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Hofstra, P.
Vrije Univ., Amsterdam (Netherlands)1979
Vrije Univ., Amsterdam (Netherlands)1979
AbstractAbstract
[en] The author presents calculations for low energy properties of nuclei with an odd number of particles. These are described in the Broken-Pair approximation, where it is assumed that all but three particles occur as ordered Cooper pairs; the unpaired (one or three) particles are called quasiparticles. A model is developed with which it is hoped to describe odd nuclei with two open shells in terms of both single-particle and collective degrees of freedom. (Auth.)
Primary Subject
Source
1979; 109 p; Proefschrift (Dr.).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
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INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Nederlandse Natuurkundige Vereniging, Utrecht. Sectie Kernfysica; p. 7; Oct 1977; p. 7; Autumn meeting 1977; Petten, Netherlands; 28 Oct 1977; Published in summary form only.
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Miscellaneous
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Conference
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INIS IssueINIS Issue
AbstractAbstract
[en] The low-energy properties of 89Y, 91Nb and 93Tc are described in a broken-pair model. The shell model space for the protons consists of one major shell and for the neutrons particle-hole states within two major shells are taken into account. The effective interaction is assumed to be a simple Gaussian Serber force, which has proved to be the most successful in adjacent even nuclei. Energy spectra up to about 3 MeV excitation energy and one-nucleon transfer data can be described very well. Also electromagnetic properties can be reproduced rather well if reasonable effective charges are used. No indication for deformed states, as found in Sn nuclei, is observed. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Z. Phys., A; v. 292(2); p. 159-169
Country of publication
BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, DATA, DATA FORMS, DAYS LIVING RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, HOURS LIVING RADIOISOTOPES, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MATHEMATICAL MODELS, MINUTES LIVING RADIOISOTOPES, NIOBIUM ISOTOPES, NUCLEAR MODELS, NUCLEI, NUMERICAL DATA, ODD-EVEN NUCLEI, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTRA, STABLE ISOTOPES, TECHNETIUM ISOTOPES, YEARS LIVING RADIOISOTOPES, YTTRIUM ISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Nederlandse Natuurkundige Vereniging, Amsterdam; p. 43; 1976; Voorjaarsvergadering; Amsterdam, Netherlands; 26 Apr 1976; Published in summary form only.
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Report
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Conference
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INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Nederlandse Natuurkundige Vereniging, Amsterdam; p. 18; Mar 1978; p. 18; Spring meeting of the Dutch Physical Society; Utrecht, Netherlands; 30 Mar 1978; Published in summary form only.
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Miscellaneous
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Conference
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Record Type
Journal Article
Journal
Nuclear Physics. A; v. 236(1); p. 10-12
Country of publication
BORN APPROXIMATION, CROSS SECTIONS, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, EVEN-EVEN NUCLEI, FERMIONS, FUNCTIONS, INTERMEDIATE MASS NUCLEI, ISOTOPES, LEPTON REACTIONS, LEPTONS, MATHEMATICAL MODELS, MEV RANGE, MOLYBDENUM ISOTOPES, NUCLEAR MODELS, NUCLEAR REACTIONS, NUCLEI, SCATTERING, STABLE ISOTOPES, TARGETS
Reference NumberReference Number
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INIS IssueINIS Issue
AbstractAbstract
[en] An account is given of the description of the low-energy properties of the odd Sn nuclei in terms of number projected one- (1q.p.) and three-quasiparticle (3q.p.) states. The shell model space for the neutrons consists of one major shell. A simple Gaussian force is used as an effective interaction. Its strength and the single-particle energies, which are the only parameters, are derived in a consistent way from spectroscopie data on the one-quasiparticle states. We find that the spectra can be well interpreted in terms of 1q.p. and 3q.p. states. Branching ratios of gamma decay, one-nucleon transfer spectroscopic factors, electric and magnetic moments show generally good agreement with the experimental data. For half-lives and mixing ratios, which are most sensitive to details of the 3q.p. components, the agreement is less, but all have the correct order of magnitude. (orig.)
[de]
Es wird ueber die Beschreibung der niederenergetischen Eigenschaften der ungeradzahligen Sn-Kerne in Termen der zahlenprojezierten ein- (1q.p.) und drei-Quasiteilchenzustaende berichtet. Der Schalenmodellraum der Neutronen besteht aus einer Hauptschale. Als effektive Wechselwirkung wird eine einfache Gauss-Kraft benutzt. Ihre Staerke und die Einteilchenenergien, welche die einzigen Parameter sind, werden in konsistenter Weise aus den spektroskopischen Daten ueber die ein- Quasisteilchenzustaende abgeleitet. Es zeigt sich, dass die Spektren gut in Termen von 1.q.p. und 3.q.p.-Zustaenden interpretiert werden koennen. Die Verzweigungsverhaeltnisse des Gammazerfalls, die spektroskopischen Faktoren fuer den ein-Nukleon-Transfer, und die elektrischen und magnetischen Momente zeigen im allgemeinen gute Uebereinstimmung mit den experimentellen Daten. Fuer die Halbwertszeiten und Mischungsverhaeltnisse, welche die empfindlichten Details der 3.q.p.-Komponenten sind, ist die Uebereinstimmung weniger gut, aber sie liegen alle in der richtigen Groessenordnung. (orig.)Primary Subject
Source
63 refs.
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Z. Phys., A; v. 288(1); p. 49-57
Country of publication
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AbstractAbstract
No abstract available
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Nederlandse Natuurkundige Vereniging, Utrecht. Sectie Kernfysica; p. 13; 15 Oct 1976; Nederlandse Natuurkundige Vereniging, Sectie Kernfysica, autumn meeting; Groningen, Netherlands; 22 Oct 1976; Published in summary form only.
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Report
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Conference
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AbstractAbstract
No abstract available
Primary Subject
Source
Anagnostatos, G.S.; Kalfas, C.A.; Kossionides, S.; Paradellis, T.; Skouras, L.D.; Vourvopoulos, G. (eds.); Democritus Nuclear Research Center, Athens (Greece); The Institute of Physics Conference Series; no. 49; p. 247-249; ISBN 0 85498 140 3; 
; 1980; p. 247-249; Institute of Physics; Bristol; 6. European Physical Society Nuclear Divisional conference on the structure of medium-heavy nuclei; Rhodes, Greece; 1 - 4 May 1979; Extended abstract only.
; 1980; p. 247-249; Institute of Physics; Bristol; 6. European Physical Society Nuclear Divisional conference on the structure of medium-heavy nuclei; Rhodes, Greece; 1 - 4 May 1979; Extended abstract only.
Record Type
Book
Literature Type
Conference
Country of publication
ARSENIC ISOTOPES, BROKEN-PAIR APPROXIMATION, COLLECTIVE MODEL, ENERGY DEPENDENCE, EXCITATION, EXCITED STATES, HOLES, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTO, KRYPTON 87, MEV RANGE 01-10, MOLYBDENUM 93, MULTIPLETS, NIOBIUM 91, PROTON-NEUTRON INTERACTIONS, RUTHENIUM 95, SCHIFFER POTENTIAL, SHELL MODELS, STRONTIUM 89, TECHNETIUM 93, TIN ISOTOPES, YTTRIUM 89, ZIRCONIUM 91
BARYON-BARYON INTERACTIONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, DAYS LIVING RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-ODD NUCLEI, HADRON-HADRON INTERACTIONS, HOURS LIVING RADIOISOTOPES, INTERACTIONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, KRYPTON ISOTOPES, MATHEMATICAL MODELS, MEV RANGE, MINUTES LIVING RADIOISOTOPES, MOLYBDENUM ISOTOPES, NIOBIUM ISOTOPES, NUCLEAR MODELS, NUCLEI, NUCLEON-NUCLEON INTERACTIONS, NUCLEON-NUCLEON POTENTIAL, ODD-EVEN NUCLEI, PARTICLE INTERACTIONS, RADIOISOTOPES, RUTHENIUM ISOTOPES, SECONDS LIVING RADIOISOTOPES, STABLE ISOTOPES, STRONTIUM ISOTOPES, TECHNETIUM ISOTOPES, YEARS LIVING RADIOISOTOPES, YTTRIUM ISOTOPES, ZIRCONIUM ISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
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AbstractAbstract
[en] An attempt was made to improve the description of the collective 2+ and 3- states in even single-closed-shell nuclei by using a 'realistic' effective interaction based on the Reid soft core potential instead of the Gaussian forces which are commonly used. As an example, the Sn isotopes are considered. The results of the Reid force are no better than those of the Gaussian. The too large excitation-energies of the collective 2+ and 3- states found earlier are apparently not due to particular features of the Gaussian effective forces used. Explicit admixture of a quadrupole and an octupole part in the effective interaction does improve the description of the collective 2+ and 3- states, but it makes the description of the other excited states worse
Primary Subject
Source
Gunsteren, W.F. van.; Vrije Universiteit, Amsterdam (Netherlands); p. 85-96; 10 Sep 1976; Also published in Z. Phys. A (DE), Sep 1976, v. 278(3), p. 251-255.
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Report
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Thesis/Dissertation
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