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Hyperfine Interactions

, 240:68 | Cite as

Effect of nanopore on hydration of hafnium investigated by TDPAC as a hyperfine tool

  • Debashis BanerjeeEmail author
  • Dhanadeep Dutta
  • Sk. Wasim Raja
  • S. V. Thakare
Article
  • 6 Downloads
Part of the following topical collections:
  1. Proceedings of the International Conference on Hyperfine Interactions and their Applications (HYPERFINE 2019), Goa, India, 10-15 February 2019

Abstract

The Time Differential Perturbed γ-γ Angular Correlation (TDPAC) measurement has been carried out with the hydrolysis product of Hafnium(Hf)-IV ion at pH1 both in bulk and under nano confinement using 181Hf/Ta as PAC probe. The experiment was performed at two different temperatures, viz., 300 K and 280 K. Three different probe sites could be identified for the bulk complex while it is four in case the complex is inside the nanopore, at both the measuring temperatures. The major site, in case of bulk complex, has a quadrupole frequency ωQ ~ 105 Mrad/s and η ~ 0.6. However, the major site, in case the complex is inside nanopore having an average pore size of 6 nm, has ωQ ~ 210 Mrad/s and η ~ 0.3. Two different values of PAC parameters corresponding to the major probe sites for the bulk and nano-confined complex, indicate completely different hydration chemistry in the present two cases.

Keywords

Octahydroxohexadecaaquatetrahafnium(IV) complex TDPAC Silica nano pore 

Notes

Acknowledgments

Authors sincerely thank Dr. P. K. Pujari, Associate Director, RC&I Group and Dr. R. Acharya, Head, NA&ACS, RCD of BARC, Mumbai, India for their kind support to pursue the above work. All the members at DHRUVA reactor, BARC, Mumbai, India are also acknowledged for successfully producing the probe nuclei at desired activity level.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Debashis Banerjee
    • 1
    Email author
  • Dhanadeep Dutta
    • 2
    • 3
  • Sk. Wasim Raja
    • 1
  • S. V. Thakare
    • 4
  1. 1.Radiochemistry Division, Bhabha Atomic Research Centre (BARC)Variable Energy Cyclotron CentreKolkataIndia
  2. 2.Radiochemistry DivisionBhabha Atomic Research CentreMumbaiIndia
  3. 3.Homi Bhabha National InstituteMumbaiIndia
  4. 4.Radiopharmaceutical DivisionBhabha Atomic Research CentreMumbaiIndia

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