Workshops below are currently scheduled for MARC XI. Please see the individual items for additional details. All workshops are draft at this time. Attendees will be polled prior to the conference and the results of the polls may change the workshops that are offered.

Click the title of the workshop to view the organizers and description. If you are interested in developing a workshop, please contact Sam Glover.

1A. Non-Linear Fitting Techniques for Gamma Ray Spectrometry Part I
A fundamentally-different and powerful method of high-resolution gamma spectral analysis will be described and demonstrated. Unlike conventional methods based on the results of an initial peak-search, the non-linear least-squares fitting techniques of Marquardt and Levenberg have been applied to find best fits for radionuclide activities and for the parameters of calibration, efficiency, and multiple attenuation. After a brief discussion of the mathematics of the method, a Windows program known as “VRF” that implements the method will be demonstrated with examples including in-situ uranium and persistent radio-pharmaceutical contaminants. A free introductory version of VRF will be given to those who also attend Part II and bring a laptop.

Organizers
G. Lasche, Snakedance Scientific
C. Cray, Cray Consulting

1B. Non-Linear Fitting Techniques for Gamma Ray Spectrometry Part II
Participants who attended Part I and who bring a laptop will be given a free introductory version of the VRF application so that they can follow along with analysis of practical examples during the workshop and for limited trial use afterwards with the included example spectra. Participants will also be introduced to advanced features of VRF including decay chain analysis, peak summing corrections, thermal neutron capture, charged-particle reactions, non-equilibrium Bateman calculations, isotopic ratios, compounds and mixtures, imported efficiencies, batch processing, simulated spectra, decay during acquisition, decay since collection, report generation, user logging, adding or editing gamma sources, VRF Significance MDA, and more.

Organizers
G. Lasche, Snakedance Scientific
C. Cray, Cray Consulting