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Titolo:
BROKEN PAIRS IN THE INTERACTING BOSON MODEL - PROJECTION OF SPURIOUS STATES
Autore:
CACCIAMANI S; BONSIGNORI G; IACHELLO F; VRETENAR D;
Indirizzi:
UNIV BOLOGNA,IST NAZL FIS NUCL BOLOGNA ITALY UNIV BOLOGNA,DEPT PHYS I-40126 BOLOGNA ITALY YALE UNIV,CTR THEORET PHYS NEW HAVEN CT 06511 UNIV ZAGREB,FAC SCI,DEPT PHYS ZAGREB 41000 CROATIA
Titolo Testata:
Physical review. C. Nuclear physics
fascicolo: 4, volume: 53, anno: 1996,
pagine: 1618 - 1631
SICI:
0556-2813(1996)53:4<1618:BPITIB>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVEN SN NUCLEI; HIGH-SPIN STATES; 2-QUASIPARTICLE STATES; SHELL-MODEL; COLLECTIVE BANDS; HG ISOTOPES; GE ISOTOPES; SU(3) LIMIT; PROTON; IBA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
S. Cacciamani et al., "BROKEN PAIRS IN THE INTERACTING BOSON MODEL - PROJECTION OF SPURIOUS STATES", Physical review. C. Nuclear physics, 53(4), 1996, pp. 1618-1631

Abstract

The interacting boson model is extended by the inclusion of selectivenoncollective fermion states through the successive breaking of the correlated S and D pairs (s and d bosons). High angular momentum statesare generated in this way, and their structure described by the coupling between fermions in broken pairs and the boson core. The model space of bosons and broken pairs contains also unphysical states that aregenerated automatically when fermions couple to angular momenta J(F)=0 and 2. A procedure is derived for the projection of spurious components from bases that contain one fermion pair. Spurious states are identified and an algorithm for their projection is constructed. The modelis applied to the description of states in the spherical nucleus Sn-116, and the weakly deformed nucleus Sr-82. Calculated spectra and transition probabilities are compared with experimental data. It is found that projection of spurious states from the model space is essential for a description of excited states with low angular momenta above the yrast, while it is less important for high-spin states close to the yrast line.

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Documento generato il 18/09/20 alle ore 16:00:04