1. F. Roesch 1, A.F. Novgorodov 2, D.V. Filossofov 2, K.P. Zhernosekov 1, N.A. Lebedev 2, G.-J. Beyer 3 and the ISOLDE Collaboration Isolation of lanthanide, titanium, hafnium and other radioisotopes from massive targets (Ta, W, etc.) irradiated with 1 GeV protons 1 Institute of Nuclear Chemistry, Johannes Gutenberg-Universität Mainz, Germany 2 Joint Institute of Nuclear Research, DLNP, 141980 Dubna, Russia; 3 ISOLDE Collaboration

2. - Availability of nca radiolanthanides for basic radiochemical and radiopharmaceutical research - Production of nca radiolanthanides - Separation of nca radiolanthanides aim  define isotopes of interest  coordinate irradiation concepts at CERN (targets,size of targets, irradiation periods etc.) with radiochemical separation (Geneva and Mainz)  management of applacation of isolated radionuclides programme

3. CERN-Geneva isotope production Basel cocktail JINR Dubna Radiolanthanide expertise Mainz isotope separation Transport of irradiated Ta converters networking

4. Ta converters after irradiation ISOLDE targets equipped with UC pellets for radioisotope production and a Tantalum (Ta)-bar for converting the incoming proton beam (E=1.4 GeV) into spallation neutrons bar length of 150 mm, Ø 10 mm, mass 195 g received a total dose of 2.5·10 18 protons of 1.4 GeV to assess activity and contamination levels, target dismounted bar deformed by the deposited heat and shockwaves of the proton beams strong deformation leads to the expectation of considerable inhomogeneity in activation

5. Radiochemical separation I: Ta /*Ln [ separate nca. radiolanthanides from 195 g Ta ] - dissolution of tantalum target in HF(conc) + HNO 3 solution - dissolution process: 2 days - isolation of the nca radiolanthanide *LnF 3 fraction: by adding fine-dispersed charcoal - filtration of the charcoal / *Ln fraction

6. Radiochemical separation II: *Ln separation [ separate nca. radiolanthanides from each other: baseline ] - desorption of *Ln from charcoal using B(OH) 3 - purification (cyclic) of the nca *Ln fraction: 1. precipitation as hydroxides *Ln(OH) 3 2. centrifugation 3. dissolution in < 0.1 ml 1 M HCl 4. + 5 ml H 2 O + NH 3 etc. - transfer to cation exchange chromatography (AG6 /  -HIB)

7. Isotope T 1/2 activity (MBq) Ce-139137.6 d19.7 Pm-143265 d189 Pm-144363 d4.7 Pm-1465.53 a0.26 Sm-145340 d109 Eu-14724.1 d0.3 Eu-14854.5 d9.7 Eu-14993.1 d0.7 individual nca radiolanthanides available: Ce - Eu

8. Isotope T 1/2 activity (MBq) Gd-14648.27 d 35 Gd-151124 d187 Gd-153241.6 d221 Tb-16072.3 d0.03 Dy-159144.4 d100 Tm-16893.1 d 4 Yb-16932.03 a 4 individual nca radiolanthanides available: Gd - Yb

9. Isotope T 1/2 activity (MBq) Lu-1731.37 a133 Lu-1743.31 a 6 individual nca radiolanthanides available: Lu

10. Isotope T 1/2 activity (MBq) Lu-1731.37 a133 Lu-1743.31 a 6 Lu-172 6 d  50 via a 172 Hf / 172 Lu radionuclide generator individual nca radiolanthanides available: Lu +