0000000001302914
AUTHOR
H. Kunz
showing 20 related works from this author
A compact apparatus for mass selective resonance ionization spectroscopy in a buffer gas cell
1997
Abstract An ultra-sensitive laser spectroscopic method for the investigation of transuranium nuclides has been developed based on resonance ionization in an argon buffer gas cell. This method has been combined with ion-guide extraction and mass selective direct detection of the resonantly ionized atoms. Using argon as a buffer gas, recoils of fusion reactions can be thermalized even at low pressure. The differential pumping system consists of only one roots pump and two turbo molecular pumps. The set-up has been tested with 243 Am evaporated from a filament located inside the optical gas cell. Resonance ionization is performed using a two-step excitation with an excimer-dye-laser combinatio…
Radiation detected resonance ionization spectroscopy on208Tl and242fAm
1993
An ultra-sensitive laser spectroscopic method has been developed for the hyperfine spectroscopy of short-lived isotopes far off stability produced by heavy ion induced nuclear reactions at very weak intensity (> 1/s). It is based on resonance ionization spectroscopy in a buffer gas cell with radiation detection of the ionization process (RADRIS). As a first on-line application of RADRIS optical spectroscopy at242fAm fission isomers is in progress at the low target production rate of 10/s. The resonance ionization has been performed in two steps utilizing an excimer dye laser combination with a repetition rate of 300 Hz. The first resonant step proceeds through terms which correspond to wave…
Isotope Shift Measurements for Superdeformed Fission Isomeric States
1998
Optical isotope shift measurements have been performed for the ${}^{240,242}{\mathrm{Am}}^{f}$ fission isomers with low target production rates of $10{\mathrm{s}}^{\ensuremath{-}1}$ employing resonance ionization spectroscopy in a buffer gas cell. Isotope shift ratios ${\mathrm{IS}}^{240f,241}/{\mathrm{IS}}^{243,241}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}39.2(8)$ and ${\mathrm{IS}}^{242f,241}/{\mathrm{IS}}^{243,241}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}41.4(8)$ have been measured at the 500.02 nm transition. A difference in the nuclear mean charge radii $\ensuremath{\delta}〈{r}^{2}{〉}_{\mathrm{opt}}^{242f,241}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}5.34(2…
Isotope shift and hyperfine structure measurements at the242f Am fission isomer
1996
Istope shift and hyperfine structure measurements have been performed for the242fAm fission isomer with target production rates of only a few per second. The method is based on resonance ionization spectroscopy (RIS) in a buffer gas cell with radioactive decay detection of the ionization process (RADRIS). A relative isotope shift ratioX exp=IS242f,241/ IS243,241=41.7±0.9 has been measured for the 500.02 nm transition corresponding to a nuclear parameter Λ242f,241=5.4±0.3 fm2. The analysis of the quadrupole moment based on the deformed Fermi-model of the nuclear charge distribution including second order corrections results inQ 20=38.2 ±1.4( −0.8 +0.4 )model eb. The measurement of the hyperf…
First observation of a resonance ionization signal on242mAm fission isomers
1992
The feasibility of a hyperfine spectroscopy on242mAm fission isomers has been demonstrated at the low target production rate of 10/s. The experimental method employed is based on resonance ionization spectroscopy in a buffer gas cell with detection of the ionization process by means of the fission decay of the isomers. The resonance ionization has been performed in two steps, utilizing an excimer dye laser combination with a repetition rate of 300 Hz. The first resonant step proceeds through theJ=7/2 term at 21440.35 cm−1, which has been excited with the tuncable dye laser beam of a wavelength of 466.28 nm, the second non-resonant step is achieved with the 351 nm radiation of the excimer la…
CCDC 104808: Experimental Crystal Structure Determination
2000
Related Article: S.Deloisy, H.Kunz|1998|Tetrahedron Lett.|39|791|doi:10.1016/S0040-4039(97)10720-1
CCDC 678698: Experimental Crystal Structure Determination
2009
Related Article: S.Elzner, D.Schmidt, D.Schollmeyer, G.Erkel, T.Anke, H.Kleinert, U.Forstermann, H.Kunz|2008|ChemMedChem|3|924|doi:10.1002/cmdc.200800022
CCDC 250616: Experimental Crystal Structure Determination
2005
Related Article: C.Becker, C.Hoben, D.Schollmeyer, G.Scherr, H.Kunz|2005|Eur.J.Org.Chem.|2005|1497|doi:10.1002/ejoc.200500044
CCDC 678696: Experimental Crystal Structure Determination
2009
Related Article: S.Elzner, D.Schmidt, D.Schollmeyer, G.Erkel, T.Anke, H.Kleinert, U.Forstermann, H.Kunz|2008|ChemMedChem|3|924|doi:10.1002/cmdc.200800022
CCDC 165221: Experimental Crystal Structure Determination
2002
Related Article: M.Follmann, A.Rosch, E.Klegraf, H.Kunz|2001|Synlett||1569|doi:10.1055/s-2001-17460
CCDC 624381: Experimental Crystal Structure Determination
2007
Related Article: B.Kranke, H.Kunz|2007|Org.Biomol.Chem.|5|349|doi:10.1039/b615113b
CCDC 678697: Experimental Crystal Structure Determination
2009
Related Article: S.Elzner, D.Schmidt, D.Schollmeyer, G.Erkel, T.Anke, H.Kleinert, U.Forstermann, H.Kunz|2008|ChemMedChem|3|924|doi:10.1002/cmdc.200800022
CCDC 237631: Experimental Crystal Structure Determination
2005
Related Article: E.Klegraf, M.Follmann, D.Schollmeyer, H.Kunz|2004|Eur.J.Org.Chem.|2004|3346|doi:10.1002/ejoc.200400169
CCDC 109406: Experimental Crystal Structure Determination
1999
Related Article: M.Weymann, M.Schultz-Kukula, H.Kunz|1998|Tetrahedron Lett.|39|7835|doi:10.1016/S0040-4039(98)01745-6
CCDC 619295: Experimental Crystal Structure Determination
2008
Related Article: M.Negru, D.Schollmeyer, H.Kunz|2007|Angew.Chem.,Int.Ed.|46|9339|doi:10.1002/anie.200703179
CCDC 229786: Experimental Crystal Structure Determination
2004
Related Article: B.Kranke, D.Hebrault, M.Schultz-Kukula, H.Kunz|2004|Synlett|2004|671|doi:10.1055/s-2004-817775
CCDC 229785: Experimental Crystal Structure Determination
2004
Related Article: B.Kranke, D.Hebrault, M.Schultz-Kukula, H.Kunz|2004|Synlett|2004|671|doi:10.1055/s-2004-817775
CCDC 237632: Experimental Crystal Structure Determination
2005
Related Article: E.Klegraf, M.Follmann, D.Schollmeyer, H.Kunz|2004|Eur.J.Org.Chem.|2004|3346|doi:10.1002/ejoc.200400169
CCDC 283243: Experimental Crystal Structure Determination
2006
Related Article: E.Klegraf, S.Knauer, H.Kunz|2006|Angew.Chem.,Int.Ed.|45|2623|doi:10.1002/anie.200504090
CCDC 136523: Experimental Crystal Structure Determination
2001
Related Article: P.Allef, H.Kunz|2000|Tetrahedron:Asymm.|11|375|doi:10.1016/S0957-4166(99)00541-8