Single phase MnW_1-xTi_xO₄ (x=0.0, 0.05, 0.1) samples of wolframite structure were prepared utilizing a controlled co-precipitation method. The influence of Ti doping on the structural parameters was investigated by applying Rietveld method to analyze the measured x-ray diffraction patterns. The crystallite size reduced while cell parameters changed non-monotonically, the (b) and (c) parameters experienced a modest increase, whereas the (a) parameter decreased. The Mn²⁺ octahedron became more symmetric with expansion in the average bond length and volume while W⁶⁺ octahedron diminished and became more distorted. The measured Raman spectrum disclosed a systematic red-shift and broadening upon Ti doping which approves the octahedrons distortion and confirms incorporation of Ti substitutionally for W. Both direct and indirect optical band gap energies for MnW_1-xTi_xO₄ were significantly diminished and the absorbance was enhanced. The aliovalent substitution W⁶⁺ by Ti⁴⁺ introduces mid-gap/shallow states and increases disorder/band-tailing, leading to lowering the optical band gap and modifying the absorption. The photoluminescence emission intensity of MnW_1-xTi_xO₄ greatly quenched with Ti content (x), upgrading the doped samples as photocatalyst. At 15 keV, linear attenuation coefficient (LAC) and mass attenuation coefficient (MAC) values are (675.6, 935.9, 682.9) cWm^-1 and (93.8, 132.8, 99.2) cm²/g, respectively. At 15 MeV, these values change to (0.302, 0.368, 0.299) cm^-1 and (0.042, 0.052, 0.043) cm²/g for samples with x=0, 0.05, and 0.1, respectively. Both half-value layer (HVL) and tenth value layer (TVL) parameters were reduced with incorporation of 5% Ti in the host sample, whereas higher additions of Ti resulted in additional reductions. The sample containing 5% Ti exhibits the lowest mean free path (MFP) of 3.5 cm at an energy of 5 MeV. The sample having 5% Ti exhibits the greatest effective atomic number (Z_eff) values. The fast neutron removal cross section (FNRCS) value is maximal for the MnWO₄ sample in comparison to the other samples. The sample with 5% Ti demonstrates the utmost radiation protection efficacy (RPE) values.

Title

Radiation Physics and Chemistry

Publisher

Elsevier

Publisher Country

United States of America

Indexing

Thomson Reuters

Impact Factor

3.3

Publication Type

Both (Printed and Online)

Volume

--

Year

2026

Pages

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