Naslov
Cross-shell excitations in 46Ca studied with fusion reactions induced by a reaccelerated rare isotope beam

Autori
Ash, J. ; Iwasaki, H. ; Mijatović, Tea ; Budner, T. ; Elder, R. ; Elman, B. ; Friedman, M. ; Gade, A. ; Grinder, M. ; Henderson, J. ; Longfellow, B. ; Revel, A. ; Rhodes, D. ; Spieker, M. ; Utsuno, Y. ; Weisshaar, D. ; Wu, C. Y.

Izvornik
Physical review. C (2469-9985) 103 (2021); L051302-8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
collective levels ; nuclear fusion

Sažetak
Discovering unexplored high-spin states in neutron-rich nuclei can open up a new direction to study band structure and the associated shell structure in isospin-asymmetric many-body systems. However, experimental reach has so far been limited to neutron-deficient or stable nuclei which are preferentially produced in fusion reactions used in such studies. Here, we report the first γ-ray spectroscopy with fusion reactions using a reaccelerated rare-isotope beam of 45K performed at the ReA3 facility of the National Superconducting Cyclotron Laboratory. Using particle and γ-ray coincidence techniques, three new higher-lying states around 6 MeV and five new γ-ray transitions were identified for 46Ca, suggesting three independent band structures formed from different particle-hole configurations. The rotational-like band built on the 0+2 state is established up to the tentatively assigned 6+2 state. New results are compared to large-scale shell model calculations, confirming the validity of the effective interaction describing particle-hole excitations across the Z=20 and N=28 shell gaps in the vicinity of doubly magic 48Ca.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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