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  • 1
    Digitale Medien
    Digitale Medien
    Nanosecond lifetimes of the low-spin states in the nucleus ^1^4^7Nd - A particle-rotor model interpretation of the results
    Amsterdam : Elsevier
    Nuclear Physics, Section A 339 (1980), S. 465-476 
    Details
    ISSN: 0375-9474
    Schlagwort(e): Nuclear Reactions
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(80)90027-5
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  • 2
    Digitale Medien
    Digitale Medien
    Level structure of170Er observed in the decay of the 2.76 min170Ho (1978)
    Springer
    The European physical journal 286 (1978), S. 57-63 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract TheΒ −-decay of the longer-lived170Ho isomer produced through the170Er(n, p)170Ho reaction has been investigated by using a versastile detector and coincidence equipment. The half-life andΒ −-decay energy were determined to beT 1/2=2.76±0.05 min andQ β =3.85±0.15 MeV, respectively. In addition to the ground state band and some higher energy levels, the proposed level scheme of170Er contains 11 states between 1.0 and 1.6 MeV (6 new ones), which are connected mutually by previously unknown low-energy transitions. Spin and/or parity assignments based mainly on coincidence data and multipolarity determinations are suggested for most of these states. By using systematic considerations and the nuclear projection model calculations several bands withK≧2 can be assigned tentatively. As a side result the half-life of169Ho was determined to be 4.7 ±0.2 min.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01434613
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  • 3
    Digitale Medien
    Digitale Medien
    Low-energy rotational bands in the nucleus155Eu (1984)
    Springer
    The European physical journal 319 (1984), S. 91-96 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Excited states in the nucleus155Eu have been produced during in-beam bombardments of a154Sm target with3He beams at 22 and 27 MeV. Decay gamma rays were detected using coincidence equipment optimized for low-energy photons. The level scheme is based on the observedγγ-coincidence relationships combined with the information on relative intensities. Tentatively suggested spin assignments follow from the apparent rotational character of the nucleus. Experimental observations are compared with predictions calculated from a particle-rotor model with a nonspheroidal Woods-Saxon potential.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01429772
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  • 4
    Digitale Medien
    Digitale Medien
    In-beam study of excited states in the nucleus150Nd (1980)
    Springer
    The European physical journal 297 (1980), S. 123-128 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Energy levels and decay scheme of the nucleus150Nd produced by using 10 MeV deuterons have been investigated with efficientγ-γ coincidence equipment during an in-beam150Nd bombardment. In addition to the ground band, aK π=0− octupole band is strongly populated allowing the identification of its three lowest members. The assignments of the levels are based on coincidence data and on systematic comparison with the (d, d′) cross sections known from three other doubly-evenN=90 nuclei. The decay properties of the 1/2+ levels in149Nd populated in this study through the (d, tγ) reaction are also discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01421468
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  • 5
    Digitale Medien
    Digitale Medien
    Low-lying levels in the nuclei151Nd and155Sm (1984)
    Springer
    The European physical journal 316 (1984), S. 361-366 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Decay properties of excited states in the151Nd and155Sm nuclei produced by 10 MeV douterons have been investigated with in-beam gamma-gamma-coincidence equipment during bombardment of the150Nd and154Sm targets. The results largely confirm the data obtained earlier for these nuclei. The (d, p γ) reaction channel favors population of odd-parity low-spin levels, whose energies follow the rule of regular band structure for well-deformed nuclei. The level schemes are interpreted with calculations using an axial particle-rotor model with a Woods-Saxon potential.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01439909
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  • 6
    Digitale Medien
    Digitale Medien
    States of167Ho from the decay of neutron rich nuclide167Dy (1977)
    Springer
    The European physical journal 280 (1977), S. 309-316 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Theβ −-decay of 66 167 Dy produced through the fast neutron reaction170Er(n, α)167Dy has been investigated by using several kinds of detectors and a high-capacity two-parameter recording system. The half-life andβ −-decay energy of167Dy were determined to beT 1/2 = 6.20 ± 0.08min andQ β-=2.35±0.06, respectively. The observed level scheme of 67 167 Ho (completely unknown previously) contains 12 states, among them a 6.0±0.1 μsM2 isomer at 259.3 keV. On the basis of theoretical and systematic considerations combined with multipole determinations, the following Nilsson model assignments are proposed for the lowest states of167Ho: 0 keV (7−/2 [523]), 259.3 keV (3+/2[411]), 319.8 keV (5/2 3+/2[411]), 392.5 keV (1+/2[411]), 410.0 keV (3/2 1+/2[411]), 569.7 keV (3−/2{7−/2[523], 2+}). Theβ-decay proceeds mainly to the proposed gamma-vibrational state at 569.7 keV with an anomalously low logft value 5.4, indicating similarity between the microscopic structures of this state and the famous ¦K 0−2¦ gamma vibration of165Ho.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01434358
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  • 7
    Digitale Medien
    Digitale Medien
    Low-lying excitations in the odd-odd nucleus154Eu (1988)
    Springer
    The European physical journal 329 (1988), S. 1-10 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.−k ; 27.70.+q
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The doubly odd nucleus154Eu was produced during in-beam bombardments of a154Sm target with3He and deuteron beams at 27 and 10 MeV. The resulting gamma-rays were investigated using prompt and delayed gamma-gamma-coincidence equipment. The half-life of the isomeric 2+ level was determined as 2.2±0.1 μs. The partial level scheme, including numerous previously unidentified excitations, can be divided into two separate groups of levels. The results provide evidence for the existence of a very regular ground band and two rather regularK=3 level structures, whose configurations are closely related to it. In addition, several rotational sequences built on the band heads with otherK values have been deduced. Our interpretation of the level scheme disagrees with the previous conclusion that theN=91 nucleus154Eu might have a stable deformation only in its ground state configuration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294810
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