TY - JOUR
T1 - RES structure of Bi3+ centres in KCl
T2 - Bi, S and CaO : Bi crystals
AU - Aceves, R.
AU - Barboza Flores, M.
AU - Maaroos, A.
AU - Nagirnyi, V.
AU - Perez Salas, R.
AU - Tsuboi, T.
AU - Zazubovich, S.
AU - Zepelin, V.
PY - 1996/4
Y1 - 1996/4
N2 - Emission, excitation, and polarization spectra as well as decay kinetics are studied at 4.2 to 500 K for the luminescence of Bi3+ centres in two crystals (KCl and CaO) with strongly different electron-phonon interaction. It is concluded that three bands at ≈2.5, 3.11, and ≈1.5eV, observed in the emission spectrum of the KCl:Bi, S crystal belong to the same centre, but arise from states of different origin. The splitting of the 2.5 eV band, caused by the presence of a defect (S2-) near a Bi3+ ion is detected. Besides the well-known triplet 3.3 and 3.1 eV bands, a new 4.15 eV emission is found in CaO: Bi crystal, which is ascribed to transitions from the singlet excited state of the Bi3+ ion. The structure and the parameters of the relaxed excited states are determined and the models of the corresponding Br3+ centres are discussed.
AB - Emission, excitation, and polarization spectra as well as decay kinetics are studied at 4.2 to 500 K for the luminescence of Bi3+ centres in two crystals (KCl and CaO) with strongly different electron-phonon interaction. It is concluded that three bands at ≈2.5, 3.11, and ≈1.5eV, observed in the emission spectrum of the KCl:Bi, S crystal belong to the same centre, but arise from states of different origin. The splitting of the 2.5 eV band, caused by the presence of a defect (S2-) near a Bi3+ ion is detected. Besides the well-known triplet 3.3 and 3.1 eV bands, a new 4.15 eV emission is found in CaO: Bi crystal, which is ascribed to transitions from the singlet excited state of the Bi3+ ion. The structure and the parameters of the relaxed excited states are determined and the models of the corresponding Br3+ centres are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0030544768&partnerID=8YFLogxK
U2 - 10.1002/pssb.2221940217
DO - 10.1002/pssb.2221940217
M3 - Artículo
SN - 0370-1972
VL - 194
SP - 619
EP - 631
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
IS - 2
ER -