g. golovin, d. uryupina, r.volkov, and a. savelev faculty of physics and international laser center...
DESCRIPTION
target electrons ions radiation 0 1TRANSCRIPT
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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
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The main question:
Is a table-top instrument for nuclear physics real?
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fsnmcmWI
5080010 217
Femtosecond laser-induced plasma
target
electrons
ions
radiat
ion
keV15
MeV
keV15keVTaE
keVTmE
keVFeE
2.6)(
4.8)(
4.14)(
181
169
57
0
1
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Main features of plasma-based nuclear instrument Simple Low-cost 3-in-1: electrons, ions, and radiation Direct excitation of low-laying nuclear
levels
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Task formulationExcite nuclei with the help of plasma, created by the powerful fs-laser impulse, and detect its deexcitation.
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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
1
0AtomNucle
us
14,4 keV
7,2 keV
57Fe
6 8 10 12 140
1
2
3
4
Ampli
tude
(a. u
.)
Energy (keV)
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Experimental setup
21710
,8.0,50,2
cmWI
mkmfsmJW
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Plasma characterization
81
21
1
1
,
FeFe
CC
O
H
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ResultsSignal from MKP Electron current (W=const)
target Fe
targe
t 57Fe
p Fe3+Fe2+Fe1+
plasmacreation
keVqWmean 26
e,γ
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Results
12 13 14 150,01
0,02
0,03
0,04
0,05
Elec
trons
per
shot
Energy (keV)
6 8 10 12 14 16
0,005
0,010
0,015
0,020
0,025
0,030
Elec
trons
per
shot
Energy (keV)
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Discussion
Atom Nucleus57Fe
14,4 keV
7,2 keV
0,8 keV
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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