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4 results on '"I(ce)"'

1. Nuclear structure effects in the internal conversion of the 114 and 138 keV M1-transitions in 175Lu

Author

A. P. Lashko and T. N. Lashko

Subjects
radioactivity, 175Hf, HPGe-detectors, magnetic spectrometer, measurements I(γ), I(ce), internal conversion, penetration parameter, Atomic physics. Constitution and properties of matter, QC170-197
Abstract

Conversion-line and γ-ray intensities from the decay of 175Hf (T1/2 = 70 days) have been measured with π√2 magnetic β-spectrometer and two coaxial HPGe-detectors. The values of the internal conversion coefficient αK and penetration parameter λ for intraband magnetic dipole transitions γ114 and γ138 keV in 175Lu were determined.

Published
2015

2. NUCLEAR STRUCTURE EFFECTS IN THE INTERNAL CONVERSION OF THE 114 and 138 keV M1-TRANSITIONS IN 175Lu.

Author

Lashko, A. P. and Lashko, T. N.

Abstract

Conversion-line and γ-ray intensities from the decay of 175Hf (T1/2 = 70 days) have been measured with π√2 magnetic β-spectrometer and two coaxial HPGe-detectors. The values of the internal conversion coefficient aK and penetration parameter λ for intraband magnetic dipole transitions γ114 and γ138 keV in 175Lu were determined. [ABSTRACT FROM AUTHOR]

Published
2015
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3. The nuclear structure of 229Th.

Author

Gulda, K., Kurcewicz, W., Aas, A. J., Borge, M. J. G., Burke, D. G., Fogelberg, B., Grant, I. S., Hagebø, E., Kaffrell, N., Kvasil, J., Løvhøiden, G., Mach, H., Mackova, A., Martinez, T., Nyman, G., Rubio, B., Tain, J. L., Tengblad, O., and Thorsteinsen, T. F.

Subjects
*NUCLEAR structure, *GAMMA rays
Abstract

The γ-rays following the β− decay of 229Ac have been investigated by means of γ-ray singles and γγ-coincidence measurements using Ge detectors. Multipolarities of 40 transitions in 229Th have been established by measuring conversion electrons with a mini-orange electron spectrometer. The half-lives of the 146.35, 164.53 and 261.96 keV levels have been measured using the advanced time delayed βγγ(t) method. The low-lying states in 229Th and observed transition rates have been interpreted within the quasiparticle–phonon model with inclusion of Coriolis coupling. Two octupole correlated parity partner bands, with Kπ=5/2± and Kπ=3/2±, were identified in 229Th. [Copyright &y& Elsevier]

Published
2002
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4. Spectroscopy of No-253 and its daughters

Author

Lopez-Martens, A., Wiborg-Hagen, T., Hauschild, K., Chelnokov, M.L, Chepigin, Vi, Curien, D., Dorvaux, O., Drafta, G., Gall, B., Gorgen, A., Guttormsen, M., Kabachenko, A.P, Katrasev, D.E, Kutsarova, T., Kuznetsov, A.N, Larsen, A.C, Malyshev, O.N, Minkova, A., Mullins, S., Nyhus, H.T, Pantelica, D., Piot, J., Popeko, A.G, Saro, S., Scintee, N., Siem, S., Syed, N.U.H, Sokol, E.A, Svirikhin, A.I, Yeremin, A.V, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
2n), (Ca-48, multipolarities, I-gamma, pi, Q(alpha). No-253, measured E-alpha, alpha gamma, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], NUCLEAR REACTIONS Pb-207(Ca-48, deduced levels, 3n) E=220 MeV, T-1/2, E-gamma, E(ce), I(ce), (FM)-F-249, alpha(ce)-coin, I-alpha, deduced ICCs
Abstract

New high-statistics data have been obtained on the decay properties of No-253 and its daughters using the reaction Pb-207(Ca-48, 2n)No-253. This was made possible thanks to an improved transmission of fusion evaporation residues through the VASSILISSA recoil separator and an increased efficiency of the GABRIELA detector setup. The decay schemes of No-253 and Fm-249 have been revisited. The known level scheme of Fm-249 has been confirmed, including a new level at 669 keV excitation energy. The observation of L X-rays in coincidence with the a decay of Fm-249 gives additional support to the ground-state configuration of 1/2(+)[631] instead of 5/2(+)[622] for Cf-245. In both Fm-249 and Cf-245, the interpretation of the data has been checked by comparing experimental a-particle and gamma-ray spectra with realistic simulations of the decay cascades and of the interaction of particles and photons in the detectors of GABRIELA. The population of a 0.7 ms isomeric state attributed to No-253 is confirmed by an a-tagged calorimetric measurement and the corresponding gamma and electron decay spectra are presented. Possible evidence for more than one isomer is given and a tentative partial decay scheme is discussed in the light of the available experimental data, systematics and theoretical expectations. (C) 2011 Elsevier B.V. All rights reserved.

Published
2011
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