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Article

Adkins, GS; Cassidy, DB; Perez-Rios, J; (2022) Precision spectroscopy of positronium: Testing bound-state QED theory and the search for physics beyond the Standard Model. Physics Reports , 975 pp. 1-61. 10.1016/j.physrep.2022.05.002. Green open access
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Akopyan, LA; Babij, TJ; Lakhmanskiy, K; Cassidy, DB; Matveev, A; (2021) Line-shape modeling in microwave spectroscopy of the positronium n=2 fine-structure intervals. Physical Review A , 104 (6) , Article 062810. 10.1103/physreva.104.062810. Green open access
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Alonso, AM; Cooper, BS; Deller, A; Cassidy, DB; (2016) Single-shot positron annihilation lifetime spectroscopy with LYSO scintillators. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 828 pp. 163-169. 10.1016/j.nima.2016.05.049. Green open access
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Alonso, AM; Cooper, BS; Deller, A; Gurung, L; Hogan, SD; Cassidy, DB; (2017) Velocity selection of Rydberg positronium using a curved electrostatic guide. Physical Review A , 95 (5) , Article 053409. 10.1103/PhysRevA.95.053409. Green open access
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Alonso, AM; Cooper, BS; Deller, A; Hogan, SD; Cassidy, DB; (2016) Positronium decay from n=2 states in electric and magnetic fields. Physical Review A , 93 (1) , Article 012506. 10.1103/PhysRevA.93.012506. Green open access
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Alonso, AM; Cooper, BS; Deller, A; Hogan, SD; Cassidy, DB; (2015) Controlling Positronium Annihilation with Electric Fields. Physical Review Letters , 115 (18) , Article 183401. 10.1103/PhysRevLett.115.183401. Green open access
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Alonso, AM; Gurung, L; Sukra, BAD; Hogan, SD; Cassidy, DB; (2018) State-selective electric-field ionization of Rydberg positronium. Physical Review A , 98 (5) , Article 053417. 10.1103/PhysRevA.98.053417. Green open access
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Alonso, AM; Hogan, SD; Cassidy, DB; (2017) Production of 2(3) S-1 positronium atoms by single-photon excitation in an electric field. Physical Review A , 95 (3) , Article 033408. 10.1103/PhysRevA.95.033408. Green open access
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Andersen, SL; Cassidy, DB; Chevallier, J; Cooper, BS; Deller, A; Wall, TE; Uggerhøj, UI; (2015) Positronium emission and cooling in reflection and transmission from thin meso-structured silica films. Journal of Physics B: Atomic, Molecular and Optical Physics , 48 (20) 10.1088/0953-4075/48/20/204003. Green open access
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Babij, TJ; Cassidy, DB; (2022) Positronium microwave spectroscopy using Ramsey interferometry. The European Physical Journal D , 76 (7) , Article 121. 10.1140/epjd/s10053-022-00448-w. Green open access
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Cassidy, David; (2023) Precision Microwave Spectroscopy of the Positronium 2 ³S₁ → 2 ³P₂ Interval. Physical Review Letters , 131 (4) , Article 043001. 10.1103/PhysRevLett.131.043001. Green open access
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Cassidy, DB; (2018) Experimental progress in positronium laser physics. European Physical Journal D , 72 (3) , Article 53. 10.1140/epjd/e2018-80721-y. Green open access
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Cassidy, DB; Deng, SHM; Tanaka, HKM; Mills, AP; Greaves, RG; Maruo, T; Nishiyama, N; (2005) Experiments with a high-density positronium gas. Physical Review Letters , 95 (19) , Article 195006. 10.1103/PhysRevLett.95.195006. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; (2012) Positronium hyperfine interval measured via saturated absorption spectroscopy. Physical Review Letters , 109 (7) , Article 073401. 10.1103/PhysRevLett.109.073401. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; (2012) Optical spectroscopy of molecular positronium. Physical Review Letters , 108 (13) , Article 133402. 10.1103/PhysRevLett.108.133402. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; (2011) Photoemission of positronium from Si. Physical Review Letters , 107 (3) , Article 033401. 10.1103/PhysRevLett.107.033401. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; (2011) Laser Excitation of Positronium in the Paschen-Back Regime. Physical Review Letters , 106 (17) , Article 173401. 10.1103/PhysRevLett.106.173401. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; (2011) New mechanism for positronium formation on a silicon surface. Physical Review Letters , 106 (13) , Article 133401. 10.1103/PhysRevLett.106.133401. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; Bromley, MWJ; Cota, LC; (2011) Reply: Cassidy et al. Physical Review Letters , 106 (20) , Article 209302. 10.1103/PhysRevLett.106.209302. Green open access
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Cassidy, DB; Hisakado, TH; Tom, HWK; Mills, AP; Bromley, MWJ; Cota, LC; (2011) Cavity induced shift and narrowing of the positronium Lyman-α transition. Physical Review Letters , 106 (2) , Article e023401. 10.1103/PhysRevLett.106.023401. Green open access
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Cassidy, DB; Meligne, VE; Mills, AP; (2010) Production of a fully spin-polarized ensemble of positronium atoms. Physical Review Letters , 104 (17) , Article 173401. 10.1103/PhysRevLett.104.173401. Green open access
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Cassidy, DB; Mills, AP; (2011) Enhanced Ps-Ps interactions due to quantum confinement. Physical Review Letters , 107 (21) , Article e213401. 10.1103/PhysRevLett.107.213401. Green open access
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Cassidy, DB; Mills, AP; (2009) Comment on "relativistic Positron Creation Using Ultraintense Short Pulse Lasers". Physical Review Letters , 103 (17) , Article e179501. 10.1103/PhysRevLett.103.179501. Green open access
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Cassidy, DB; Mills, AP; (2008) Interactions between positronium atoms in porous silica. Physical Review Letters , 100 (1) , Article 013401. 10.1103/PhysRevLett.100.013401. Green open access
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Cooper, BS; Alonso, AM; Deller, A; Liszkay, L; Cassidy, DB; (2016) Positronium production in cryogenic environments. Physical Review B , 93 (12) , Article 125305. 10.1103/PhysRevB.93.125305. Green open access
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Cooper, BS; Alonso, AM; Deller, A; Wall, TE; Cassidy, DB; (2015) A trap-based pulsed positron beam optimised for positronium laser spectroscopy. Review of Scientific Instruments , 86 (10) , Article 103101. 10.1063/1.4931690. Green open access
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Cooper, BS; Boilot, JP; Corbel, C; Guillemot, F; Gurung, L; Liszkay, L; Cassidy, DB; (2018) Annihilation of positronium atoms confined in mesoporous and macroporous SiO2 films. Physical Review B , 97 (20) , Article 205302. 10.1103/PhysRevB.97.205302. Green open access
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Cortese, E; Cassidy, DB; De Liberato, S; (2023) Positronium density measurements using polaritonic effects. Physical Review A , 107 (2) , Article 023306. 10.1103/PhysRevA.107.023306. Green open access
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Deller, A; Alonso, AM; Cooper, BS; Hogan, SD; Cassidy, DB; (2016) Electrostatically Guided Rydberg Positronium. Physical Review Letters , 117 (7) , Article 073202. 10.1103/PhysRevLett.117.073202. Green open access
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Deller, A; Alonso, AM; Cooper, BS; Hogan, SD; Cassidy, DB; (2016) Measurement of Rydberg positronium fluorescence lifetimes. Physical Review A , 93 (6) , Article 062513. 10.1103/PhysRevA.93.062513. Green open access
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Deller, A; Cooper, BS; Wall, TE; Cassidy, DB; (2015) Positronium emission from mesoporous silica studied by laser-enhanced time-of-flight spectroscopy. New Journal of Physics , 17 , Article 043059. 10.1088/1367-2630/17/4/043059. Green open access
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Gurung, Lokesh; Babij, Tamara J; Cassidy, David B; (2021) Fast decay of 23S1 positronium atoms in an MgO lined cavity. EPJ Techniques and Instrumentation , 8 , Article 3. 10.1140/epjti/s40485-020-00058-z. Green open access
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Gurung, L; Alonso, AM; Babij, TJ; Cooper, BS; Shlugerl, AL; Cassidy, DB; (2019) Positronium emission from MgO smoke nanocrystals. Journal of Physics B: Atomic, Molecular and Optical Physics , 52 (10) , Article 105004. 10.1088/1361-6455/ab0f06. Green open access
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Gurung, L; Babij, TJ; Hogan, SD; Cassidy, DB; (2020) Precision Microwave Spectroscopy of the Positronium n=2 Fine Structure. Physical Review Letters , 125 (7) , Article 073002. 10.1103/physrevlett.125.073002. Green open access
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Gurung, L; Babij, TJ; Pérez-Ríos, J; Hogan, SD; Cassidy, DB; (2021) Observation of asymmetric line shapes in precision microwave spectroscopy of the positronium 2S13→2PJ3 ( J=1,2 ) fine-structure intervals. Physical Review A , 103 (4) , Article 042805. 10.1103/physreva.103.042805. Green open access
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Gurung, L; Cooper, BS; Hogan, SD; Cassidy, DB; (2020) Resonant shifts of positronium energy levels in MgO powder. Physical Review A , 101 (1) , Article 012701. 10.1103/PhysRevA.101.012701. Green open access
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Hunt, AW; Cassidy, DB; Sterne, PA; Cowan, TE; Howell, RH; Lynn, KG; Golevchenko, JA; (2001) Doppler broadening of in-flight positron annihilation radiation due to electron momentum. Physical Review Letters , 86 (24) 5612 - 5615. 10.1103/PhysRevLett.86.5612. Green open access
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Hunt, AW; Cassidy, DB; Sterne, PA; Cowan, TE; Howell, RH; Lynn, KG; Golovchenko, JA; (2001) Erratum: Doppler broadening of in-flight positron annihilation radiation due to electron momentum (Phys. Rev. Lett. (2001) 86 (5612)). Physical Review Letters , 87 (13) , Article e139901. 10.1103/PhysRevLett.87.139901. Green open access
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Marjanović, S; Banković, A; Cassidy, D; Cooper, B; Deller, A; Dujko, S; Petrović, ZL; (2016) A CF 4 based positron trap. Journal of Physics B: Atomic, Molecular and Optical Physics , 49 (21) , Article 215001. 10.1088/0953-4075/49/21/215001. Green open access
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Newson, DM; Babij, TJ; Cassidy, DB; (2023) An energy tunable continuous 23S1 positronium beam. Review of Scientific Instruments , 94 (8) , Article 083201. 10.1063/5.0167125. Green open access
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Rayment, MH; Gurung, L; Sheldon, RE; Hogan, SD; Cassidy, DB; (2019) Multiring electrostatic guide for Rydberg positronium. Physical Review A , 100 (1) , Article 013410. 10.1103/PhysRevA.100.013410. Green open access
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Sheldon, RE; Babij, TJ; Devlin-Hill, BA; Gurung, L; Cassidy, DB; (2020) Measurement of the annihilation decay rate of 2³S₁ positronium. EPL (Europhysics Letters) , 132 (1) , Article 13001. 10.1209/0295-5075/132/13001. Green open access
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Sheldon, RE; Babij, TJ; Reeder, SH; Hogan, SD; Cassidy, DB; (2023) Microwave spectroscopy of positronium atoms in free space. Physical Review A , 107 (4) , Article 042810. 10.1103/physreva.107.042810. Green open access
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Swann, AR; Cassidy, DB; Deller, A; Gribakin, GF; (2016) Formation of positron-atom bound states in collisions between Rydberg Ps and neutral atoms. Physical Review A , 93 (5) , Article 052712. 10.1103/PhysRevA.93.052712. Green open access
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Wall, TE; Alonso, AM; Cooper, BS; Deller, A; Hogan, SD; Cassidy, DB; (2015) Selective production of Rydberg-stark states of positronium. Physical Review Letters , 114 (17) , Article 173001. 10.1103/PhysRevLett.114.173001. Green open access
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Wall, TE; Cassidy, DB; Hogan, SD; (2014) Single-color two-photon spectroscopy of Rydberg states in electric fields. PHYSICAL REVIEW A , 90 (5) , Article ARTN 053430. 10.1103/PhysRevA.90.053430. Green open access
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This list was generated on Sun Jan 11 03:23:39 2026 GMT.