Dr Christopher T. Chantler

Who am I?

A lecturer in Physics at The University of Melbourne.

Dr Chris. Chantler
Optics Group
School of Physics (Room 505)
University of Melbourne
Parkville
Victoria, 3052
AUSTRALIA

Phone: +61 (0)3 9344 5437 (Office, Room 505, 5th floor)
       +61 (0)3 9344 0015 (X-ray Lab, Room 560, 5th floor)
       (no phone) (Diffractometer, basement)
       +61 (0)3 9344 5429 (Pelletron, basement)
Fax:   +61 (0)3 9347 4783
URL:     http://optics.ph.unimelb.edu.au/~chantler
e-mail: Chantler@physics.unimelb.edu.au

Research Fields

I have pursued precision tests of Quantum Electrodynamics in atomic systems extensively, and in a series of ranging collaborations have produced several of the most precise measurements of QED in the medium-to-high Z regime. I have been involved in the development of X-ray specroscopy on the novel Electron Beam Ion Trap devices, primarily at NIST.

Some of our theoretical developments in the computation of form factors have resulted in significant deviations from earlier work, which can be tested by suitable experiments. They have been confirmed in selected regions. Here the atomic scattering factor is given for Uranium at medium X-ray energies (keV). Click the figure for the corresponding attenuation coefficients.

X-ray Optics and Atomic Physics

The way that X-rays interact with matter should be well understood. However, deviations between latest theory / computation lies at the 10% level over much of the energy ranges, for most elements. Even for the most investigated elements such as Si, Cu, Ag, Au, the few experiments which claim 1% precision show variation of 5-30%. We are addressing this with synchrotron experiments and with state-of-the-art facilities at U.Melb. Current indications suggest results of 0.1% accuracy - an improvement of two orders of magnitude over previous work. We have the first prototype 18kW CE high-frequency rotating anode in the world, plus several other features ideally suited to X-ray physical investigations.

These issues impact upon X-ray diffraction theory. My diffraction theory is the first dynamical theory for non-ideally imperfect curved crystals (and simpler subclasses) and shows significantly greater agreement for perfect curved crystal profiles than previous work.

My theories of X-ray interaction with photographic emulsions are the current leading models today. Some work has also developed an understanding of other X-ray detectors.

Applications of these ideas have led to new calibration devices for radiography and mammography, now patented in the US as part of the Quantum Metrology Group effort at the National Institute for Standards and Technology, USA.

Research papers

Recent conferences

You may have seen me...

In Perth, U.W.A., Western Australia; in the Clarendon Laboratory, Oxford, U.K.; at the Quantum Metrology Division, N.I.S.T, Gaithersburg, Maryland, USA; GSI, Darmstadt; LBL, Berkeley; APS, Chicago; ANBF, Tsukuba, Japan...

There have been accesses to this page since Jan. 97.

Optics Group

Chris. Chantler, chantler@ph.unimelb.edu.au
Last modified: 24 December 1997
Copyright © 1997 The University of Melbourne

Selected Research Papers

B.Sc. Honours Thesis "Electron density studies", UWA, Perth, Western Australia (1984)

C.T. Chantler, E.N. Maslen, "Charge Transfer and Three-Centre Bonding in Monoprotonated and Diprotonated 2,2'-Bipyridylium closo-Decaboron Hydride," Acta Cryst. B45 (1989), 290-297.

C.T. Chantler, J.D. Silver, "X-ray spectra of recoil ions from fast beam interaction with Mg and MgF2 solid targets" (NIM B31 (1988) 59-69) and

J.M. Laming, C.T. Chantler, J.D. Silver, D.D. Dietrich, E.C. Finch, P.H. Mokler and S.D. Rosner, "A Differential Measurement of the Ground State Lamb Shift in Hydrogenic Germanium, Ge31+," NIM B31 (1988) 21-23

J.D. Silver, C.T. Chantler, "Final Report on Improved Crystal Bending Techniques Applied to the LLNL Dual-Arm Johann mounting X-ray Spectrometer" Re: LLNL # P.O. 2142003 (22/12/87).

C.T. Chantler, "Beam-foil Spectroscopy of highly-ionized atoms, precision measurements of hydrogenic Lamb shifts and x-ray diffraction of curved crystals", D.Phil. Thesis, Oxford, 1990.

C.T. Chantler, "X-ray Diffraction of Bent Crystals in Bragg Geometry I: Perfect Crystal Modelling", J. Appl. Cryst. 25 (1992) 674-693.

C.T. Chantler, "X-ray Diffraction of Bent Crystals in Bragg Geometry II: Non-ideally Imperfect Crystals, Modelling and Results", J. Appl. Cryst. 25 (1992) 694-713.

S.N. Lea, W.A. Hallett, C.T. Chantler, A.J. Varney, P.E.G. Baird, J.D. Silver, A.R. Lee, J. Billowes, "Observation of the 2s Lamb shift in hydrogen-like silicon", ICAP XIII, Munich (Aug. 3-7, 1992).

C.T. Chantler, "Towards improved form factor tables", International Conference on Anomalous Scattering, Malente/Hamburg, Germany (Aug. 17-21, 1992).

C.T. Chantler, "Photographic response to X-ray irradiation I: Estimation of the photographic error statistic, and development of analytic density-intensity relations", Applied Optics 32 (1993) 2371-2397.

C.T. Chantler, "Photographic response to X-ray irradiation II: Correlated models", Applied Optics 32 (1993) 2398-2410.

C.T. Chantler, J.D. Silver, D.D. Dietrich, "Photographic response to X-ray irradiation III: Photographic linearisation of beam-foil spectra", Applied Optics 32 (1993) 2411-2421.

C.T. Chantler, J.M. Laming, J.D. Silver, "Beam-gas recoil spectra of highly ionised neon", NIM B73 (1993) 130-134.

C.T. Chantler, "Improvements in computation of form factors", Radiation Physics and Chemistry (International Journal of Radiation Applications and Instrumentation, Part C) (Invited) 41 (1993) 759-766.

C. T. Chantler, "Developments in computation of form factors", 4th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, Gaithersburg, Maryland, USA (Sept. 14-17, 1992); NIST SP850, eds J. Sugar, D. Leckrone (April 1993), pp23-25.

H. F. Beyer, K. D. Finlayson, D. Liesen, P. Indelicato, C. T. Chantler, R. D. Deslattes, J. Schweppe, F. Bosch, M. Jung, O. Klepper, W. Konig, R. Moshammer, K. Beckert, H. Eickhoff, B. Franzke, A. Gruber, F. Nolden, P. Spadtke, M. Steck, "X-ray transitions associated with electron capture into bare dysprosium", J. Phys. B26 (1993) 1557-1567.

S. N. Lea, W. A. Hallett, A. J. Varney, C. T. Chantler, P. E. G. Baird, J. D. Silver, A. R. Lee, J. Billowes, "Intra-cavity laser resonance spectroscopy of hydrogen-like silicon ions", Phys. Lett. A185 (1994) 327-332.

C. T. Chantler, "Towards improved form factor tables", pp 61-78, Invited review chapter in "Resonant Anomalous X-Ray Scattering. Theory and Applications", G. Materlik, K. Fischer, C.J. Sparks, eds, (Elsevier, North-Holland, 1994).

C. T. Chantler, J.-L. Staudenmann, "Energy Dependences of Absorption in Beryllium Windows and Argon Gas", 5th International Conference on Synchrotron Research Instrumentation, SUNY at Stony Brook, Long Island, NY, July 18-22, 1994.

C. T. Chantler, J.-L. Staudenmann, "Energy Dependences of Absorption in Beryllium Windows and Argon Gas", Rev. Sci. Inst. 66 (1995) 1651-1654.

C.T. Chantler, "Theoretical form factor, attenuation and scattering tabulation for Z=1-92 from E=1-10 eV to E=0.4-1.0 MeV", J. Phys. Chem. Ref. Data 24 (1995), 71-643.

J. D. Gillaspy, Y. Aglitskiy, E.W. Bell, C.M. Brown, C.T. Chantler, R.D. Deslattes, U. Feldman, L.T. Hudson, J.M. Laming, E.S. Meyer, C.A. Morgan, A.I. Pikin, J.R. Roberts, L.P. Ratliff, F.G. Serpa, J. Sugar, E. Takacs, "Overview of the EBIT Program at NIST," Physica Scripta, T59, 392-395 (1995).

F.G. Serpa, E. Takacs, C.A. Morgan, J.R. Roberts, J.D. Gillaspy, C.T. Chantler, L.T. Hudson, R.D. Deslattes, C.M. Brown, J.M. Laming, "Preliminary results from the EBIT at NIST," presented at DAMOP, APS Spring meeting, April 1994.

C. T. Chantler, R. D. Deslattes,"Systematic Corrections in Bragg X-ray Diffraction of Flat and Curved Crystals", invited review paper / monograph, Rev.Sci.Inst. 66, 5123-5147 (1995).

C.T. Chantler, "Erratum: Theoretical Form Factor, Attenuation and Scattering Tabulation for Z=1-92 from E=1-10 eV to E=0.4-1.0 MeV," J. Phys. Chem. Ref. Data 25 (1996) 527-532.

C.T. Chantler, R.D. Deslattes, A. Henins, L.T. Hudson, "Flat and Curved Crystal Spectrography for Mammographic X-ray Sources," British J. Radiology, 69 (1996) 636-649.

Endre Takacs, Eric S. Meyer, John D. Gillaspy, Jim R. Roberts, C.T. Chantler, L.T. Hudson, R.D. Deslattes, Charles M. Brown, J.M. Laming, U. Feldman, J. Dubau, M.K. Inal, "Polarization measurements on a magnetic quadrupole line in Ne-like barium," Phys. Rev. A54 (1996) 1342-1350.

L.T. Hudson, R.D. Deslattes, A. Henins, C.T. Chantler, E.G. Kessler, J.E. Schweppe, "Curved Crystal Spectrometer for Energy Calibration and Spectral Characterization of Mammographic X-ray Sources," Medical Physics 23 (1996) 1659-1670.

C.T. Chantler, D. Paterson, L.T. Hudson, F.G. Serpa, J.D. Gillaspy, R.D. Deslattes, "Progress towards absolute x-ray spectroscopy on the nist electron-beam ion trap: current status and results", Physica Scripta, T73 (1997) 87-89.

D. Paterson, C.T. Chantler, C. Tran, L.T. Hudson, F.G. Serpa, R.D. Deslattes," Absolute calibration of an x-ray spectrometer on the nist electron-beam ion trap: control, design and systematics," Physica Scripta, T73 (1997) 400-402.

C.T. Chantler, Z. Barnea, C.Q. Tran, J. Tiller, D. Paterson,"Precision X-ray optics for fundamental interactions in atomic physics, resolving discrepancies in the X-ray regime," submitted Opt.Quantum Elect.

P.Goodman, S.P. Brumby, W.S. Langer, C.T. Chantler,"The Hanbury Brown-Twiss controversy: a 40-years perspective," submitted Aust.JP

NIST Database 66: FFAST - Form Factor Attenuation Scattering Tables (Version 1.0) July 1995, C.T. Chantler.

Recent Conferences

5th International Conference on Synchrotron Radiation Instrumentation, SUNY at Stony Brook. 18-22 July, 1994
C. T. Chantler, "Progress in Form Factor Tabulations," invited talk, Nineteenth Meeting of the Society of Crystallographers in Australia (Crystal XIX), April 18-21, Ballarat, Victoria, 1995.
"Tests of QED using X-ray Optics," C. T. Chantler, L. T. Hudson, R. D. Deslattes, J. D. Gillaspy, (Invited) talk at Tenth Conference of the Australian Optical Society (AOS 10), University of Queensland, 5-7 July 1995 (Abstracts, ed. W. R. MacGillivray).
"Understanding Interactions of VUV Radiation and X-rays with emulsions," C. T. Chantler, AOS10
"Design and Application of Curved Crystal Optics for High Precision X-ray Spectrometry," D. Paterson, C. Tran, C. T. Chantler, AOS10
Chantler, C.T, Paterson, D.J., HCI-96, Eighth International Conference on the Physics of Highly Charged Ions, Omiya, Saitama, Japan, 23-26 September 1996.
C.T. Chantler, D. Paterson, L.T. Hudson, F.G. Serpa, J.D. Gillaspy, R.D. Deslattes, "Progress towards absolute x-ray spectroscopy on the nist electron-beam ion trap: current status and results," HCI-96.
D. Paterson, C.T. Chantler, C. Tran, L.T. Hudson, F.G. Serpa, J.D. Gillaspy, R.D. Deslattes,"Absolute calibration of an x-ray spectrometer on the nist electron-beam ion trap: control, design and systematics," HCI-96.
11th Conference of the Australian Optical Society, University of Adelaide, South Australia, 10-12 Dec. 1997 [Several presentations]