Coherent and incoherent pumping of a gamma ray laser with intense optical radiation
Both the coherent and incoherent pumping with intense optical radiation of electromagnetic transitions in nuclei were modeled in this work. In the first case the anti-Stokes upconversion of conventional laser radiation was shown to be a potentially viable means for pumping a ..gamma..-ray laser. With the most favorable possible arrangement of nuclear energy levels, the threshold for stimulated output at 10 keV might be reached at a few tens of Joules for isomeric media with lifetimes of the order of tens of years. Whether such an arrangement of excited states actually exists will require additional experimentation. In the case of the incoherent pumping of nuclear material, the resonant excitation of energetic states of nuclei by x radiation from laser plasmas or exploding wires was modeled with results similar to those for the case of coherent pumping. Thresholds for stimulated output could be as low as a few hundred Joules into the primary laser pulse producing the x-ray flash. Again the possibilities were found to be critically dependent upon unknown parameters, particularly upon the efficiency for the conversion of input energy into x rays. The overall possibilities for the excitation of a ..gamma..-ray laser with optical pumping were concluded to be reasonably encouraging and the need for additional spectroscopic data was clearly defined.
- Research Organization:
- Center for Quantum Electronics, The University of Texas at Dallas, P. O. Box 688, Richardson, Texas 75080
- OSTI ID:
- 5287492
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 53:7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Proof of the feasibility of coherent and incoherent schemes for pumping a gamma-ray laser. Quarterly progress report, 1 April-30 June 1988
Proof of the feasibility of coherent and incoherent schemes for pumping a gamma-ray laser. Annual letter report, 24 December 1991-23 December 1992
Related Subjects
GASERS
MATHEMATICAL MODELS
OPTICAL PUMPING
COHERENT RADIATION
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
KEV RANGE
LASER RADIATION
LIFETIME
PARAMETRIC ANALYSIS
PLASMA
STIMULATED EMISSION
THEORETICAL DATA
X RADIATION
DATA
EMISSION
ENERGY RANGE
INFORMATION
IONIZING RADIATIONS
NUMERICAL DATA
PUMPING
RADIATIONS
420300* - Engineering- Lasers- (-1989)