VUV spectroscopy of KYF4 crystals doped with Nd3+, Er3+ and Tm3+

VUV–UV 5d–4f interconfigurational transitions of Nd3+ in BaMgF4 ferroelectric crystals

“…Nevertheless, it is reasonable to state that the VUV emission features related to transitions to 4 I J (4f 3 ) terminating states are the strongest ones in the 5d-4f emission spectrum of BMF:Nd 3 þ . This was observed in many different oxide and fluoride hosts and it is well proven by calculation of oscillator strengths for Nd 3 þ 5d-4f transitions (see [15][16][17][18][19][20] and references therein). The measurements were also carried out at low temperature (8 K) under the same experimental conditions.…”

Luminescence and excitation spectra of YAG:Nd3+ excited by synchrotron radiation

“…The vacuum ultraviolet emission and excitation spectra of Nd 3+ diluted into wide band gap hosts have recently attracted attention for applications such as laser crystals [1], scintillators [2,3], upconverters [4,5], as well as for theoretical investigations [6,7]. The typical 4f 2 5d 1 -4f 3 luminescence of Nd 3+ in various oxide and fluoride hosts is fast (with a decay time of the order 10 ns described by a single exponential) and shows usually a broad-band emission with the shortest wavelength and strongest band centered around 190 nm.…”

Prediction of pressure-induced redshift of f1→d(t2g)1 excitations in Cs2NaYCl6:Ce3+ and its connection with bond-length shortening

“…[1][2][3][4][5][6] Yet, it contradicts the widespread assumption that the f n → f n−1 d 1 excitations lengthen the impurity-ligand bonds. [7][8][9][10] Usually, the materials involving f-element ion complexes are liquid or solid solutions and a direct experimental proof of the bond shortening could be obtained, in principle, by means of ground-͑f n ͒ and excited-state ͑f n−1 d 1 ͒ extended x-ray-absorption fine structure ͑EXAFS͒ measurements. In this respect, a theoretical study of ͑CeX 6 ͒ 3− ͑X =F,Cl,Br͒ complexes in cubic elpasolites, liquid acetonitrile solution, and gas phase, has pointed out the chloride and bromide complexes in acetonitrile as good candidates for excited-state EXAFS experiments because the negative bond-length shifts are largest and the liquid medium could favor the experimental setting.…”