Gerhard Randers-Pehrson
Associate Director & Senior Physicist

  Research Interests
  • Microbeam facilities

  • Radiation biology

  • Substance detection

Contact Information

Gerhard Randers-Pehrson
Columbia University/RARAF
PO Box 21
Irvington, NY 10032

Tel: (914) 591-9244
Fax: (914) 591-9405


Academic Training  

Undergraduate: B.S., Physics, Rensselaer Polytechnic Institute, Troy, NY, 1966

Graduate: Ph.D., Nuclear Physics, University of Maryland, College Park, MD, 1979


Current Academic and Professional Appointments  

Current Research  

Gerhard Randers-Pehrson has been the lead designer and integrator of the systems that comprise the RARAF Microbeam facilities. His intent is to provide state of the art irradiation systems that are flexible enough to meet the changing experimental protocols that we and the users of the facility devise.

Randers-Pehrson’s second broad area of interest is the application of techniques developed here to the problems of homeland security. Specifically, upgrading the imaging systems used for the microbeam to vastly upgrade the scoring speed of micronuclei for biodosimetry in the event of a “dirty bomb” or nuclear event. He is also developing a baggage screening system based on accelerator techniques for which he holds a patent with Dr. Brenner.


Curriculum Vitae  

Click here to download a full CV (requires Adobe Acrobat Reader)


Select Publications Online  

Single copies of the articles can be downloaded and printed for the reader's personal research and study for informational purposes only.

Bigelow A.W., Garty G., Funayama T., Randers-Pehrson G., Brenner D.J. and Geard C. Expanding the question-answering potential for charged-particle, single-cell microbeams. (Submitted to Radiation Research)

Garty G., Chen Y., Salerno A., Turner H., Zhang J., Lyulko O.V., Xu Y., Wang H., Simaan N., Randers-Pehrson G., Yao Y.L., Amundson S.A. and Brenner D.J. The RABIT: A Rapid Automated Biodosimetry Tool for radiological triage. (Submitted to Health Physics)

Bigelow A.W., Brenner D.J., Garty G. and Randers-Pehrson G. Single-particle/single-cell ion microbeams as probes of biological mechanisms. IEEE Trans. Plasma Sci. 36:1424-1431 (2008). [PDF 307KB]

Bigelow A.W., Geard C.R., Randers-Pehrson G. and Brenner D.J. Microbeam-Integrated Multiphoton Imaging System. Rev. Sci. Instrum. 79: 123707 (2008). [abstract] [PDF 624KB]

Ponnaiya B., Jenkins-Baker G., Randers-Pherson G. and Geard C.R. Quantifying a bystander response following microbeam irradiation using single-cell RT-PCR analyses. Exp Hematol 35:64-8 (2007). [abstract]

Miller A.C., Stewart M., Rivas R., Marino S., Randers-Pehrson G., and Shi L. Observation of radiation-specific damage in cells exposed to depleted uranium: hprt gene mutation frequency. Radiat. Meas. 42: 1029-1032 (2007).

Salerno A., Zhang J., Bhatla A., Lyulko O.V., Nie J., Dutta A., Garty G., Simaan N., Randers-Pehrson G., Yao Y.L. and Brenner D.J. Design Considerations for a Minimally Invasive High-Throughput Automation System for Radiation Biodosimetry. In Proceedings of the Third Annual IEEE Conference on Automation Science and Engineering (CASE), Scottsdale, AZ, September 2007, pp. 846-852. [PDF 2.12MB]

Garty G., Ross G.J., Bigelow A.W., Randers-Pehrson G. and Brenner D.J. Testing the stand-alone microbeam at Columbia University. Radiation Protection Dosimetry 122(1-4):292-296 (2006). [PDF174KB]

Garty G., Ross G.J., Bigelow A.W., Schettino G., Randers-Pehrson G. and Brenner D.J. Status of the Stand-Alone Microbeam at Columbia University. Radiation Research, 166(4): 656 (2006).

Ross G.J., Bigelow A.W., Randers-Pehrson G., Peng C.C. and Brenner D.J. Phase-based cell imaging techniques for microbeam irradiations. Nucl. Instrum. Methods Phys. Res. B 241:387-391 (2005). [PDF 225KB]

Garty G., Ross G.J., Bigelow A., Randers-Pehrson G. and Brenner D.J. A microbeam irradiator without an accelerator. Nucl. Instrum. Methods Phys. Res. B 241  392-396 (2005). [PDF 203 KB]

Bigelow A.W., Randers-Pehrson G., Kelly R.P. and Brenner D.J. Laser ion source for Columbia University's microbeam. Nucl. Instrum. Methods Phys. Res. B 241: 874-879 (2005). [PDF 261KB]

Garty G., Randers-Pehrson G. and Brenner D.J. Development of a secondary-electron ion-microscope for microbeam diagnostics. Nucl. Instrum. Methods Phys. Res. B 231:60-64 (2005) [PDF 309KB]

Bigelow A.W., Ross G.J., Randers-Pehrson G. and Brenner D.J. The Columbia University Microbeam II endstation for cell imaging and irradiation. Nucl. Instrum. Methods Phys. Res. B 231:202-206 (2005) [PDF 190KB]

Ross G.J., Garty G., Randers-Pehrson G. and Brenner D.J. A single-particle/single-cell microbeam based on an isotopic alpha source. Nucl. Instrum. Methods Phys. Res. B 231:207-211 (2005) [PDF 301KB]

Belyakov O.V., Mitchell S.A., Parikh D., Randers-Pehrson G., Marino S.A., Amundson S.A., Geard C.R. and Brenner D.J. Biological effects in unirradiated human tissue induced by radiation damage up to 1 mm away. PNAS 102:14203-14208 (2005) [abstract] [PDF 675 KB]

Ponnaiya B., Jenkins-Baker G., Brenner D.J., Hall E.J., Randers-Pehrson G. and Geard C.R. Biological responses in known bystander cells relative to known microbeam-irradiated cells. Radiat. Res. 162:426-432 (2004). [abstract] [PDF 148 KB]

Mitchell S.A., Randers-Pehrson G., Brenner D.J. and Hall E.J. The Bystander Response in C3H 10T(1/2) Cells: The Influence of Cell-to-Cell Contact. Radiat. Res. 161:397-401 (2004). [abstract] [PDF 89 KB]

Zhou H., Randers-Pehrson G., Geard C.R., Brenner D.J., Hall E.J. and Hei T.K. Interaction between radiation-induced adaptive response and bystander mutagenesis in mammalian cells. Radiat. Res. 160:512-516 (2003). [abstract] [PDF 243 KB]

Brenner D.J., Sawant S.G., Hande M.P., Miller R.C., Elliston C.D., Fu Z., Randers-Pehrson G. and Marino SA. Routine screening mammography: how important is the radiation-risk side of the benefit-risk equation? Int. J. Radiat. Biol. 78:1065-1067 (2002) [abstract] [PDF 125 KB]

Randers-Pehrson G., Geard C.R., Johnson G., Elliston C.D. and Brenner D.J. The Columbia University single-ion microbeam. Radiat. Res. 156:210-214 (2001). [abstract] [PDF 278 KB]

Sawant S.G., Randers-Pehrson G., Geard C.R., Brenner D.J. and Hall E.J. The bystander effect in radiation oncogenesis I. Transformation in C3H 10T1/2 cells in vitro can be initiated in the unirradiated neighbors of irradiated cells. Radiat. Res. 155:397-401 (2001). [abstract] [PDF 142 KB]

Dymnikov A.D., Brenner D.J., Johnson G. and Randers-Pehrson G. Theoretical study of short electrostatic lens for the Columbia ion microprobe. Rev. Sci. Instr. 71:1646-1650 (2000). [abstract] [PDF 126 KB]

Miller R.C., Randers-Pehrson G., Geard C.R., Hall E.J., and Brenner D.J. The oncogenic transforming potential of the passage of single alpha particles through mammalian cell nuclei. Proc. Nat. Acad. Sci. USA 96:18-22 (1999). [abstract] [PDF 158 KB]

Randers-Pehrson G. and Brenner D.J. A practical target system for accelerator-based BNCT which may effectively double the dose rate. Med. Phys. 25:894-6 (1998). [abstract] [PDF 70 KB]

Brenner D.J., Hall E.J., Randers-Pehrson G., Huang Y., Johnson G.W., Miller R.W., Wu B., Vazquez M.E., Medvedovsky C. and Worgul B.V. Quantitative comparisons of continuous and pulsed low dose-rate regimens in a model late-effect system. Int. J. Radiat. Oncol. Biol. Phys. 34:905-910 (1996). [abstract] [PDF 494 KB]


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