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\section*{Books}

\subsection*{Chapters of Books}

\item[1] ``Positron Annihilation Study on Nanocrystalline Copper Thin Films Doped with Nitrogen'', P.\,M. Gordo, M.\,F. Ferreira Marques, M.\,T. Vieira, Materials Design and Applications
series: Advanced Structured Materials {\bf 65} (2017).

\item[2] ``Positron Physics'', A. Pedroso de Lima and P.\,M. Gordo, Nuclear Medicine Physics
CRC Press, Taylor \& Francis group (2011).

\section*{Papers}

\subsection*{International Journals}

\item[3] ``Zr vacancies and their complexes with hydrogen in monoclinic zirconia: formation energies and positron lifetimes'', AG Marinopoulos, PM Gordo, Phys. Scr. {\bf 95(3)}, 035801 (2020).

\item[4] ``Isolated hydrogen configurations in zirconia as seen by muon spin spectroscopy
and ab initio calculations'', R. B. L. Vieira, R. C. Vilão, A. G. Marinopoulos, P. M. Gordo, J. A. Paixão, H. V. Alberto, J. M. Gil, A. Weidinger, R. L. Lichti, B. Baker, P. W. Mengyan:  J. S. Lord, Phys. Rev. B {\bf 94}, 115207(1)-115207(11) (2016).

\item[5] ``Towards very high resolution RPC-PET for small animals'', P. Martins, P. Crespo A. Blanco, M. Kajetanowicz P.\,M. Gordo, Journal Instrumentation {\bf 9} (2014).

\item[6] ``Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps'', R. B. L. Vieira, R. C. Vilão, P. M. Gordo, A. G. Marinopoulos, H. V. Alberto, J. Piroto Duarte, J. M. Gil, A. Weidinger and J. S. Lord, Journal of Physics: Conference Series {\bf 551}, 012050 (2014).

\item[7] ``Epoxide Moisture Absorption Studied by Positron Lifetime Spectroscopy'', J.\,M.\,M. Luís, M. Duarte Naia, M.\,F. Ferreira Marques, J.\,J.\,M. Morais, P.\,M. Gordo, Mat. Sci. Forum {\bf 730-732} (2013).

\item[8] ``Free volumes studies in Thymoquinone and Carvonecyclodextrin nanoparticules by Positron Annihilation Lifetime Spectroscopy'', M.\,F. Ferreira Marques, P.\,M. Gordo, A. Moreira da Silva, Journal of Physics: Conference Series {\bf 443} (2013).

\item[9] ``Free volumes studies in Thymoquinone and Carvonecyclodextrin nanoparticules by Positron Annihilation Lifetime Spectroscopy'', M.\,F. Ferreira Marques, P.\,M. Gordo, A. Moreira da Silva, Journal of Physics: Conference Series {\bf 443} (2013).

\item[10] ``Encapsulation of natural flavors in cyclodextrins: free volume studies by PALS'', M.\,F. Ferreira Marques, S.\,D. Santos, R.\,F. Marques, P.\,M. Gordo, A. Moreira da Silva, Zs. Kajcsos, Mat. Sci. Forum {\bf 733} (2013).

\item[11] ``Positron annihilation lifetime spectroscopy study in epoxy moisture absorption'', P.\,M. Gordo, J.\,M.\,M. Luís, M.\,F. Ferreira Marques, Duarte Naia, J.\,J.\,M. Morais, Journal of Physics: Conference Series {\bf 443} (2013).

\item[12] ``Falling chains as variable mass systems: theoretical model and experimental analysis'', Célia A. de Sousa, Paulo M. Gordo and Pedro Costa, Eur. J. Phys. {\bf 33}, 1007-1020 (2012).

\item[13] ``Preliminary Positron Lifetime Results on Free Volumes in Cyclodextrins'', M.\,F. Ferreira Marques, A.\,M.\,G. Moreira da Silva, P.\,M. Gordo, Zs. Kajcsos, Mater. Sci. Forum {\bf 666} (2011).

\item[14] ``Characterisation of Ti/Al Multilayered Structures with Slow Positron Beams Applying a Simplified Positron Depth Distribution Model'', M. Duarte Naia, P.\,M. Gordo, O.\,M.\,N.\,D. Teodoro, A.\,P. de Lima, A.\,M.\,C. Moutinho, Mat. Sci. Forum {\bf 636-637} (2010).

\item[15] ``Critical Parameter of Positron and Positronium Annihilation in Grainy and Porous Solids: Ionic Crystals and Zeolites'', Zs. Kajcsos, L. Liszkay, G. Duplâtre, L. Varga, L. Lohonyai, C. Kosanovic, S. Bosnar, B. Subotic, K. Lázár, D. Bosnar, K. Havancsák, P.\,M. Gordo, Physica Status Solidi (c) {\bf 6} (2009).

\item[16] ``Free volume studies in polycaprolactone/poli(propylene oxide) urethane/urea membranes by positron lifetime and Doppler spectroscopy'', M.\,F. Ferreira Marques, P.\,M. Gordo, A.\,P. de Lima, D.\,P. Queiroz, M. Norberta de Pinho, P. Major, Zs. Kajcsos, Acta Physica Polonica A {\bf 113} (2008).

\item[17] ``Positron and positronium trapping in heat treated  zeolites (ceramics), the effect of swift heavy ion irradiations'', P. Major, Zs. Kajcsos, L. Liszkay, P. Zalán, C. Kosanovic, S. Bosnar, B. Subotic, K. Lázár, V.\,A. Skuratov, K. Havancsák, P.\,M. Gordo, M.\,F. Ferreira Marques, Acta Physica Polonica A {\bf 113} (2008).

\item[18] ``On the defect pattern evolution in sapphire irradiated by swift ions in a broad fluence range'', P.\,M. Gordo, L. Liszkay, Zs. Kajcsos, K Havancsák, V.\,A. Skuratov, G. Kögel, P. Sperr, W. Egger, A.\,P. de Lima, M.\,F. Ferreira Marques, Applied Surface Science {\bf 255} (2008).

\item[19] ``Study on the structure of defects in a-Si:H films by Positron Annihilation and micro-Raman Spectroscopy'', P.\,M. Gordo, M.\,F. Ferreira Marques, A.\,P. de Lima, Zs. Kajcsos, Acta Physica Polonica A {\bf 113} (2008).

\item[20] ``Development of a Threshold Positron Spectrometer'', M.\,C. A. Lopes, P.\,M. Gordo, A.\,P. de Lima, J.\,R. Mohallem, Rad. Phys. Chemistry {\bf 76} (2007).

\item[21] ``Positron Studies of the Temperature-Dependence of Free-Volumes in Polydimimethysiloxane/Poli (Propylene Oxide) Urethane/Urea'', M.\,F. Ferreira Marques, P.\,M. Gordo, C. Lopes Gil, A.\,P. de Lima, D.\,P. Queiroz, M. Norberta de Pinho, Zs. Kajcsos, Rad. Phys. Chemistry {\bf 76} (2007).

\item[22] ``Positron Annihilation and Constant Photocurrent Method Measurtements on a-Si:H films: a Comparative Approach to Defect Identification'', P.\,M. Gordo, M.\,F. Ferreira Marques, A.\,P. de Lima, G. Lavareda, C. Nunes de Carvalho, A. Amaral, Zs. Kajcsos, Rad. Phys. Chemistry {\bf 76} (2007).

\item[23] ``Positron and Positronium Annihilation Patterns in Zeolites and Bulk Ceramics'', Zs. Kajcsos, C. Kosanovic, L. Liszkay, P. Major, L. Lohonyai, K. Lázar, S. Bosnar, B. Subotic, D. Bosnar, K. Havancsák, P.\,M. Gordo, N. Tomasic, Physica Status Solidi (c) {\bf 4} (2007).

\item[24] ``Competitive Positron and Positronium Trapping in Porous Media'', Zs. Kajcsos, L. Liszkay, G. Duplâtre, K. Lázár, L. Lohonyai, L. Varga, P.\,M. Gordo, A.\,P. de Lima, M.\,F. Ferreira Marques, D. Bosnar, S. Bosnar, C. Kosanovic, B. Subotic, Rad. Phys. Chemistry {\bf 76} (2007).

\item[25] ``-surface Defects Induced by Low Energy Ar+ sputtering of Silver'', Duarte Naia, P.\,M. Gordo, O.\,M.\,N.\,D. Teodoro, A.\,P. de Lima, A.\,M.\,C. Moutinho, R.\,S. Brusa, Mater. Sci. Forum {\bf 514-516} (2006).

\item[26] ``Positronium Trapping in Porous Solids: means and limitations for structural studies'', Zs. Kacjsos, L. Liszkay, G. Duplâtre, L. Varga, L. Lohonyai, F. Pászti, E. Szilágyi, K. Lázár, G. Pál-Borbély, H. K. Beyer, P. Caullet, J. Patarin, M. E. Azenha, P. M. Gordo, C. Lopes Gil, A.\,P. de Lima, M.\,F. Ferreira Marques, Acta Physica Polonica A {\bf 107} (2005).

\item[27] ``Positron Lifetime and Doppler Broadening Study of Defects Created by Swift Ion Irradiation in Sapphire'', L. Liszkay, P.\,M. Gordo, K. Havancsák, V.\,A. Skuratov, A.\,P. de Lima, Zs. Kajcsos, Mater. Sci. Forum {\bf 445-446} (2004).

\item[28] ``Near- Surface Studies on Low-Energy Ion Irradiated Ni Using a Positron Beam'', M. Duarte Naia, P.\,M. Gordo, A. P. de Lima, A. M. C. Moutinho, R. S. Brusa, Mater. Sci. Forum {\bf 445-446} (2004).

\item[29] ``Gas Permeabilty and Temperature-Dependence Free-Volume Studies in Polyurethane Membranes by Positron Lifetime and Doppler Spectroscopies'', M.\,F. Ferreira Marques, P.\,M. Gordo, C. Lopes Gil, A.\,P. de Lima, D. Placco Queiroz, M. Norberta de Pinho, Zs. Kajcsos, G. Duplâtre, Mater. Sci. Forum {\bf 445-446} (2004).

\item[30] ``Positron Annihilation Studies in Amorphous Silicon Nitride'', P.\,M. Gordo, Duarte Naia, C. Lopes Gil, A.\,P. de Lima, G. Lavareda, Nunes de Carvalho e A. Amaral, Mater. Sci. Forum {\bf 445-446} (2004).

\item[31] ``Comparison of Vacancy Creation by Nuclear and Electronic Processes in Silicon Irradiated with Swift Kr and Bi Ions'', P.\,M. Gordo, L. Liszkay, K. Havancsák, V.\,A. Skuratov, P. Sperr, W. Egger, C. Lopes Gil, A.\,P. de Lima, Zs. Kajcsos, Mater. Sci. Forum {\bf 445-446} (2004).

\item[32] ``Positron Lifetime Studies in Vinyl Polymers of Medical Importance'', M.\,F. Ferreira Marques, P.\,M. Gordo, C. Lopes Gil, Zs. Kajcsos, A.\,P. de Lima, D.\,P. Queiroz, M.\,N. de Pinho, Radiation Physics
and Chemistry {\bf 68} (2003).

\item[33] ``Positrons and Positronium in Porous Media: Zeolites'', Zs. Kajcsos, G. Duplâtre, L. Liszkay, K. Lázár, L. Lohonyai, G. Pál-Borbély, H. K. Beyer, P. Caullet, J. Patarin, L. Varga, F. Pászti, A. P. de Lima, C. Lopes Gil, P.\,M. Gordo, M. F. Ferreira Marques, Radiation Physics and Chemistry {\bf 68} (2003).

\item[34] ``Free-Volume Studies in Polyurethane Membranes by Positron Annihilation Spectroscopy'', ”, P.\,M. Gordo M.\,F. Ferreira Marques, Radiation Physics and Chemistry {\bf 68} (2003).

\item[35] ``Influence of the a-Si:H structural defects studied by positron annihilation on the solar cells characteristics'', A. Amaral, G. Lavareda, C. Nunes de Carvalho, P. Brogueira, P.\,M. Gordo, V.\,S. Subrahmanyam, C. Lopes Gil, M. Duarte Naia, A.\,P. de Lima, Thin Solid Films {\bf 403-404} (2002).

\item[36] ``Role of the rf power on the structure of defects in a-Si:H films produced by PECVD'', P.\,M. Gordo, V.\,S. Subrahmanyam, M. Duarte Naia, C. Lopes Gil, A.\,P. de Lima, G. Lavareda, C. Nunes de Carvalho, A. Amaral, Mater. Sci. Forum {\bf 363-365} (2001).

\item[37] ``Positronium Formation and Annihilation in BHDC/Water/Benzene Microemulsions'', V.\,S. Subrahmanyam, M.\,F. Ferreira Marques, P.\,M. Gordo, C. Lopes Gil, and A.\,P. de Lima, Mater. Sci. Forum {\bf 363-365} (2001).

\item[38] ``Positronium Formation and Annihilation in BHDC/Water/Benzene Microemulsions'', V.\,S. Subrahmanyam, M.\,F. Ferreira Marques, P.\,M. Gordo, C. Lopes Gil, and A.\,P. de Lima, Mater. Sci. Forum {\bf 363-365} (0).

\section*{Proceedings}

\subsection*{International Conferences}

\item[39] ``Mechanosynthesis of bcc alloys from Fe50-y/2Co50-y/2Sny mixtures (2 <= y <= 33) and B2 ordering by annealing at modest temperatures'', B. F. O. Costa, B. Malaman, G. Le Caer, P. M. Gordo, A. Ramalho, Hyperfine Interact {\bf 238} (2017).

\item[40] ``Study of Defects in Hydrogenated Amorphous Silicon by Constant Photocurrent Method and Positron Annihilation'', A. Amaral, G. Lavareda, C. Nunes de Carvalho, P. Brogueira, P.\,M. Gordo, V.\,S. Subrahmanyam, C. Lopes Gil, M. Duarte Naia, A.\,P. de Lima, Proceedings of MRS Symposium (2001).

\section*{Communications}

\item[41] ``Towards the application of patterned RPCs to very high resolution RPC-PET for small animals'', Alberto Blanco, Paulo Crespo, M. Fátima Ferreira Marques, Rui Ferreira Marques, Paulo Fonte, Paulo M. Gordo, Marcin Kajetanowicz, Grzegorz Korcyl, Luís Lopes, Paulo Martins, Jan Michel, Marek Palka, Michael Traxler, MPGD Applications Beyond Fundamental Science Workshop and the 18th RD51 Collaboration Meeting (0).

\subsection*{Oral}

\item[42] ``Aprendizagens negativas sobre o som'', T. Esperança, M.\,J. de Almeida, P.\,M. Gordo, Física 2016, 26º Encontro Ibérico para o Ensino da Física, Braga, setembro de 2016. (2016).

\item[43] ``MuSR in cubic stabilised zirconia. New experimental data and analysis in the “separate-traps” model'', R. B. L. Vieira*, R. C. Vilão, P. M. Gordo, A. G. Marinopoulos, H. V. Alberto, J. Piroto Duarte, J. M. Gil, A. Weidinger, J. S. Lord, and S. F. J. Cox, 13th International Conference on Muon Spin Rotation, Relaxation and Resonance (mu SR2014)

1-6 June 2014, Grindelwald, Switzerland. (2014).

\subsection*{Poster}

\item[44] ``Analogias no Ensino da Eletricidade no 9º ano'', T. Esperança, S. Devesa, M.\,J. de Almeida, P.\,M. Gordo, Física 2018 – 21ª Conferência Nacional de Física e 28º Encontro Ibérico para o Ensino da Física {\bf 29 a 31 de agosto e 1 de setembro, Covilhã, Portugal} (2018).

\item[45] ``Development of students’ inquiry skills and of their teachers’ action research attitudes: sound in 8th grade'', M.\,J. Almeida, T. Esperança, P. M. Gordo, Trabalho apresentado em 2nd WCPE, World Conference on Physics
Education (2016).

\item[46] ``Aprendizagens negativas sobre o som'', T. Esperança, M. J. B. M Almeida, P. M. Gordo, Trabalho apresentado em Física 2016 - 20ª Conferência Nacional de física e 26º Encontro Ibérico para o ensino da física (2016).

\item[47] ``Mössbauer spectroscopy studies on supersaturated FeCoSn solid solutions and their ordering by annealing'', B. Malaman, G. Le Caër, B.\,F.\,O. Costa, P.\,M. Gordo, A. Ramalho, Colloquim Spectroscopicum International XXXIX (2015).

\item[48] ``Inquiry for lower secondary school students and their teachers: “Sound”'', T. Esperança, M. J. Almeida, P. M. Gordo, Trabalho apresentado em Hope Annual Forum (2015).

\item[49] ``Positron lifetime spectroscopy studies on moisture absorption and thermal ageing of an epoxy'', J.\,M.\,M. Luís, P. M. Gordo, M.\,F. Ferreira Marques, M. Duarte Naia, José J.\,L. Morais, Colloquim Spectroscopicum International XXXIX (2015).

\item[50] ``Positron Annihilation Studies on Nanocrystalline Copper Thin Films Doped with Nitrogen'', P. M. Gordo, M.\,F. Ferreira Marques, M.\,T. Vieira, Colloquim Spectroscopicum International XXXIX (2015).

\item[51] ``Hydrogen in Yttrium Stabilized Zirconia: A muSR Perspective'', R. B. L. Vieira, R. C. Vilão, P. M. Gordo, A. G. Marinopoulos,a H. V. Alberto, J. M. Gil, A. Weidinger, J. S. Lord,  (2015).

\item[52] ``Som no 8º ano - perspetiva inquiry e reflexão em ação'', T. Esperança, M. J. B. M Almeida, P. M. Gordo, Trabalho apresentado em Física 2014 - 19ª Conferência Nacional de física e 24º Encontro Ibérico para o ensino da física. (2014).

\item[53] ``Experimental Stations to Play with Sound: 8th Grade'', T. Esperança, M. J. B. M. Almeida, P. M. Gordo, Trabalho apresentado em Discover the COSMOSGHOU International Conference on “e-Infrastructures for an Engaging Classroom”, Volos, Greece. (2013).

\end{itemize}
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