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NSR database version of April 27, 2024.

Search: Author = U.Keyser

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2002BU09      Nucl.Instrum.Methods Phys.Res. A481, 330 (2002)

I.Busch, H.Greupner, U.Keyser

Absolute Measurement of the Activity of ²²²Rn using a Proportional Counter

RADIOACTIVITY ²²²Rn, ^214,218Po(α); measured Eα. Method for determining absolute activity discussed.

doi: 10.1016/S0168-9002(01)01360-2
Citations: PlumX Metrics

2001PA52      Hyperfine Interactions 132, 189 (2001)

A.Paul, S.Rottger, A.Zimbal, U.Keyser

Prompt (n, γ) Mass Measurements for the AVOGADRO Project

NUCLEAR REACTIONS ^28,29,30,31Si(n, γ), E=thermal; measured prompt Eγ, Iγ; deduced mass differences. Application to mass unit definition discussed.

doi: 10.1023/A:1011982830022
Citations: PlumX Metrics

1998PA35      Eur.Phys.J. A 2, 417 (1998)

A.Paul, U.Keyser

Adsorption of Radioactive Ions on Carnauba-Wax Aerosols

RADIOACTIVITY ²⁵²Cf(SF); measured Eγ, Iγ following fission; deduced fission products adsorption in carnauba-wax aerosol, dependence on aerosol size distribution.

doi: 10.1007/s100500050139
Citations: PlumX Metrics

1997RO26      IEEE Trans.Instrum.Meas. 46, 560 (1997)

S.Rottger, A.Paul, U.Keyser

Prompt (n, γ)-Spectrometry for the Isotopic Analysis of Silicon Crystals for the Avogadro Project

NUCLEAR REACTIONS ¹H, ¹⁴N, ^28,29Si, ⁵⁶Fe, ²⁷Al, ⁶³Cu(n, γ), E=thermal; measured Eγ, Iγ.

ATOMIC MASSES ^1,2H, ^14,15N, ^{28,29,30,31,32}Si, ^56,57Fe; measured neutron-induced γ spectra; deduced mass differences.

doi: 10.1109/19.571913
Citations: PlumX Metrics

1992BA28      Z.Phys. A342, 125 (1992)

K.Balog, M.Graefenstedt, M.Gross, P.Jurgens, U.Keyser, F.Munnich, T.Otto, F.Schreiber, T.Winkelmann, J.Wulff, and the ISOLDE Collaboration

Experimental Beta-Decay Energies of Very Neutron-Rich Isobars with Mass Numbers A = 101 and A = 102

RADIOACTIVITY ¹⁰¹Rb(β^-); ^102,101Sr(β^-); ^101,102Y(β^-); measured βγ-coin, Kurieplot; deduced Qβ, two-neutron separation energies, masses.

doi: 10.1007/BF01288459
Citations: PlumX Metrics

1992GR06      Nucl.Instrum.Methods Phys.Res. A311, 512 (1992)

M.Gross, P.Jurgens, U.Keyser, S.Kluge, M.Mehrtens, S.Muller, F.Munnich, J.Wulff, H.R.Faust

Determination of High Q(β)-Values by Beta-Gamma-Coincidence Measurements with a Plastic Scintillator Telescope

RADIOACTIVITY ⁹²Kr(β^-); ¹³⁹I(β^-); ¹³⁹Xe(β^-) [from ¹³⁹I-decay]; measured β-spectra endpoint energies, βγ-coin; deduced Qβ. Plastic scintillator telescope.

doi: 10.1016/0168-9002(92)90649-O
Citations: PlumX Metrics

1990GR10      Z.Phys. A336, 247 (1990)

M.Graefenstedt, P.Jurgens, U.Keyser, F.Munnich, F.Schreiber, K.Balog, T.Winkelmann, H.R.Faust, B.Pfeiffer

Beta Decay Energies and Nuclear Masses of ¹⁴⁸Ba, ¹⁴⁸La and ¹⁵¹Pr

RADIOACTIVITY ¹⁴⁸Ba, ¹⁴⁸La, ¹⁵¹Pr(β^-); measured Eβ, Iβ, Eγ, Iγ, βγ-coin; deduced Qβ, Ba, La, Ce, Pr isotope mass differences.

1989GR03      Nucl.Phys. A491, 373 (1989)

M.Graefenstedt, U.Keyser, F.Munnich, F.Schreiber, and the ISOLDE Collaboration

Experimental Beta-Decay Energies of ^91,92Br

RADIOACTIVITY ^91,92Br, ^91,92Kr [from U(p, X)]; measured E(β), I(β), I(γ), E(γ), βγ-coin, Q(β). ^91,92Br deduced masses.

doi: 10.1016/0375-9474(89)90573-3
Citations: PlumX Metrics

1989GR23      Z.Phys. A334, 239 (1989)

M.Graefenstedt, P.Jurgens, U.Keyser, F.Munnich, F.Schreiber, K.Balog, T.Winkelmann, H.R.Faust

Experimental Beta-Decay Energies of Very Neutron-Rich Fission Products with 107 ≤ A ≤ 109

RADIOACTIVITY ¹⁰⁷Mo, ^108,109,107Tc, ^107,108,109Ru, ¹⁰⁸Rh(β^-n); measured βγ-coin, β-endpoint energies; deduced Qβ, mass excess, two-neutron separation energies.

1987GR18      Z.Phys. A327, 383 (1987)

M.Graefenstedt, U.Keyser, F.Munnich, F.Schreiber, H.R.Faust, H.Weikard

Nuclear Structure Effects in the Mass Region Around A = 100, Derived from Experimental Q(β)-Values

RADIOACTIVITY ^101,102,103Zr, ^{101,102,103,104,105}Nb, ^{103,104,105,106}Mo, ^104,105,106Tc(β^-); measured β-endpoint energies, Q(β). ^101,102,103Zr, ^{101,102,103,104,105}Nb, ^{103,104,105,106}Mo, ^104,105,106Tc deduced two-neutron, two-proton separation energies, mass excesses. Mass separator, plastic scintillator telescope, Ge(Li) detector.

1987GR39      Verh.Deut.Phys.Ges. 22, IV, PG-81 (1987)

M.Graefenstedt, U.Keyser, F.Munnich, F.Schreiber, H.R.Faust, U.Stohlker

Measurement of the Q_β-values of ^87-90Br and ⁸⁷Se

1986GR11      Z.Phys. A324, 15 (1986)

M.Graefenstedt, U.Keyser, F.Munnich, B.Pahlmann, B.Pfeiffer, H.Weikard

Beta-Decay Energies of Neutron-Rich Nuclei in the Mass Region 142 ≤ A ≤ 150

RADIOACTIVITY ¹⁴⁶Cs, ^146,147Ba, ^146,147La, ¹⁴⁷Ce(β^-); measured βγ-coin, β-endpoint energies, Eβ, Iβ; deduced Qβ. ^143,144,145Ba, ¹⁴⁵Cs, ^144,145La, ¹⁴⁵Ce deduced Qβ, mass excess. ^148,149,150Ce, ^148,150Pr deduced Qβ. ^142,146Ce, ^142,143,146La, ^142,146Ba, ^{142,143,144,146}Cs deduced mass excess. Other data input.

1986KE10      Radiat.Eff. 94, 39 (1986)

U.Keyser, F.Munnich, B.Pahlmann, M.Graefenstedt, H.Faust, H.Weikard

Experimental Beta-Decay Energies of very Neutron-Rich Light Fission Products

RADIOACTIVITY ⁹⁰Br, ^101,102,103Zr, ^{101,102,103,104,105}Nb, ^{103,104,105,106}Mo, ^104,105,106Tc(β^-); measured βγ-coin; deduced Qβ.

doi: 10.1080/00337578608208350
Citations: PlumX Metrics

1985KE10      Z.Phys. A322, 529 (1985)

U.Keyser

Investigation of the Integral Beta-Spectra of ²³⁵U(n(th), f)- and ²³⁹Pu(n(th), f)-Fission Products

NUCLEAR REACTIONS ²³⁵U, ²³⁹Pu(n, F), E=thermal; measured fission fragment sum β-spectra; deduced ratio.

doi: 10.1007/BF01412092
Citations: PlumX Metrics

1984PA19      Z.Phys. A318, 371 (1984)

B.Pahlmann, M.Graefenstedt, U.Keyser, F.Munnich, B.Pfeiffer, H.Weikard

Q(β)-Values and Masses of Neutron-Rich Nuclei with A = 99 and 100

RADIOACTIVITY ⁹⁹Rb, ^99,100Sr, ^99,100Y, ^99,100Zr, ¹⁰⁰Nb(β^-); measured Qβ, βγ-coin, β-endpoint energies. ¹⁰⁰Sr, ¹⁰⁰Y deduced mass excess, shape characteristics. ⁹⁹Rb, ⁹⁹Sr deduced mass excess.

doi: 10.1007/BF01418098
Citations: PlumX Metrics

1983KE09      Z.Phys. A313, 251 (1983)

U.Keyser, F.Munnich, B.Pahlmann, B.Pfeiffer, H.Weikard

Beta-Decay Energy and Nuclear Mass of ¹⁰⁰Nb

RADIOACTIVITY ¹⁰⁰Nb(β^-) [from ¹⁰⁰Zr(β-decay)]; measured βγ-coin, Eβ, β-endpoint energies; deduced Q, nuclear shape characteritics, two-neutron binding energy.

doi: 10.1007/BF01417238
Citations: PlumX Metrics

1982PA24      Z.Phys. A308, 345 (1982)

B.Pahlmann, U.Keyser, F.Munnich, B.Pfeiffer

Beta-Decay Energies and Nuclear Masses of very Neutron-Rich Rb and Cs Isotopes

RADIOACTIVITY ^{94,95,96,97,98}Rb(β^-); ^{142,143,144,145,146}Cs(β^-); measured βγ-coin, β-endpoint energies; deduced Qβ, mass excess. On-line mass separated sources, plastic scintillator β-telescope.

doi: 10.1007/BF01415883
Citations: PlumX Metrics

1981KE07      Z.Phys. A300, 249 (1981)

U.Keyser, F.Munnich, B.Pahlmann, B.Pfeiffer

Experimental Beta-Decay Energies of very Neutron-Rich Cs Isotopes

RADIOACTIVITY ^{142,143,144,145,146}Cs [from fission product isotope separator]; measured Eβ, Qβ; deduced mass excess. Ge(Li), plastic scintillator detectors, βγ-coin technique.

doi: 10.1007/BF01412301
Citations: PlumX Metrics

1979KE02      Z.Phys. A289, 407 (1979)

U.Keyser, H.Berg, F.Munnich, K.Hawerkamp, H.Schrader, B.Pfeiffer, E.Monnand

Experimental Beta-Decay Energies of Several Neutron-Rich Nuclides with Mass Number 131 < A < 146

RADIOACTIVITY ¹³¹Sn, ¹³⁴Sb, ^135,136Te, ^143,146Ba, ¹⁴⁶La; measured Eβ; deduced Qβ. Comparison with mass formulae.

doi: 10.1007/BF01409393
Citations: PlumX Metrics

1978BE51      Z.Phys. A288, 59 (1978)

H.Berg, U.Keyser, F.Munnich, K.Hawerkamp, H.Schrader, B.Pfeiffer

Experimental Qβ-Values of Several Short-Lived Nuclides with Mass Number 85 ≤ A ≤ 103

RADIOACTIVITY ^85,86Se, ⁹⁰Br, ⁹³Kr, ¹⁰³Nb, ¹⁰³Tc; measured Eβ, βγ-coin; deduced Q.

doi: 10.1007/BF01408202
Citations: PlumX Metrics