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Low-spin collective behavior in the transitional nuclei Mo-86,Mo-88
KTH, Skolan för teknikvetenskap (SCI), Fysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik.ORCID-id: 0000-0003-1771-2656
KTH, Skolan för teknikvetenskap (SCI), Fysik.
Visa övriga samt affilieringar
2007 (Engelska)Ingår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, nr 1, s. 014307-1-014307-9Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Low-spin structures in Mo-86,Mo-88 were populated using the Ni-58(Ar-36, x alpha yp) heavy-ion fusion-evaporation reaction at a beam energy of 111 MeV. Charged particles and gamma rays were emitted in the reactions and detected by the DIAMANT CsI ball and the EXOGAM Ge array, respectively. In addition to the previously reported low-to-medium spin states in these nuclei, new low-spin structures were observed. Angular correlation and linear polarization measurements were performed in order to unambiguously determine the spins and parities of intensely populated states in Mo-88. Quasiparticle Random Phase Approximation (QRPA) calculations were performed for the first and second excited 2(+) states in Mo-86 and Mo-88. The results are in qualitative agreement with the experimental results, supporting a collective interpretation of the low-spin states for these transitional nuclei.

Ort, förlag, år, upplaga, sidor
2007. Vol. 76, nr 1, s. 014307-1-014307-9
Nyckelord [en]
STATES; MO-90; ZR-86; MO-88; SPECTROSCOPY; STRENGTHS; ENERGIES; SHAPES; BANDS
Nationell ämneskategori
Subatomär fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-8210DOI: 10.1103/PhysRevC.76.014307ISI: 000248542400026Scopus ID: 2-s2.0-34547659038OAI: oai:DiVA.org:kth-8210DiVA, id: diva2:13469
Anmärkning
QC 20100621Tillgänglig från: 2008-04-09 Skapad: 2008-04-09 Senast uppdaterad: 2017-12-14Bibliografiskt granskad
Ingår i avhandling
1. Studies of collective phenomena in neutron deficient nuclei: by means of lifetime measurements, angular correlation measurements and the recoil-decay tagging technique
Öppna denna publikation i ny flik eller fönster >>Studies of collective phenomena in neutron deficient nuclei: by means of lifetime measurements, angular correlation measurements and the recoil-decay tagging technique
2008 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The nucleus is a mesoscopic system that retains features from both the quantum and macroscopic worlds. A basic property of a macroscopic body is its shape. Nuclear shapes can be deduced from experimental data as they influence the excitation mode of the nucleus and hence the energies and lifetimes of its excited levels. Various short-lived nuclei were created in fusion-evaporation experiments performed at international heavy-ion accelerator facilities. The emitted γ rays and, in some experiments, also the charged particles and neutrons emitted in the reactions were detected. The studied neutron-deficient isotopes were either selected by the type and number of particles emitted in the reactions, or by using their characteristic decays. The excited states of the different isotopes were extracted from the γ-ray analyses. Spectroscopic properties, such as the lifetimes of the excited states or the angular distribution of the emitted γ rays were measured when possible. The experimentally obtained level schemes together with the other spectroscopic information were used to deduce the excitation modes and the shapes of the studied nuclei. The detector systems are described in the first chapter and in the second chapter some techniques used to extract information from the experimental data are explained. Finally, a brief theoretical overview on the nuclear models which were used to interpret the experimental results is given.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2008. s. x, 57
Serie
Trita-FYS, ISSN 0280-316X ; 2008:15
Nyckelord
heavy-ion reactions, multi-detector arrays, recoil separator, in-beam gamma-ray spectroscopy, high spin states, lifetime measurements, recoil-decay tagging, nuclear shape
Nationell ämneskategori
Subatomär fysik
Identifikatorer
urn:nbn:se:kth:diva-4693 (URN)978-91-7178-929-7 (ISBN)
Disputation
2008-04-28, FA32, AlbaNova, 10691 Stockholm, 10:00
Opponent
Handledare
Anmärkning
QC 20100621Tillgänglig från: 2008-04-09 Skapad: 2008-04-09 Senast uppdaterad: 2010-08-20Bibliografiskt granskad

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