A MÖSSBAUER STUDY OF THE ELECTRIC HYPERFINE INTERACTION IN K3Fe(CN)6 USING POLARIZED GAMMA RADIATION

1976 ◽  
Vol 37 (C6) ◽  
pp. C6-501-C6-505 ◽  
Author(s):  
M. T. HIRVONEN ◽  
A. P. JAUHO ◽  
T. E. KATILA ◽  
J. A. POHJONEN ◽  
K. J. RISKI
Keyword(s):  
Gamma Radiation ◽  
Hyperfine Interaction ◽  
Mössbauer Study

Mössbauer study of the hyperfine interaction of57FeinY1−sCo5+2sand related compounds

1998 ◽  
Vol 57 (18) ◽  
pp. 11565-11574 ◽  
Author(s):  
M. Forker ◽  
A. Julius ◽  
M. Schulte ◽  
D. Best
Keyword(s):  
Hyperfine Interaction ◽  
Mössbauer Study ◽  
Related Compounds

A study of the electric hyperfine interaction at57Fe in Na3Fe(CN)6�2H2O using polarized recoilless gamma radiation

1982 ◽  
Vol 12 (1) ◽  
pp. 27-38 ◽  
Author(s):  
P. Helist� ◽  
M. T. Hirvonen ◽  
T. Katila ◽  
K. Riski
Keyword(s):  
Gamma Radiation ◽  
Hyperfine Interaction

Mixed hyperfine interaction in amorphous Fe-Zr sputtered films in external magnetic field — A57Fe Mössbauer study

1986 ◽  
Vol 27 (1-4) ◽  
pp. 405-408 ◽  
Author(s):  
S. M. Fries ◽  
C. L. Chien ◽  
J. Crummenauer ◽  
H. -G. Wagner ◽  
U. Gonser
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Hyperfine Interaction ◽  
Mössbauer Study ◽  
Sputtered Films

A Mössbauer study of hyperfine interaction in the systems Co x Mn3−x−y Fe y O4 and Ni x Mn3−x−y Fe y O4

Pramana ◽  
1982 ◽  
Vol 18 (3) ◽  
pp. 243-248 ◽  
Author(s):  
V K Singh ◽  
R Chandra ◽  
S Lokanathan
Keyword(s):  
Hyperfine Interaction ◽  
Mössbauer Study

Mössbauer study of the hyperfine interaction ofAu197in gadolinium

1976 ◽  
Vol 14 (11) ◽  
pp. 4803-4807 ◽  
Author(s):  
B. Perscheid ◽  
H. Büchsler ◽  
M. Forker
Keyword(s):  
Hyperfine Interaction ◽  
Mössbauer Study

Effects of sterilization modes on the mechanical strengths of plaster of paris implants

1989 ◽  
Vol 47 ◽  
pp. 890-891
Author(s):  
K. Cowden ◽  
B. Giammara ◽  
T. Devine ◽  
J. Hanker
Keyword(s):  
Gamma Radiation ◽  
Calcium Sulfate ◽  
Significant Loss ◽  
Potassium Sulfate ◽  
Limiting Factors ◽  
Radiation Sterilization ◽  
Plaster Of Paris ◽  
Hardness Tester ◽  
Dry Heat ◽  
Calcium Sulfate Hemihydrate

Plaster of Paris (calcium sulfate hemihydrate, CaSO4. ½ H2O) has been used as a biomedical implant material since 1892. One of the primary limiting factors of these implants is their mechanical properties. These materials have low compressive and tensile strengths when compared to normal bone. These are important limiting factors where large biomechanical forces exist. Previous work has suggested that sterilization techniques could affect the implant’s strength. A study of plaster of Paris implant mechanical and physical properties to find optimum sterilization techniques therefore, could lead to a significant increase in their application and promise for future use as hard tissue prosthetic materials.USG Medical Grade Calcium Sulfate Hemihydrate Types A, A-1 and B, were sterilized by dry heat and by gamma radiation. Types A and B were additionally sterilized with and without the setting agent potassium sulfate (K2SO4). The plaster mixtures were then moistened with a minimum amount of water and formed into disks (.339 in. diameter x .053 in. deep) in polyethylene molds with a microspatula. After drying, the disks were fractured with a Stokes Hardness Tester. The compressive strengths of the disks were obtained directly from the hardness tester. Values for the maximum tensile strengths σo were then calculated: where (P = applied compression, D = disk diameter, and t = disk thickness). Plaster disks (types A and B) that contained no setting agent showed a significant loss in strength with either dry heat or gamma radiation sterilization. Those that contained potassium sulfate (K2SO4) did not show a significant loss in strength with either sterilization technique. In all comparisons (with and without K2SO4 and with either dry heat or gamma radiation sterilization) the type B plaster had higher compressive and tensile strengths than that of the type A plaster. The type A-1 plaster however, which is specially modified for accelerated setting, was comparable to that of type B with K2SO4 in both compressive and tensile strength (Table 1).

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