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AbstractAbstract
[en] Short note. 8 refs
Original Title
Beta-raspad nejtronoizbytochnykh yader i problemy nukleosinteza
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Secondary Subject
Source
Joint Inst. for Nuclear Research, Dubna (USSR); 88 p; 1989; p. 37; International conference on selected problems in nucleus structure; Dubna (USSR); 20-24 Jun 1989
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Report
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Conference
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AbstractAbstract
[en] Polarizations of nucleons in decay of 5HeΛ → 4He+p+π-, 4HΛ → 3H+p+π- and 4HΛ → 3He+n+π- hypernuclei are considered. The effect of strong final state interaction is taken into account. The considerable role of resonance interaction in the p-4He system when forming proton polarization in 5HeΛ decay is predicted. In 4HΛ → 3H+p+π- decay the components of proton polarization are also shown to reach considerable values, whereas in charge-exchange 4HΛ → 3He+n+π- decay of neutron polarizartion is expected tobe small
Original Title
Polyarizatsii chastits pri raspadakh giperyader 5HeΛ i 4HΛ
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Record Type
Journal Article
Journal
Izvestiya Vysshikh Uchebnykh Zavedenij, Fizika; ISSN 0021-3411;
; CODEN IVUFA; v. 31(10); p. 100-103

Country of publication
ALPHA DECAY RADIOISOTOPES, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BOSONS, CATIONS, CHARGED PARTICLES, DECAY, DISTRIBUTION, ELEMENTARY PARTICLES, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, FERMIONS, HADRONS, HELIUM ISOTOPES, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, HYDROGEN ISOTOPES, HYPERONS, INTERACTIONS, IONS, ISOTOPES, LAMBDA BARYONS, LIGHT NUCLEI, MESONS, NUCLEI, NUCLEONS, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, ORIENTATION, PIONS, PSEUDOSCALAR MESONS, RADIOISOTOPES, STABLE ISOTOPES, STRANGE PARTICLES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] New properties of isomultiplets are found making use of the theory of complex values of the Coulomb coupling constant. In particular, the following rule is formulated: the energies of decay or separation of the isomultiplet terms into a charged cluster and terms of the corresponding daughter isomultiplet are equidistant. This rule is well fulfilled for isomultiplets with A ≤ 60. Extrapolating these equidistance rules to heavy nuclei the excitation energies Ex of double isobar analogue states are found for the nuclei 197,199Hg, 205Pb, 205-209Po, 209At and 238Pu. Comparison of the calculated Ex value with the experimental one for the 208Po nucleus shows that the suggested method is reliable and well correct
Original Title
Ehnergii vozbuzhdeniya dvojnykh izobar-analogovykh sostoyanij v tyazhelykh yadrakh
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Journal Article
Literature Type
Numerical Data
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AbstractAbstract
[en] A model of the second-order phase transition is developed for determination of the lifetime of quasistationary states of hadronic systems. The model is based on a high-presicion description of the wave function in the inner domain of the configurational space. The level widths of quasistationary states of various systems are calculated and compared with experimental data
Original Title
Metod uglovykh potentsial'nykh funktsij. Vremya zhizni kvazistatsionarnykh sostoyanij
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Journal Article
Literature Type
Numerical Data
Journal
Country of publication
BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DECAY, ELEMENTARY PARTICLES, FERMIONS, FUNCTIONS, HADRONS, HYDROGEN ISOTOPES, INFORMATION, ISOTOPES, LIGHT NUCLEI, LITHIUM ISOTOPES, NUCLEI, NUCLEONS, NUMERICAL DATA, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, STABLE ISOTOPES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
No abstract available
Original Title
Struktura rentgenovskikh LX-spektrov Pb i Np
Primary Subject
Source
AN SSSR, Moscow; Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow; AN Azerbajdzhanskoj SSR, Baku; Ministerstvo Vysshego i Srednego Spetsial'nogo Obrazovaniya Azerbajdzhanskoj SSR, Baku; Azerbajdzhanskij Gosudarstvennyj Univ., Baku (USSR); p. 269-270; 1988; p. 269-270; 38. All-union conference on nuclear spectroscopy and nuclear structure; Baku (USSR); 12-14 Apr 1988; Short note.
Record Type
Miscellaneous
Literature Type
Conference; Numerical Data
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Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, AMERICIUM ISOTOPES, AMPLITUDES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BISMUTH ISOTOPES, DATA, DATA PROCESSING, DECAY, ELECTROMAGNETIC RADIATION, ELECTRON CAPTURE RADIOISOTOPES, ELECTRONIC STRUCTURE, EVEN-ODD NUCLEI, HEAVY NUCLEI, INFORMATION, IONIZING RADIATIONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LEAD ISOTOPES, NEPTUNIUM ISOTOPES, NUCLEI, NUMERICAL DATA, ODD-EVEN NUCLEI, RADIATIONS, RADIOISOTOPES, SPECTRA, STABLE ISOTOPES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] Spectra of low energy conversion electrons emitted in the decay of 57Co, 169Yb and 201Tl were analysed on a combined electrostatic spectrometer. High energy part of the measured conversion lines was approximated by folding a Lorentz distribution (FWHM=Γ) with a Gaussian one (FWHM=R) describing an instrumental line shape. The value of R was determined from the evaluation of the K-14.4 keV conversion line of 57Fe where the value of Γ is well known. R=4.9 eV and R=6.8 eV have been obtained at different operational conditions of the spectrometer. The values of natural widths of Tm atomic levels obtained from measurements Γ(K)=35.5(3) eV, Γ(L1)=4.4(3) eV, Γ(L2)=4.0(4) eV, Γ(L3)=4.0(5) eV, Γ(M1)=13.9(3) eV, Γ(M2)=9.2(8) eV, Γ(M3)=9.5(12) eV are in good agreement with both the results of X-ray measurements and the semiempirical data
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
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Country of publication
BETA DECAY RADIOISOTOPES, COBALT ISOTOPES, DATA, DAYS LIVING RADIOISOTOPES, DECAY, ELECTRON CAPTURE RADIOISOTOPES, ENERGY RANGE, EVALUATION, EVEN-ODD NUCLEI, FUNCTIONS, HEAVY NUCLEI, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, KEV RANGE, MEASURING INSTRUMENTS, NUCLEAR DECAY, NUCLEI, NUMERICAL DATA, ODD-EVEN NUCLEI, RADIOISOTOPES, RARE EARTH NUCLEI, SECONDS LIVING RADIOISOTOPES, SPECTROMETERS, THALLIUM ISOTOPES, YTTERBIUM ISOTOPES
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[en] The radiation fields of alpha-sources of different configurations are studied. Results for the alpha-fields of a point, linear, disc and thick plane source in vacuum or in material medium are presented. The intensity of the radiation in a fixed space point is defined either by the number of alpha-particles passing through the unit area around this point per unit time, or by the energy brought by the alpha-particles in this point per unit time. Analytical formulae allowing reasonable accuracy of estimated calculations for the needs of practice are presented. In the case of evaluating the number of particles the accuracy is higher than 4%
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Journal Article
Literature Type
Numerical Data
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AbstractAbstract
[en] The main results of the analytical superasymmetric fission model, describing in a unified manner cluster radioactivities, alpha-decay and cold fission processes, are briefly reviewed. Predicted halflives for 14C, 24,25,26Ne, 28,30Mg and 32Si radioactivities in the range 1011-1026 s and the corresponding branching ratios relative to α-decay 10-16-10-9 have been experimentally confirmed within 1.5 orders of magnitude. (orig.)
Primary Subject
Source
International conference: Fifty years research in nuclear fission; Berlin (Germany, F.R.); 3-7 Apr 1989
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Journal Article
Literature Type
Conference; Progress Report
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[en] The absolute lifetimes of the four decay modes of /sup 234/U, namely α, Ne, and Mg decay, and spontaneous fission, are calculated within the superfluid tunneling model. It is found that a number of particles, of the order of twice the reduced mass of the two residual nuclei are moved around in the different processes. These particles belong to the condensed phase of the system and display, in their coherent motion, an inertia that is controlled by the pairing gap of the system, as well as by the number of nucleons participating. The model gives an overall account of the data, reproducing the observed lifetimes within two to three orders of magnitude
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Journal Article
Journal
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ACTINIDE NUCLEI, ALKALINE EARTH METALS, ALPHA DECAY RADIOISOTOPES, DECAY, DEFORMATION, ELEMENTS, EVEN-EVEN NUCLEI, FISSION, FUNCTIONS, HEAVY NUCLEI, ISOTOPES, MATHEMATICAL MODELS, MATHEMATICAL SPACE, METALS, NONMETALS, NUCLEAR MODELS, NUCLEAR REACTIONS, NUCLEI, RADIOISOTOPES, RARE GASES, SPACE, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] Explicite expressions for the overlap integrals corresponding to C-12, C-14 and O-16 emission in the independent particle model with harmonic oscillator selfconsistent field are obtained. (authors)
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