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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4827
DTSTART:20180420T220000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T225259Z
LAST-MODIFIED:20180416T191557Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Measurements of branching fractions using Fourier transform an
 d grating spectroscopy\, JIMFEST 2018\, Gillian Nave\, National Instit
 ute of Standards and Technology
DESCRIPTION:The measurement of lifetimes using laser-induced fluoresce
 nce at the University of Wisconsin-Madison has been one of the most pr
 oductive experiments in the measurement of atomic spectroscopic data. 
 The NIST bibliographic database on Atomic Transition Probabilities lis
 ts over 60 papers with Jim Lawler as an author or coauthor on lifetime
 s of neutral and singly-ionized elements ranging from carbon to mercur
 y. The applications of these measurements range from astrophysics to l
 ighting research. However\, it is necessary to combine these lifetimes
  with branching fractions in order to obtain the atomic transition pro
 babilities\, and these branching fractions are now frequently the limi
 ting factor in the accuracy of the measurements. I shall describe how 
 the combination of measurements of branching fractions using Fourier t
 ransform spectroscopy at  NIST with those of weak lines using the UW e
 chelle spectrograph can improve the reliability of these measurements 
 and provide the atomic data for weak lines that are challenging to mea
 sure using Fourier transform spectroscopy alone.
URL:https://www.physics.wisc.edu/events/?id=4827
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