Radiation Damage Studies of Co 2+  and Ni 2+  Doped NH 4 Cl Crystals | Zendy

Rambau B. | Zendy; Ramasastry C. | Zendy; Chowdari B. V. R. | Zendy

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Radiation Damage Studies of Co 2+ and Ni 2+ Doped NH 4 Cl Crystals

Author(s) -

Rambau B.,

Ramasastry C.,

Chowdari B. V. R.

Publication year - 1983

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221180144

Subject(s) - irradiation , impurity , doping , absorption (acoustics) , crystal (programming language) , radiation damage , crystallography , analytical chemistry (journal) , absorption spectroscopy , chemistry , materials science , inorganic chemistry , physics , optics , chromatography , optoelectronics , organic chemistry , computer science , nuclear physics , composite material , programming language

Results from the radiation damage studies of NH 4 Cl:Co 2+ and NH 4 Cl:Ni 2+ crystals are presented. On X‐irradiation at room temperature the NH 4 Cl:Co 2+ crystals are found to absorb at 270, 345, 585, 900, and 1000 nm. These absorption bands are attributed to the charge transfer transitions between radiation induced hydrazine‐like defect, N 2 H 4 + , and ligands H 2 O or NH 3 which are made available in the crystal along with the divalent impurity. If not all the absorption bands but similar absorption is found on irradiation in Ni 2+ doped NH 4 Cl crystals also. ESR studies of X‐rayed Ni 2+ doped NH 4 Cl crystals reveal the formation of both, Ni + and Ni 3+ . Spin‐Hamiltonian parameters for these centers are given.

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