Identification of Luminescence Bands of Nd[sup 3+] Ions in Yttrium Aluminates Y[sub 3]Al[sub 5]O[sub 12] and YAlO[sub 3]

Luminescence of spodumene and garnet crystals excited by subnanosecond and nanosecond electron beams

“…Figure 3 shows the typical spectrum recorded at a beam current density of ~100 A/cm 2 and a half maxi mum pulse duration of 0.25 ns and the transmission spectrum of optical fiber 2. The spectrum of Nd 3+ :YAG (curve 2) contains the well known intense bands of the Nd 3+ ion induced by optical transitions from the 5d 2 F2 5/2 levels to the 4f levels of the ion and weak bands of 4f 4f transitions [4,13]. The spo dumene spectrum has a strong band of the Mn 2+ ion ( 4 T 1 4 A 1 transition) with a maximum at λ = 610 nm and two weak short wavelength bands of two non equivalent intrinsic hole centers of luminescence of type with maxima at λ = 330-350 and 410-440 nm [14].…”

“…This work is a continuation of the investigations of the PCL of spodumene and yttrium-aluminum garnet that were performed in our earlier works at nanosecond [1][2][3][4] and subnanosecond [6,7,9] beam current pulse durations in various crys tals.…”

“…When using small accelerators with vacuum diodes researchers were able to substantially increase the peak luminescence intensity and to study pulsed cathode luminescence (PCL) of various minerals in air during excitation by nanosecond electron beams [1][2][3][4][5]. Sub nanosecond electron beams were used to record the spectra [6,7] and the irradiation kinetics of minerals at a time resolution of 3.0 [8] and 0.3 ns [9].…”