Optimum thickness of Mössbauer absorber

Optimum thickness of Mössbauer absorber 1 first-author 1 1 Department of Physics of Wuhan University, Wuhan 430072 Department of Physics of Wuhan University, Wuhan 430072 If recoilless fraction f a is available, the optimum absorber thickness d opt can be calculated by maximizing the signal to noise ratio or Q factor. In this work, an approach presented is to get experimental Q exp as a function of the thickness, and then fitting Q exp by its theoretical expression gives f a value. At last the d opt value is deduced from a maximum on the fitted curve. In such a way, thicknesses of six specimens with quadrupole or magnetic hyperfine splitting were optimized. Mössbauer spectrum Optimum thickness Signal to noise ratio References Raucourt D G . Nucl Instr Meth , 1989 , B44 : 199 Nucl Instr Meth Shimony U . Nucl Instr Meth , 1965 , 37 : 348 Nucl Instr Meth Plamey P J . Nucl Instr Meth , 1977 , 142 : 553 Nucl Instr Meth Weisman L D , Swartzendruber L J , Bennett L H . In: Measurement of Physical Properties , Passaglia E ed. New York : John Wiley and Sons , 1973 , 392 Measurement of Physical Properties Bancroft M . Mössbauer spectroscopy . London : McGraw-Hill Book Company Limited , 1973 , 57 Mössbauer spectroscopy Sarma P R , Prakash V , Tripathi K C . Nucl Instr Meth , 1980 , 178 : 167 Nucl Instr Meth Long J , Cranshaw T E , Longworth G . MERDJ , 1983 , 6 ( 2 ): 42 MERDJ Housley R M , Erickson N E , Dash J G . Nucl Instr Meth , 1964 , 27 : 33 Nucl Instr Meth Kolk B , Bleloch A L , Hall D B . Hyp Inter , 1986 , 29 : 1377 Hyp Inter Grant R W , Housley R M , Gonser U . Phys Rev , 1969 , 178 : 525 Phys Rev Herber R H , Wertheim G K . In: The Mössbauer Effect , Compton D M J , Schoen A H ed. New York : John Wiley and Sons Inc , 1962 , 107 The Mössbauer Effect Erist R D , Wilson D R , Herber R H . J Am Chem Soc , 1984 , 106 : 1646 J Am Chem Soc Herber R H . In: Chemical Mössbauer Spectroscopy , Herber R H ed. New York : Pleum Press , 1984 , 199 Chemical Mössbauer Spectroscopy O481.4 1999-09-28 2000-05-01 2021-02-05 2000 Nuclear Science and Techniques 2 11