[seminar] Seminar FO, Brajesh Pandey

[hbuljan at phy.hr]

Poštovani kolege,

Podsjećam na današnje predavanje,

Srdačan pozdrav
Hrvoje Buljan

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SEMINAR FIZIČKOG ODSJEKA
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Vrijeme:   utorak, 19. 04. 2011., 14:15 sati (točno)
Mjesto:     Fizički odsjek, Bijenička c. 32, predavaonica F201

Mössbauer Spectroscopy: Principles and Applications

                Brajesh Pandey
    Department of Physics, Faculty of Science,
 University of Zagreb, Bijenicka C. 32, Zagreb, Croatia,

Nearly fifty years ago Rudolf L Mössbauer, whilst working on his doctoral
thesis under Professor Maier-Leibnitz in Heidelberg, discovered the
recoilless nuclear resonance absorption of gamma rays which became known
as the Mössbauer Effect. The phenomenon rapidly developed to a new
spectroscopic technique which now bears his name.

“Mössbauer’s discovery that γ-ray emission and absorption
can occur in a recoil-free fashion might have seemed at first glance to be
no more than just an interesting new phenomenon.  However, as soon as it
became generally realized that the Mössbauer resonance line is extremely
narrow and allows hyperfine interactions to be resolved and evaluated in a
rather straightforward way, this handy new method created an avalanche of
research activity.  Within a few years nearly all disciplines in the
natural sciences enjoyed a boom in the application of Mössbauer
spectroscopy.  Some journals were swamped to such an extent that
editorials were written to limit the publication of Mössbauer
results…..Rudolf Mössbauer’s concluding remark concerning the
effect that bears his name in his Nobel Laureate speech of December 1961
has proved to be correct and has retained its significance to the present
day; it can also be regarded as a prognosis for the future.

Mössbauer spectroscopy has been used in the different branches of natural
sciences to draw conclusions about the bonding, internal structure and
different hyperfine interaction viz. electric field gradient and hyperfine
magnetic fields. We will discuss its applications on some geological
Cretaceous-Tertiary (KT) boundary samples containing iron minerals.

				Voditelj seminara FO
				Hrvoje Buljan, hbuljan at phy.hr
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