Effects of self-radiation damage on electronic properties of 244Cm3+ in an orthophosphate crystal of YPO4

Large Ground-State and Excited-State Crystal Field Splitting of 8-fold-Coordinate Cm3+ in [Y(H2O)8]Cl3·15-crown-5

“…Excitation Spectra. When Cm 3+ is excited to the 6 D‘ 7/2 state instead of the F state, which was the case in the previous section, a very similar emission spectrum is observed due to the radiative relaxation 6 D‘ 7/2 → 8 S‘ 7/2 . We recorded emission spectra in the range of 16 660−17 860 cm -1 by exciting at more than 200 wavelengths between 480 and 680 nm.…”

“…When Cm 3+ is excited to the 6 D′ 7/2 state instead of the F state, which was the case in the previous section, a very similar emission spectrum is observed due to the radiative relaxation 6 D′ 7/2 f 8 S′ 7/2 . 30 We recorded emission spectra in the range of 16 660-17 860 cm -1 by exciting at more than 200 wavelengths between 480 and 680 nm. In addition to conventional excitation spectroscopy, where the intensity of only one emission wavelength is monitored by use of a monochromator while scanning the excitation laser, we obtain by using an optical multichannel analyzer a complete emission spectrum at each excitation wavelength, which allows comparing the emission spectra for many excitation wavelengths (see below).…”

Synthesis and sintering of a monazite–brabantite solid solution ceramic for nuclear waste storage

“…In the 1980s, numerous studies dealing with monazite as a nuclear waste-form, were carried out in the USA [8]. Since that time new data have confirmed the interest of monazite as an actinides waste-form, for chemical durability [9][10][11], resistance to radiation damage [6,7,12] and ability to incorporate various actinides [13][14][15][16][17][18][19][20][21].…”

Chemical durability and leaching mechanism of Ce0.5Eu0.5PO4 ceramics: Effects of temperature and pH values

“…In previous study, the solid solution of monazite-type CePO 4 doped with Eu was successfully prepared using the solid state method [1]. At present, the studies on the synthesis, thermal and mechanical properties, chemical durability of monazite ceramics containing various actinides or lanthanides (used as surrogates of actinides) are extensively carried out in the field of monazite ceramic waste-forms [7][8][9][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. These monazite ceramic waste-forms were generally sintered by conventional pressureless sintering (PLS) process.…”