Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 23.20.Js  (2)
  • 27.50. + e  (2)
Source
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    TheN=47 shell model nucleus90Tc (1994)
    Springer
    The European physical journal 349 (1994), S. 105-113 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Tg ; 21.60.Cs ; 23.20.Js ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Lifetimes of high spin states in the nucleus90Tc have been measured via the fusion evaporation reactions58Ni(36Ar,3pn)90Tc at 140 MeV and58Ni(35Cl,2pn)90Tc at 120 MeV beam energy. The OSIRIS spectrometer as well as a new neutron-γ-coincidence setup were used to measure lifetimes in the 10−12-10−9 s range by the recoil distance Doppler-shift method. By means ofγ-multiplicity and neutron-gated spectra fifteen lifetimes wered-educed. The experimental branching ratios and transition probabilities are compared to predictions of shell model calculations in a restricted π(p1/2), π(g9/2), ν(p1/2), and ν(g9/2) configuration space. In most cases the agreement with the calculations using the Gross-Frenkel parameters is striking but the results for several yrare states very sensitively depend on the residual interaction used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291167
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Strength functions of primary transitions following thermal neutron capture in strontium (1989)
    Springer
    The European physical journal 332 (1989), S. 397-405 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Js ; 25.40.Lw ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The primaryE1,M1 andE2γ-radiation in87,88,89Sr observed after thermal neutron capture was compared with the predictions of single particle and giant resonance models. The nuclei feature a wide range of neutron binding energies between 6.3 and 11.1 MeV, which makes a 5.5 MeV spectrum of primary transition energies available for investigation. The (n, γ) reaction was used to estimate the parameters of the spin-flip M1 giant resonance in strontium. The total energy weightedM1 strength of this resonance exceeds the results of shell model and random phase approximation calculations for90Zr by a factor of 3–4. TheE1 strengths were found to agree with the established giant dipole resonance model. The few data on primaryE2 transitions do not allow to differentiate between the giant quadrupole resonance and the single particle models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292425
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Double neutron capture in62Ni (1992)
    Springer
    The European physical journal 343 (1992), S. 7-14 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ma ; 23.20.Lv ; 25.40.Lw ; 27.50. + e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The γ-radiation following single and double neutron capture in isotopically enriched62Ni was studied at the high flux reactor of the Institut Laue-Langevin, using a pair and Compton suppressed germanium detector. Measurements before and after 170 d of breeding were performed. The γ-ray fluxes through63Ni and64Ni are discussed; several new levels and spin-parity assignments were found. On the basis of the known discrete levels and the low-energy neutron resonances, level density parameters were determined within the Constant Temperature Fermi Gas model. The neutron binding energies were measured asB n (63Ni)=6837.92(18) keV andB n (64Ni)=9657.64(24) keV. The63Ni (n, γ) cross section for reactor neutrons was measured to be σ=20 −2 +5 b.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291590
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Heavy-ion in-beam studies of the nucleus87Nb (1991)
    Springer
    The European physical journal 340 (1991), S. 125-139 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.R ; 23.20.ck ; 27.50. + e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states in the transitional nucleus87Nb up to 14 MeV excitation have been established for the first time via the reactions40Ca(50Cr, 3p)87Nb and58Ni (32S, 3p)87Nb. The87Nbγ-radiations have been identified throughγ-ray spectra taken in coincidence with the evaporation residues detected in the Daresbury recoil separator or with multiple proton emission. Gamma-gamma coincidences, DCO ratios,γ-ray angular distributions and lifetimes have been measured. A total of some 100 transitions have been placed into a level scheme comprising of sixty states. The one-quasiparticle (1qp) bands of either parity and several other band-like structures have been identified, some containing alignedg 9/2 nucleons. Moderately enhancedE2 in-band transitions of 13–48 W.u. as well as several weakE2 yrast transitions connecting bands with different quasiparticle numbers have been found. Similarities with respect to theN=46 isotones83Rb,84Sr,85Y,86Zr and88Mo are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303824
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...