We study in cranked Nilsson plus random phase approximation the electric monopole sE0d, quadrupole sE2d, and magnetic dipole sM1d responses in fast rotating nuclei undergoing backbending, more specifically 156Dy and 158Er. Special attention is paid at the orbital M1 excitations known as scissors mode. We find that the overall strength of the orbital M1 transitions gets enhanced by more than a factor of 4 above the critical backbending region. We show that such a strength evolves with the rotational frequency in close correspondence with the nuclear moment of inertia. This link provides the main clue for understanding the physical origin of such an enhancement, which, if experimentally confirmed, would represent a distinctive feature of nuclei exhibiting backbending.

Collective magnetic excitations and backbending in fast rotating nuclei

LO IUDICE, NICOLA;PORRINO, ANTONIO;
2004

Abstract

We study in cranked Nilsson plus random phase approximation the electric monopole sE0d, quadrupole sE2d, and magnetic dipole sM1d responses in fast rotating nuclei undergoing backbending, more specifically 156Dy and 158Er. Special attention is paid at the orbital M1 excitations known as scissors mode. We find that the overall strength of the orbital M1 transitions gets enhanced by more than a factor of 4 above the critical backbending region. We show that such a strength evolves with the rotational frequency in close correspondence with the nuclear moment of inertia. This link provides the main clue for understanding the physical origin of such an enhancement, which, if experimentally confirmed, would represent a distinctive feature of nuclei exhibiting backbending.
File in questo prodotto:
File Dimensione Formato  
Collective.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Accesso privato/ristretto
Dimensione 483.73 kB
Formato Adobe PDF
483.73 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/204065
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact