Naslov
Role of momentum transfer in the quenching of the Gamow-Teller strength

Autori
Marketin, Tomislav ; Martínez-Pinedo, G ; Paar, Nils ; Vretenar, D

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
NUCLEAR STRUCTURE AND DYNAMICS 2012 / Tamara Nikšić, Matko Milin, Dario Vretenar, Suzana Szilner - Melville (NY) : American Institute of Physics (AIP), 2012, 178-181

ISBN
978-0-7354-1103-6

Skup
NUCLEAR STRUCTURE AND DYNAMICS 2012

Mjesto i datum
Opatija, Hrvatska, 09.07.2012. - 13.07.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
momentum transfer; Gamow-Teller resonances; charge-exchange transitions; RPA

Sažetak
A recent analysis of (p, n) and (n, p) reaction data from 90Zr was performed recently, where a significant amount of Gamow-Teller strength was found above the resonance, an energy region previously unreachable by experimental setups. The extracted strengths in the β− and the β+ channel indicate that approximately 10% of the total strength necessary to satisfy the model independent Ikeda sum rule is missing. One possible source of this discrepancy is the treatment of the isovector spin monopole (IVSM) mode of excitation which has been found to occurr at high excitation energies. Employing the relativistic Hartree-Bogoliubov (RHB) model and the protonneutron relativistic quasiparticle random phase approximation (pn- RQRPA) to calculate the nuclear response, we explore the contribution of the IVSM mode to the total L = 0 strength and apply our results to the available data.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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