G. Golovin , D. Uryupina , R.Volkov , and A. Savel’ev

Registration of 14.4 keV 57Fe nuclear state excitation induced with the help of plasma created by the powerful femtosecond laser pulseG. Golovin, D. Uryupina, R.Volkov, and A. Savel’ev

Faculty of Physics and International Laser Center of Lomonosov Moscow State University

Moscow, Russia

The main question:

Is a table-top instrument for nuclear physics real?

fsnmcmWI

5080010 217

Femtosecond laser-induced plasma

target

electrons

radiat

keV15keVTaE

keVTmE

keVFeE

4.14)(

Main features of plasma-based nuclear instrument Simple Low-cost 3-in-1: electrons, ions, and radiation Direct excitation of low-laying nuclear

levels

Task formulationExcite nuclei with the help of plasma, created by the powerful fs-laser impulse, and detect its deexcitation.

Deexcitation mechanismShell K1 L1 L2 L3 M1 M2 M3 M4 M5 N1

Bond energy, eV 7179 883 758 744 116 79 73 17 16 7

0AtomNucle

14,4 keV

7,2 keV

6 8 10 12 140

Energy (keV)

Experimental setup

,8.0,50,2

mkmfsmJW

Plasma characterization

ResultsSignal from MKP Electron current (W=const)

target Fe

t 57Fe

p Fe3+Fe2+Fe1+

plasmacreation

keVqWmean 26

Results

12 13 14 150,01

Energy (keV)

6 8 10 12 14 16

Energy (keV)

Discussion

Atom Nucleus57Fe

14,4 keV

7,2 keV

0,8 keV

Conclusions

Conversional deexcitation of 14.4 keV 57Fe nuclear state excited with the help of plasma created by the powerful femtosecond laser pulse was detected.

Thank you for attention

G. Golovin , D. Uryupina , R.Volkov , and A. Savel’ev

Documents

Transcript of G. Golovin , D. Uryupina , R.Volkov , and A. Savel’ev

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