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NSR database version of May 3, 2024.

Search: Author = R.Fass

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1983FA03      Nucl.Instrum.Methods 206, 317 (1983)

R.Fass, P.Lemmertz, L.J.Alquist, H.Wollnik, D.Hirdes, H.Jungclas

On-Line Mass Determination of α-Active Products from the Reaction (nat)U + ²⁰⁸Pb with a Gas Jet Time-of-Flight Mass Spectrometer

NUCLEAR REACTIONS U, Ar(²⁰⁸Pb, αX)¹⁵⁰Dy/¹⁵¹Dy/¹⁵²Dy/¹⁵¹Ho/¹⁵²Ho/^152mHo/¹⁵⁹Hf/¹⁵⁵Yb/¹⁶³W/¹⁵⁹Ta/²⁰⁹At/²⁰⁷At/²¹¹At/²¹⁷At/²¹⁶At/²¹⁵At/²²⁵Ac/¹⁹²Bi/²¹¹Bi/²¹²Bi/^212mBi/²¹⁸Po/²¹⁷Po/²¹⁶Po/²¹¹Po/^211mPo/²¹⁴Po/²¹³Po/²¹²Po/^212mPo/²²¹Fr/²¹²Fr/²¹¹Fr/²¹³Fr/²¹⁹Fr/²¹⁸Fr/²²⁶Th/²²⁵Th/²²³Th/²¹³Ra/²²¹Ra/²²⁴Ra/²²²Ra/²¹⁴Ra/²²⁰Rn/²¹⁷Rn/²¹³Rn, E=7 MeV/nucleon; measured Eα, Iα, αγ-coin, α-recoil masses; deduced production σ ratios, masses for certain residuals. Gas jet Tof mass spectrometer, Ti window, Ar gas thermalization, natural U target.

doi: 10.1016/0167-5087(83)91275-9
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1981LU06      Z.Phys. A303, 115 (1981)

T.Lund, D.Hirdes, H.Jungclas, D.Molzahn, P.Vater, R.Brandt, P.Lemmertz, R.Fass, H.Wollnik, H.Gaggeler

Search for Production of Superheavy Elements via ' Fusion after Instantaneous Fission ' in the Reaction ²³⁸U + ²⁰⁸Pb

RADIOACTIVITY, Fission ²⁵⁴Cf(SF), ^{240,242m,244m}Am(SF) [from ²³⁸U(²⁰⁸Pb, X), E=8 MeV/nucleon]; measured fragment distribution. Gas jet, fission track counting techniques.

NUCLEAR REACTIONS, Fission ²³⁸U(²⁰⁸Pb, X), E=8 MeV/nucleon; measured Eα, Iα, SF fragment distribution, α(fragment)-coin; deduced production yields for ^240,242,244Cm, ²⁵⁴Cf, superheavy production σ. Radiochemical, gas jet, rotating wheel techniques, natural target.

doi: 10.1007/BF01420268
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1980LE27      Z.Phys. A298, 311 (1980)

P.Lemmertz, L.J.Alquist, R.Fass, H.Wollnik, D.Hirdes, H.Jungclas, R.Brandt, D.Schardt, J.Zylicz

Studies on Low Spin Yrast States in ^212mPo

RADIOACTIVITY ²¹²Bi [from U(²⁰⁸Pb, X), E=7 MeV/nucleon]; measured Eγ, Eα, αγ-coin; deduced log ft. ²¹²Po deduced levels, T_1/2, low-spin yrast band, configuration.

doi: 10.1007/BF01425163
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1980SC09      Phys.Lett. 91B, 46 (1980)

U.J.Schrewe, P.Tidemand-Petersson, G.M.Gowdy, R.Kirchner, O.Klepper, A.Plochocki, W.Reisdorf, E.Roeckl, J.L.Wood, J.Zylicz, R.Fass, D.Schardt

Alpha Decay of Neutron-Deficient Isotopes with 78 ≤ Z ≤ 83 Including the New Isotopes ^183,184Pb and ¹⁸⁸Bi

RADIOACTIVITY ^183,184,185Pb, ^182,183,184Hg, ^178,179Pt, ¹⁸³Tl; measured Eα, T_1/2, α-branching ratios, reduced Γα. ¹⁸⁸Bi; measured E(α), T_1/2.

NUCLEAR REACTIONS ^142,146Nd, ¹⁰⁷Ag(⁴⁸Ti, X), (⁸⁴Kr, X), E=4.6-6.3 MeV/nucleon; measured Eα, Iα, T_1/2; deduced evidence for ^183,184Pb, ¹⁸⁸Bi.

doi: 10.1016/0370-2693(80)90659-0
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1978FA16      Nucl.Instrum.Methods 154, 233 (1978)

R.Fass, E.Georg, H.Wollnik, D.Schardt, G.Weiss, K.Wien, D.Hirdes

A Time-of-Flight Mass Spectrometer for Recoil Particles from α-Active Sources Produced by a He-JET

NUCLEAR REACTIONS Ge(⁸⁴Kr, X), E=5.8 MeV/nucleon; measured α(fragment)-coin. ¹⁰³Rh(⁸⁴Kr, X), E not given; measured Eα, Iα; deduced evidence for ^{180,178,177,176}Pt, ^179,178,177Au. Recoil particles tof mass spectrometer.

1978RO19      Phys.Lett. 78B, 393 (1978)

E.Roeckl, R.Kirchner, O.Klepper, G.Nyman, W.Reisdorf, D.Schardt, K.Wien, R.Fass, S.Mattsson

A New Island of α-Emission: α-Decay Energies and Widths of Neutron Deficient Tellurium, Iodine and Xenon Isotopes

RADIOACTIVITY ¹⁰⁸Te, ¹⁰⁹Te, ¹¹⁰I, ¹¹¹I, ¹¹²I, ¹¹²Xe, ¹¹³Xe, ¹¹⁴Cs [from ⁵⁸Ni(⁵⁸Ni, xα)]; measured T_1/2, Eα; deduced Γα, branching ratio, Qα.

doi: 10.1016/0370-2693(78)90468-9
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