecules embedded inside cryogenic solids
Fundamental Symmetries at FRIB Workshop / FRIB Research Discussion, East Lansing, USA (2022), Contributed Talk
Progress towards the EDM3 instrument at FRIB Part 1: Ionization and mass separation
Fall 2022 Meeting of the APS Division of Nuclear Physics, New Orleans, USA (2022), Contributed Talk
Progress towards the EDM3 instrument at FRIB: A tool for studying radioactive molecules embedded inside cryogenic solids
19th International Conference on Electromagnetic Isotope Separators and Related Topics, Daejeon, Korea (2022), Contributed Talk
A cold electron-impact ion source driven by laser-induced electron emission – New opportunities for radioactive molecular beams?
19th International Conference on Ion Sources, Victoria, BC, Canada, (2021), Contributed Talk
Ion source development for the measurement of the ionization potential of superheavy elements
6th International Conference on the Chemistry and Physics of the Transactinide Elements, Wilhelmshaven, Germany (2019), Poster
Molecular beams in the ISOL process
18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland (2018), Contributed Talk
The ISOLDE Yield Database - A new tool to predict beam intensities
18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland (2018), Poster
The ISOLDE Yield Database
ISOLDE Collaboration Committee meeting (2017), Invited Talk
New radioactive beams for HIE-ISOLDE
6th Workshop on Nuclear Fission and Spectroscopy, Chamrousse, France (2017), Poster
Volatile carbonyl compounds for new radioactive ion beams at ISOLDE
CHE Collaboration meeting, Ascona, Switzerland (2017), Contributed Talk
Volatile carbonyl compounds for new radioactive ion beams at ISOLDE
16th Workshop on Recoil Separator for Superheavy Element Chemistry, Darmstadt, Germany (2017), Contributed Talk
Target developments in 2017
ISOLDE Workshop and Users meeting 2017, Geneva, Switzerland (2017), Invited Talk
Ion sources for new radioactive refractory element beams at CERN-ISOLDE
17th international Conference on Ion Sources, Geneva, Switzerland (2017), Poster
New beams at CERN-ISOLDE
CHANDA – Workshop on Target Preparation, Villigen, Switzerland (2015), Contributed talk