phosphorescence

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Introduction

Light emission from relaxation of a triplet excited state to a singlet ground state. Lifetime of the excited state is typically 10E-04 to 10 seconds. Electron energies are split in the excited state with application of a magnetic field. Lifetime of the excited state is prolonged because transition to the ground state is 'forbidden'.

The emitted radiation is of a longer wavelength radiation than that absorbed, continuing after the incident radiation has been removed.

Distinguish from fluorescence.

Additional terms

References

  1. Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 58
  2. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999